Resguardo inicial

linux-7.2.3/drivers/media/pci/intel/Kconfig

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+source "drivers/media/pci/intel/ipu3/Kconfig"
+source "drivers/media/pci/intel/ipu6/Kconfig"
+source "drivers/media/pci/intel/ivsc/Kconfig"
+
+config IPU_BRIDGE
+	tristate "Intel IPU Bridge"
+	depends on ACPI
+	depends on I2C
+	help
+	  The IPU bridge is a helper library for Intel IPU drivers to
+	  function on systems shipped with Windows.
+
+	  Currently used by the ipu3-cio2 and atomisp drivers.
+
+	  Supported systems include:
+
+	  - Microsoft Surface models (except Surface Pro 3)
+	  - The Lenovo Miix line (for example the 510, 520, 710 and 720)
+	  - Dell 7285

linux-7.2.3/drivers/media/pci/intel/Makefile

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the IPU drivers
+#
+obj-$(CONFIG_IPU_BRIDGE) += ipu-bridge.o
+obj-y	+= ipu3/
+obj-y	+= ivsc/
+obj-$(CONFIG_VIDEO_INTEL_IPU6)	+= ipu6/

linux-7.2.3/drivers/media/pci/intel/ipu-bridge.c

@@ -0,0 +1,934 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <linux/cleanup.h>
+#include <linux/device.h>
+#include <linux/dmi.h>
+#include <linux/i2c.h>
+#include <linux/mei_cl_bus.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/string.h>
+#include <linux/workqueue.h>
+
+#include <media/ipu-bridge.h>
+#include <media/v4l2-fwnode.h>
+
+#define ADEV_DEV(adev) ACPI_PTR(&((adev)->dev))
+
+/*
+ * 92335fcf-3203-4472-af93-7b4453ac29da
+ *
+ * Used to build MEI CSI device name to lookup MEI CSI device by
+ * device_find_child_by_name().
+ */
+#define MEI_CSI_UUID							\
+	UUID_LE(0x92335FCF, 0x3203, 0x4472,				\
+		0xAF, 0x93, 0x7B, 0x44, 0x53, 0xAC, 0x29, 0xDA)
+
+/*
+ * IVSC device name
+ *
+ * Used to match IVSC device by ipu_bridge_match_ivsc_dev()
+ */
+#define IVSC_DEV_NAME "intel_vsc"
+
+/*
+ * Extend this array with ACPI Hardware IDs of devices known to be working
+ * plus the number of link-frequencies expected by their drivers, along with
+ * the frequency values in hertz. This is somewhat opportunistic way of adding
+ * support for this for now in the hopes of a better source for the information
+ * (possibly some encoded value in the SSDB buffer that we're unaware of)
+ * becoming apparent in the future.
+ *
+ * Do not add an entry for a sensor that is not actually supported.
+ *
+ * Please keep the list sorted by ACPI HID.
+ */
+static const struct ipu_sensor_config ipu_supported_sensors[] = {
+	/* Himax HM11B1 */
+	IPU_SENSOR_CONFIG("HIMX11B1", 1, 384000000),
+	/* Himax HM2170 */
+	IPU_SENSOR_CONFIG("HIMX2170", 1, 384000000),
+	/* Himax HM2172 */
+	IPU_SENSOR_CONFIG("HIMX2172", 1, 384000000),
+	/* GalaxyCore GC0310 */
+	IPU_SENSOR_CONFIG("INT0310", 1, 55692000),
+	/* Omnivision OV5693 */
+	IPU_SENSOR_CONFIG("INT33BE", 1, 419200000),
+	/* Onsemi MT9M114 */
+	IPU_SENSOR_CONFIG("INT33F0", 1, 384000000),
+	/* Omnivision OV2740 */
+	IPU_SENSOR_CONFIG("INT3474", 1, 180000000),
+	/* Omnivision OV5670 */
+	IPU_SENSOR_CONFIG("INT3479", 1, 422400000),
+	/* Omnivision OV8865 */
+	IPU_SENSOR_CONFIG("INT347A", 1, 360000000),
+	/* Omnivision OV7251 */
+	IPU_SENSOR_CONFIG("INT347E", 1, 319200000),
+	/* Hynix Hi-556 */
+	IPU_SENSOR_CONFIG("INT3537", 1, 437000000),
+	/* Lontium lt6911uxe */
+	IPU_SENSOR_CONFIG("INTC10C5", 0),
+	/* Omnivision OV01A10 / OV01A1S */
+	IPU_SENSOR_CONFIG("OVTI01A0", 1, 400000000),
+	IPU_SENSOR_CONFIG("OVTI01AS", 1, 400000000),
+	/* Omnivision OV02C10 */
+	IPU_SENSOR_CONFIG("OVTI02C1", 1, 400000000),
+	/* Omnivision OV02E10 */
+	IPU_SENSOR_CONFIG("OVTI02E1", 1, 360000000),
+	/* Omnivision ov05c10 */
+	IPU_SENSOR_CONFIG("OVTI05C1", 1, 480000000),
+	/* Omnivision OV08A10 */
+	IPU_SENSOR_CONFIG("OVTI08A1", 1, 500000000),
+	/* Omnivision OV08x40 */
+	IPU_SENSOR_CONFIG("OVTI08F4", 3, 400000000, 749000000, 800000000),
+	/* Omnivision OV13B10 */
+	IPU_SENSOR_CONFIG("OVTI13B1", 1, 560000000),
+	IPU_SENSOR_CONFIG("OVTIDB10", 1, 560000000),
+	/* Omnivision OV2680 */
+	IPU_SENSOR_CONFIG("OVTI2680", 1, 331200000),
+	/* Omnivision OV5675 */
+	IPU_SENSOR_CONFIG("OVTI5675", 1, 450000000),
+	/* Omnivision OV8856 */
+	IPU_SENSOR_CONFIG("OVTI8856", 3, 180000000, 360000000, 720000000),
+	/* Sony IMX471 */
+	IPU_SENSOR_CONFIG("SONY471A", 1, 200000000),
+	/* Toshiba T4KA3 */
+	IPU_SENSOR_CONFIG("XMCC0003", 1, 321468000),
+};
+
+/*
+ * DMI matches for laptops which have their sensor mounted upside-down
+ * without reporting a rotation of 180° in neither the SSDB nor the _PLD.
+ */
+static const struct dmi_system_id upside_down_sensor_dmi_ids[] = {
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 13 9340"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 13 9350"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 14 9440"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 16 9640"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{} /* Terminating entry */
+};
+
+static const struct ipu_property_names prop_names = {
+	.clock_frequency = "clock-frequency",
+	.rotation = "rotation",
+	.orientation = "orientation",
+	.bus_type = "bus-type",
+	.data_lanes = "data-lanes",
+	.remote_endpoint = "remote-endpoint",
+	.link_frequencies = "link-frequencies",
+};
+
+static const char * const ipu_vcm_types[] = {
+	"ad5823",
+	"dw9714",
+	"ad5816",
+	"dw9719",
+	"dw9718",
+	"dw9806b",
+	"wv517s",
+	"lc898122xa",
+	"lc898212axb",
+};
+
+/*
+ * Used to figure out IVSC acpi device by ipu_bridge_get_ivsc_acpi_dev()
+ * instead of device and driver match to probe IVSC device.
+ */
+static const struct acpi_device_id ivsc_acpi_ids[] = {
+	{ "INTC1059" },
+	{ "INTC1095" },
+	{ "INTC100A" },
+	{ "INTC10CF" },
+	{ "INTC10DE" }, /* LNL */
+	{ "INTC10E0" }, /* ARL */
+	{ "INTC10E1" }, /* PTL */
+};
+
+static struct acpi_device *ipu_bridge_get_ivsc_acpi_dev(struct acpi_device *adev)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(ivsc_acpi_ids); i++) {
+		const struct acpi_device_id *acpi_id = &ivsc_acpi_ids[i];
+		struct acpi_device *consumer, *ivsc_adev;
+
+		acpi_handle handle = acpi_device_handle(ACPI_PTR(adev));
+		for_each_acpi_dev_match(ivsc_adev, acpi_id->id, NULL, -1)
+			/* camera sensor depends on IVSC in DSDT if exist */
+			for_each_acpi_consumer_dev(ivsc_adev, consumer)
+				if (ACPI_PTR(consumer->handle) == handle) {
+					acpi_dev_put(consumer);
+					return ivsc_adev;
+				}
+	}
+
+	return NULL;
+}
+
+static int ipu_bridge_match_ivsc_dev(struct device *dev, const void *adev)
+{
+	if (ACPI_COMPANION(dev) != adev)
+		return 0;
+
+	if (!sysfs_streq(dev_name(dev), IVSC_DEV_NAME))
+		return 0;
+
+	return 1;
+}
+
+static struct device *ipu_bridge_get_ivsc_csi_dev(struct acpi_device *adev)
+{
+	struct device *dev, *csi_dev;
+	uuid_le uuid = MEI_CSI_UUID;
+	char name[64];
+
+	/* IVSC device on platform bus */
+	dev = bus_find_device(&platform_bus_type, NULL, adev,
+			      ipu_bridge_match_ivsc_dev);
+	if (dev) {
+		snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev), &uuid);
+
+		csi_dev = device_find_child_by_name(dev, name);
+
+		put_device(dev);
+
+		return csi_dev;
+	}
+
+	/* Try to locate CVS device on the I2C bus */
+	csi_dev = bus_find_device_by_acpi_dev(&i2c_bus_type, adev);
+	if (csi_dev)
+		return csi_dev;
+
+	/* Fallback to platform bus for CVS device */
+	return bus_find_device_by_acpi_dev(&platform_bus_type, adev);
+}
+
+static int ipu_bridge_check_ivsc_dev(struct ipu_sensor *sensor,
+				     struct acpi_device *sensor_adev)
+{
+	struct acpi_device *adev;
+	struct device *csi_dev;
+
+	adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev);
+	if (adev) {
+		csi_dev = ipu_bridge_get_ivsc_csi_dev(adev);
+		if (!csi_dev) {
+			acpi_dev_put(adev);
+			dev_err(ADEV_DEV(adev), "Failed to find MEI or CVS CSI dev\n");
+			return -ENODEV;
+		}
+
+		sensor->csi_dev = csi_dev;
+		sensor->ivsc_adev = adev;
+	}
+
+	return 0;
+}
+
+static int ipu_bridge_read_acpi_buffer(struct acpi_device *adev, char *id,
+				       void *data, u32 size)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+	acpi_status status;
+	int ret = 0;
+
+	status = acpi_evaluate_object(ACPI_PTR(adev->handle),
+				      id, NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	obj = buffer.pointer;
+	if (!obj) {
+		dev_err(ADEV_DEV(adev), "Couldn't locate ACPI buffer\n");
+		return -ENODEV;
+	}
+
+	if (obj->type != ACPI_TYPE_BUFFER) {
+		dev_err(ADEV_DEV(adev), "Not an ACPI buffer\n");
+		ret = -ENODEV;
+		goto out_free_buff;
+	}
+
+	if (obj->buffer.length > size) {
+		dev_err(ADEV_DEV(adev), "Given buffer is too small\n");
+		ret = -EINVAL;
+		goto out_free_buff;
+	}
+
+	memcpy(data, obj->buffer.pointer, obj->buffer.length);
+
+out_free_buff:
+	kfree(buffer.pointer);
+	return ret;
+}
+
+static u32 ipu_bridge_parse_rotation(struct acpi_device *adev,
+				     struct ipu_sensor_ssdb *ssdb)
+{
+	const struct dmi_system_id *dmi_id;
+
+	dmi_id = dmi_first_match(upside_down_sensor_dmi_ids);
+	if (dmi_id && acpi_dev_hid_match(adev, dmi_id->driver_data))
+		return 180;
+
+	switch (ssdb->degree) {
+	case IPU_SENSOR_ROTATION_NORMAL:
+		return 0;
+	case IPU_SENSOR_ROTATION_INVERTED:
+		return 180;
+	default:
+		dev_warn(ADEV_DEV(adev),
+			 "Unknown rotation %d. Assume 0 degree rotation\n",
+			 ssdb->degree);
+		return 0;
+	}
+}
+
+static enum v4l2_fwnode_orientation ipu_bridge_parse_orientation(struct acpi_device *adev)
+{
+	enum v4l2_fwnode_orientation orientation;
+	struct acpi_pld_info *pld = NULL;
+
+	if (!acpi_get_physical_device_location(ACPI_PTR(adev->handle), &pld)) {
+		dev_warn(ADEV_DEV(adev), "_PLD call failed, using default orientation\n");
+		return V4L2_FWNODE_ORIENTATION_EXTERNAL;
+	}
+
+	switch (pld->panel) {
+	case ACPI_PLD_PANEL_FRONT:
+		orientation = V4L2_FWNODE_ORIENTATION_FRONT;
+		break;
+	case ACPI_PLD_PANEL_BACK:
+		orientation = V4L2_FWNODE_ORIENTATION_BACK;
+		break;
+	case ACPI_PLD_PANEL_TOP:
+	case ACPI_PLD_PANEL_LEFT:
+	case ACPI_PLD_PANEL_RIGHT:
+	case ACPI_PLD_PANEL_UNKNOWN:
+		orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
+		break;
+	default:
+		dev_warn(ADEV_DEV(adev), "Unknown _PLD panel val %d\n",
+			 pld->panel);
+		orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
+		break;
+	}
+
+	ACPI_FREE(pld);
+	return orientation;
+}
+
+int ipu_bridge_parse_ssdb(struct acpi_device *adev, struct ipu_sensor *sensor)
+{
+	struct ipu_sensor_ssdb ssdb = {};
+	int ret;
+
+	ret = ipu_bridge_read_acpi_buffer(adev, "SSDB", &ssdb, sizeof(ssdb));
+	if (ret)
+		return ret;
+
+	if (ssdb.vcmtype > ARRAY_SIZE(ipu_vcm_types)) {
+		dev_warn(ADEV_DEV(adev), "Unknown VCM type %d\n", ssdb.vcmtype);
+		ssdb.vcmtype = 0;
+	}
+
+	if (ssdb.lanes > IPU_MAX_LANES) {
+		dev_err(ADEV_DEV(adev), "Number of lanes in SSDB is invalid\n");
+		return -EINVAL;
+	}
+
+	sensor->link = ssdb.link;
+	sensor->lanes = ssdb.lanes;
+	sensor->mclkspeed = ssdb.mclkspeed;
+	sensor->rotation = ipu_bridge_parse_rotation(adev, &ssdb);
+	sensor->orientation = ipu_bridge_parse_orientation(adev);
+
+	if (ssdb.vcmtype)
+		sensor->vcm_type = ipu_vcm_types[ssdb.vcmtype - 1];
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu_bridge_parse_ssdb, "INTEL_IPU_BRIDGE");
+
+static void ipu_bridge_create_fwnode_properties(
+	struct ipu_sensor *sensor,
+	struct ipu_bridge *bridge,
+	const struct ipu_sensor_config *cfg)
+{
+	struct ipu_property_names *names = &sensor->prop_names;
+	struct software_node *nodes = sensor->swnodes;
+
+	sensor->prop_names = prop_names;
+
+	if (sensor->csi_dev) {
+		sensor->local_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_SENSOR_ENDPOINT]);
+		sensor->remote_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_IPU_ENDPOINT]);
+		sensor->ivsc_sensor_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]);
+		sensor->ivsc_ipu_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]);
+
+		sensor->ivsc_sensor_ep_properties[0] =
+			PROPERTY_ENTRY_U32(names->bus_type,
+					   V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
+		sensor->ivsc_sensor_ep_properties[1] =
+			PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes,
+						     bridge->data_lanes,
+						     sensor->lanes);
+		sensor->ivsc_sensor_ep_properties[2] =
+			PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint,
+						 sensor->ivsc_sensor_ref);
+
+		sensor->ivsc_ipu_ep_properties[0] =
+			PROPERTY_ENTRY_U32(names->bus_type,
+					   V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
+		sensor->ivsc_ipu_ep_properties[1] =
+			PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes,
+						     bridge->data_lanes,
+						     sensor->lanes);
+		sensor->ivsc_ipu_ep_properties[2] =
+			PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint,
+						 sensor->ivsc_ipu_ref);
+	} else {
+		sensor->local_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]);
+		sensor->remote_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]);
+	}
+
+	sensor->dev_properties[0] = PROPERTY_ENTRY_U32(
+					sensor->prop_names.clock_frequency,
+					sensor->mclkspeed);
+	sensor->dev_properties[1] = PROPERTY_ENTRY_U32(
+					sensor->prop_names.rotation,
+					sensor->rotation);
+	sensor->dev_properties[2] = PROPERTY_ENTRY_U32(
+					sensor->prop_names.orientation,
+					sensor->orientation);
+	if (sensor->vcm_type) {
+		sensor->vcm_ref[0] =
+			SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_VCM]);
+		sensor->dev_properties[3] =
+			PROPERTY_ENTRY_REF_ARRAY("lens-focus", sensor->vcm_ref);
+	}
+
+	sensor->ep_properties[0] = PROPERTY_ENTRY_U32(
+					sensor->prop_names.bus_type,
+					V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
+	sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(
+					sensor->prop_names.data_lanes,
+					bridge->data_lanes, sensor->lanes);
+	sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(
+					sensor->prop_names.remote_endpoint,
+					sensor->local_ref);
+
+	if (cfg->nr_link_freqs > 0)
+		sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN(
+			sensor->prop_names.link_frequencies,
+			cfg->link_freqs,
+			cfg->nr_link_freqs);
+
+	sensor->ipu_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(
+					sensor->prop_names.data_lanes,
+					bridge->data_lanes, sensor->lanes);
+	sensor->ipu_properties[1] = PROPERTY_ENTRY_REF_ARRAY(
+					sensor->prop_names.remote_endpoint,
+					sensor->remote_ref);
+}
+
+static void ipu_bridge_init_swnode_names(struct ipu_sensor *sensor)
+{
+	snprintf(sensor->node_names.remote_port,
+		 sizeof(sensor->node_names.remote_port),
+		 SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
+	snprintf(sensor->node_names.port,
+		 sizeof(sensor->node_names.port),
+		 SWNODE_GRAPH_PORT_NAME_FMT, 0); /* Always port 0 */
+	snprintf(sensor->node_names.endpoint,
+		 sizeof(sensor->node_names.endpoint),
+		 SWNODE_GRAPH_ENDPOINT_NAME_FMT, 0); /* And endpoint 0 */
+	if (sensor->vcm_type) {
+		/* append link to distinguish nodes with same model VCM */
+		snprintf(sensor->node_names.vcm, sizeof(sensor->node_names.vcm),
+			 "%s-%u", sensor->vcm_type, sensor->link);
+	}
+
+	if (sensor->csi_dev) {
+		snprintf(sensor->node_names.ivsc_sensor_port,
+			 sizeof(sensor->node_names.ivsc_sensor_port),
+			 SWNODE_GRAPH_PORT_NAME_FMT, 0);
+		snprintf(sensor->node_names.ivsc_ipu_port,
+			 sizeof(sensor->node_names.ivsc_ipu_port),
+			 SWNODE_GRAPH_PORT_NAME_FMT, 1);
+	}
+}
+
+static void ipu_bridge_init_swnode_group(struct ipu_sensor *sensor)
+{
+	struct software_node *nodes = sensor->swnodes;
+
+	sensor->group[SWNODE_SENSOR_HID] = &nodes[SWNODE_SENSOR_HID];
+	sensor->group[SWNODE_SENSOR_PORT] = &nodes[SWNODE_SENSOR_PORT];
+	sensor->group[SWNODE_SENSOR_ENDPOINT] = &nodes[SWNODE_SENSOR_ENDPOINT];
+	sensor->group[SWNODE_IPU_PORT] = &nodes[SWNODE_IPU_PORT];
+	sensor->group[SWNODE_IPU_ENDPOINT] = &nodes[SWNODE_IPU_ENDPOINT];
+	if (sensor->vcm_type)
+		sensor->group[SWNODE_VCM] =  &nodes[SWNODE_VCM];
+
+	if (sensor->csi_dev) {
+		sensor->group[SWNODE_IVSC_HID] =
+					&nodes[SWNODE_IVSC_HID];
+		sensor->group[SWNODE_IVSC_SENSOR_PORT] =
+					&nodes[SWNODE_IVSC_SENSOR_PORT];
+		sensor->group[SWNODE_IVSC_SENSOR_ENDPOINT] =
+					&nodes[SWNODE_IVSC_SENSOR_ENDPOINT];
+		sensor->group[SWNODE_IVSC_IPU_PORT] =
+					&nodes[SWNODE_IVSC_IPU_PORT];
+		sensor->group[SWNODE_IVSC_IPU_ENDPOINT] =
+					&nodes[SWNODE_IVSC_IPU_ENDPOINT];
+
+		if (sensor->vcm_type)
+			sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM];
+	} else {
+		if (sensor->vcm_type)
+			sensor->group[SWNODE_IVSC_HID] = &nodes[SWNODE_VCM];
+	}
+}
+
+static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge,
+						 struct ipu_sensor *sensor)
+{
+	struct ipu_node_names *names = &sensor->node_names;
+	struct software_node *nodes = sensor->swnodes;
+
+	ipu_bridge_init_swnode_names(sensor);
+
+	nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name,
+					       sensor->dev_properties);
+	nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port,
+					      &nodes[SWNODE_SENSOR_HID]);
+	nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(
+						sensor->node_names.endpoint,
+						&nodes[SWNODE_SENSOR_PORT],
+						sensor->ep_properties);
+	nodes[SWNODE_IPU_PORT] = NODE_PORT(sensor->node_names.remote_port,
+					   &bridge->ipu_hid_node);
+	nodes[SWNODE_IPU_ENDPOINT] = NODE_ENDPOINT(
+						sensor->node_names.endpoint,
+						&nodes[SWNODE_IPU_PORT],
+						sensor->ipu_properties);
+
+	if (sensor->csi_dev) {
+		const char *device_hid = "";
+
+		device_hid = acpi_device_hid(sensor->ivsc_adev);
+
+		snprintf(sensor->ivsc_name, sizeof(sensor->ivsc_name), "%s-%u",
+			 device_hid, sensor->link);
+
+		nodes[SWNODE_IVSC_HID] = NODE_SENSOR(sensor->ivsc_name,
+						     sensor->ivsc_properties);
+		nodes[SWNODE_IVSC_SENSOR_PORT] =
+				NODE_PORT(names->ivsc_sensor_port,
+					  &nodes[SWNODE_IVSC_HID]);
+		nodes[SWNODE_IVSC_SENSOR_ENDPOINT] =
+				NODE_ENDPOINT(names->endpoint,
+					      &nodes[SWNODE_IVSC_SENSOR_PORT],
+					      sensor->ivsc_sensor_ep_properties);
+		nodes[SWNODE_IVSC_IPU_PORT] =
+				NODE_PORT(names->ivsc_ipu_port,
+					  &nodes[SWNODE_IVSC_HID]);
+		nodes[SWNODE_IVSC_IPU_ENDPOINT] =
+				NODE_ENDPOINT(names->endpoint,
+					      &nodes[SWNODE_IVSC_IPU_PORT],
+					      sensor->ivsc_ipu_ep_properties);
+	}
+
+	nodes[SWNODE_VCM] = NODE_VCM(sensor->node_names.vcm);
+
+	ipu_bridge_init_swnode_group(sensor);
+}
+
+/*
+ * The actual instantiation must be done from a workqueue to avoid
+ * a deadlock on taking list_lock from v4l2-async twice.
+ */
+struct ipu_bridge_instantiate_vcm_work_data {
+	struct work_struct work;
+	struct device *sensor;
+	char name[16];
+	struct i2c_board_info board_info;
+};
+
+static void ipu_bridge_instantiate_vcm_work(struct work_struct *work)
+{
+	struct ipu_bridge_instantiate_vcm_work_data *data =
+		container_of(work, struct ipu_bridge_instantiate_vcm_work_data,
+			     work);
+	struct acpi_device *adev = ACPI_COMPANION(data->sensor);
+	struct i2c_client *vcm_client;
+	bool put_fwnode = true;
+	int ret;
+
+	/*
+	 * The client may get probed before the device_link gets added below
+	 * make sure the sensor is powered-up during probe.
+	 */
+	ret = pm_runtime_get_sync(data->sensor);
+	if (ret < 0) {
+		dev_err(data->sensor, "Error %d runtime-resuming sensor, cannot instantiate VCM\n",
+			ret);
+		goto out_pm_put;
+	}
+
+	/*
+	 * Note the client is created only once and then kept around
+	 * even after a rmmod, just like the software-nodes.
+	 */
+	vcm_client = i2c_acpi_new_device_by_fwnode(acpi_fwnode_handle(adev),
+						   1, &data->board_info);
+	if (IS_ERR(vcm_client)) {
+		dev_err(data->sensor, "Error instantiating VCM client: %pe\n",
+			vcm_client);
+		goto out_pm_put;
+	}
+
+	device_link_add(&vcm_client->dev, data->sensor, DL_FLAG_PM_RUNTIME);
+
+	dev_info(data->sensor, "Instantiated %s VCM\n", data->board_info.type);
+	put_fwnode = false; /* Ownership has passed to the i2c-client */
+
+out_pm_put:
+	pm_runtime_put(data->sensor);
+	put_device(data->sensor);
+	if (put_fwnode)
+		fwnode_handle_put(data->board_info.fwnode);
+	kfree(data);
+}
+
+int ipu_bridge_instantiate_vcm(struct device *sensor)
+{
+	struct ipu_bridge_instantiate_vcm_work_data *data;
+	struct fwnode_handle *vcm_fwnode;
+	struct i2c_client *vcm_client;
+	struct acpi_device *adev;
+	char *sep;
+
+	adev = ACPI_COMPANION(sensor);
+	if (!adev)
+		return 0;
+
+	vcm_fwnode = fwnode_find_reference(dev_fwnode(sensor), "lens-focus", 0);
+	if (IS_ERR(vcm_fwnode))
+		return 0;
+
+	/* When reloading modules the client will already exist */
+	vcm_client = i2c_find_device_by_fwnode(vcm_fwnode);
+	if (vcm_client) {
+		fwnode_handle_put(vcm_fwnode);
+		put_device(&vcm_client->dev);
+		return 0;
+	}
+
+	data = kzalloc_obj(*data);
+	if (!data) {
+		fwnode_handle_put(vcm_fwnode);
+		return -ENOMEM;
+	}
+
+	INIT_WORK(&data->work, ipu_bridge_instantiate_vcm_work);
+	data->sensor = get_device(sensor);
+	snprintf(data->name, sizeof(data->name), "%s-VCM",
+		 acpi_dev_name(adev));
+	data->board_info.dev_name = data->name;
+	data->board_info.fwnode = vcm_fwnode;
+	snprintf(data->board_info.type, sizeof(data->board_info.type),
+		 "%pfwP", vcm_fwnode);
+	/* Strip "-<link>" postfix */
+	sep = strchrnul(data->board_info.type, '-');
+	*sep = 0;
+
+	queue_work(system_long_wq, &data->work);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu_bridge_instantiate_vcm, "INTEL_IPU_BRIDGE");
+
+static int ipu_bridge_instantiate_ivsc(struct ipu_sensor *sensor)
+{
+	struct fwnode_handle *fwnode;
+
+	if (!sensor->csi_dev)
+		return 0;
+
+	fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_IVSC_HID]);
+	if (!fwnode)
+		return -ENODEV;
+
+	set_secondary_fwnode(sensor->csi_dev, fwnode);
+
+	return 0;
+}
+
+static void ipu_bridge_unregister_sensors(struct ipu_bridge *bridge)
+{
+	struct ipu_sensor *sensor;
+	unsigned int i;
+
+	for (i = 0; i < bridge->n_sensors; i++) {
+		sensor = &bridge->sensors[i];
+		software_node_unregister_node_group(sensor->group);
+		acpi_dev_put(sensor->adev);
+		put_device(sensor->csi_dev);
+		acpi_dev_put(sensor->ivsc_adev);
+	}
+}
+
+static int ipu_bridge_connect_sensor(const struct ipu_sensor_config *cfg,
+				     struct ipu_bridge *bridge)
+{
+	struct fwnode_handle *fwnode, *primary;
+	struct ipu_sensor *sensor;
+	struct acpi_device *adev = NULL;
+	int ret;
+
+	for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
+		if (!ACPI_PTR(adev->status.enabled))
+			continue;
+
+		if (bridge->n_sensors >= IPU_MAX_PORTS) {
+			acpi_dev_put(adev);
+			dev_err(bridge->dev, "Exceeded available IPU ports\n");
+			return -EINVAL;
+		}
+
+		sensor = &bridge->sensors[bridge->n_sensors];
+
+		ret = bridge->parse_sensor_fwnode(adev, sensor);
+		if (ret)
+			goto err_put_adev;
+
+		snprintf(sensor->name, sizeof(sensor->name), "%s-%u",
+			 cfg->hid, sensor->link);
+
+		ret = ipu_bridge_check_ivsc_dev(sensor, adev);
+		if (ret)
+			goto err_put_adev;
+
+		ipu_bridge_create_fwnode_properties(sensor, bridge, cfg);
+		ipu_bridge_create_connection_swnodes(bridge, sensor);
+
+		ret = software_node_register_node_group(sensor->group);
+		if (ret)
+			goto err_put_ivsc;
+
+		fwnode = software_node_fwnode(&sensor->swnodes[
+						      SWNODE_SENSOR_HID]);
+		if (!fwnode) {
+			ret = -ENODEV;
+			goto err_free_swnodes;
+		}
+
+		sensor->adev = ACPI_PTR(acpi_dev_get(adev));
+
+		primary = acpi_fwnode_handle(adev);
+		primary->secondary = fwnode;
+
+		ret = ipu_bridge_instantiate_ivsc(sensor);
+		if (ret)
+			goto err_free_swnodes;
+
+		dev_info(bridge->dev, "Found supported sensor %s\n",
+			 acpi_dev_name(adev));
+
+		bridge->n_sensors++;
+	}
+
+	return 0;
+
+err_free_swnodes:
+	software_node_unregister_node_group(sensor->group);
+err_put_ivsc:
+	put_device(sensor->csi_dev);
+	acpi_dev_put(sensor->ivsc_adev);
+err_put_adev:
+	acpi_dev_put(adev);
+	return ret;
+}
+
+static int ipu_bridge_connect_sensors(struct ipu_bridge *bridge)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
+		const struct ipu_sensor_config *cfg =
+			&ipu_supported_sensors[i];
+
+		ret = ipu_bridge_connect_sensor(cfg, bridge);
+		if (ret)
+			goto err_unregister_sensors;
+	}
+
+	return 0;
+
+err_unregister_sensors:
+	ipu_bridge_unregister_sensors(bridge);
+	return ret;
+}
+
+static int ipu_bridge_ivsc_is_ready(void)
+{
+	struct acpi_device *sensor_adev, *adev;
+	struct device *csi_dev;
+	bool ready = true;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
+		const struct ipu_sensor_config *cfg =
+			&ipu_supported_sensors[i];
+
+		for_each_acpi_dev_match(sensor_adev, cfg->hid, NULL, -1) {
+			if (!ACPI_PTR(sensor_adev->status.enabled))
+				continue;
+
+			adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev);
+			if (!adev)
+				continue;
+
+			csi_dev = ipu_bridge_get_ivsc_csi_dev(adev);
+			if (!csi_dev)
+				ready = false;
+
+			put_device(csi_dev);
+			acpi_dev_put(adev);
+		}
+	}
+
+	return ready;
+}
+
+static int ipu_bridge_check_fwnode_graph(struct fwnode_handle *fwnode)
+{
+	struct fwnode_handle *endpoint;
+
+	if (IS_ERR_OR_NULL(fwnode))
+		return -EINVAL;
+
+	endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
+	if (endpoint) {
+		fwnode_handle_put(endpoint);
+		return 0;
+	}
+
+	return ipu_bridge_check_fwnode_graph(fwnode->secondary);
+}
+
+static DEFINE_MUTEX(ipu_bridge_mutex);
+
+int ipu_bridge_init(struct device *dev,
+		    ipu_parse_sensor_fwnode_t parse_sensor_fwnode)
+{
+	struct fwnode_handle *fwnode;
+	struct ipu_bridge *bridge;
+	unsigned int i;
+	int ret;
+
+	guard(mutex)(&ipu_bridge_mutex);
+
+	if (!ipu_bridge_check_fwnode_graph(dev_fwnode(dev)))
+		return 0;
+
+	if (!ipu_bridge_ivsc_is_ready())
+		return dev_err_probe(dev, -EPROBE_DEFER,
+				     "waiting for IVSC to become ready\n");
+
+	bridge = kzalloc_obj(*bridge);
+	if (!bridge)
+		return -ENOMEM;
+
+	strscpy(bridge->ipu_node_name, IPU_HID,
+		sizeof(bridge->ipu_node_name));
+	bridge->ipu_hid_node.name = bridge->ipu_node_name;
+	bridge->dev = dev;
+	bridge->parse_sensor_fwnode = parse_sensor_fwnode;
+
+	ret = software_node_register(&bridge->ipu_hid_node);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register the IPU HID node\n");
+		goto err_free_bridge;
+	}
+
+	/*
+	 * Map the lane arrangement, which is fixed for the IPU3 (meaning we
+	 * only need one, rather than one per sensor). We include it as a
+	 * member of the struct ipu_bridge rather than a global variable so
+	 * that it survives if the module is unloaded along with the rest of
+	 * the struct.
+	 */
+	for (i = 0; i < IPU_MAX_LANES; i++)
+		bridge->data_lanes[i] = i + 1;
+
+	ret = ipu_bridge_connect_sensors(bridge);
+	if (ret || bridge->n_sensors == 0)
+		goto err_unregister_ipu;
+
+	dev_info(dev, "Connected %d cameras\n", bridge->n_sensors);
+
+	fwnode = software_node_fwnode(&bridge->ipu_hid_node);
+	if (!fwnode) {
+		dev_err(dev, "Error getting fwnode from ipu software_node\n");
+		ret = -ENODEV;
+		goto err_unregister_sensors;
+	}
+
+	set_secondary_fwnode(dev, fwnode);
+
+	return 0;
+
+err_unregister_sensors:
+	ipu_bridge_unregister_sensors(bridge);
+err_unregister_ipu:
+	software_node_unregister(&bridge->ipu_hid_node);
+err_free_bridge:
+	kfree(bridge);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(ipu_bridge_init, "INTEL_IPU_BRIDGE");
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Intel IPU Sensors Bridge driver");

linux-7.2.3/drivers/media/pci/intel/ipu3/Kconfig

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config VIDEO_IPU3_CIO2
+	tristate "Intel ipu3-cio2 driver"
+	depends on VIDEO_DEV && PCI
+	depends on IPU_BRIDGE || !IPU_BRIDGE
+	depends on ACPI || COMPILE_TEST
+	depends on X86
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	select V4L2_FWNODE
+	select VIDEOBUF2_DMA_SG
+
+	help
+	  This is the Intel IPU3 CIO2 CSI-2 receiver unit, found in Intel
+	  Skylake and Kaby Lake SoCs and used for capturing images and
+	  video from a camera sensor.
+
+	  Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2
+	  connected camera.
+	  The module will be called ipu3-cio2.

linux-7.2.3/drivers/media/pci/intel/ipu3/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_VIDEO_IPU3_CIO2) += ipu3-cio2.o

linux-7.2.3/drivers/media/pci/intel/ipu3/ipu3-cio2.h

@@ -0,0 +1,456 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2017 Intel Corporation */
+
+#ifndef __IPU3_CIO2_H
+#define __IPU3_CIO2_H
+
+#include <linux/bits.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+#include <asm/page.h>
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-v4l2.h>
+
+struct cio2_fbpt_entry;		/* defined here, after the first usage */
+struct pci_dev;
+
+#define CIO2_NAME					"ipu3-cio2"
+#define CIO2_DEVICE_NAME				"Intel IPU3 CIO2"
+#define CIO2_ENTITY_NAME				"ipu3-csi2"
+#define CIO2_PCI_ID					0x9d32
+#define CIO2_PCI_BAR					0
+#define CIO2_DMA_MASK					DMA_BIT_MASK(39)
+
+#define CIO2_IMAGE_MAX_WIDTH				4224U
+#define CIO2_IMAGE_MAX_HEIGHT				3136U
+
+/* 32MB = 8xFBPT_entry */
+#define CIO2_MAX_LOPS					8
+#define CIO2_MAX_BUFFERS			(PAGE_SIZE / 16 / CIO2_MAX_LOPS)
+#define CIO2_LOP_ENTRIES			(PAGE_SIZE / sizeof(u32))
+
+#define CIO2_PAD_SINK					0U
+#define CIO2_PAD_SOURCE					1U
+#define CIO2_PADS					2U
+
+#define CIO2_NUM_DMA_CHAN				20U
+#define CIO2_NUM_PORTS					4U /* DPHYs */
+
+/* 1 for each sensor */
+#define CIO2_QUEUES					CIO2_NUM_PORTS
+
+/* Register and bit field definitions */
+#define CIO2_REG_PIPE_BASE(n)			((n) * 0x0400)	/* n = 0..3 */
+#define CIO2_REG_CSIRX_BASE				0x000
+#define CIO2_REG_MIPIBE_BASE				0x100
+#define CIO2_REG_PIXELGEN_BAS				0x200
+#define CIO2_REG_IRQCTRL_BASE				0x300
+#define CIO2_REG_GPREG_BASE				0x1000
+
+/* base register: CIO2_REG_PIPE_BASE(pipe) * CIO2_REG_CSIRX_BASE */
+#define CIO2_REG_CSIRX_ENABLE			(CIO2_REG_CSIRX_BASE + 0x0)
+#define CIO2_REG_CSIRX_NOF_ENABLED_LANES	(CIO2_REG_CSIRX_BASE + 0x4)
+#define CIO2_REG_CSIRX_SP_IF_CONFIG		(CIO2_REG_CSIRX_BASE + 0x10)
+#define CIO2_REG_CSIRX_LP_IF_CONFIG		(CIO2_REG_CSIRX_BASE + 0x14)
+#define CIO2_CSIRX_IF_CONFIG_FILTEROUT			0x00
+#define CIO2_CSIRX_IF_CONFIG_FILTEROUT_VC_INACTIVE	0x01
+#define CIO2_CSIRX_IF_CONFIG_PASS			0x02
+#define CIO2_CSIRX_IF_CONFIG_FLAG_ERROR			BIT(2)
+#define CIO2_REG_CSIRX_STATUS			(CIO2_REG_CSIRX_BASE + 0x18)
+#define CIO2_REG_CSIRX_STATUS_DLANE_HS		(CIO2_REG_CSIRX_BASE + 0x1c)
+#define CIO2_CSIRX_STATUS_DLANE_HS_MASK			0xff
+#define CIO2_REG_CSIRX_STATUS_DLANE_LP		(CIO2_REG_CSIRX_BASE + 0x20)
+#define CIO2_CSIRX_STATUS_DLANE_LP_MASK			0xffffff
+/* Termination enable and settle in 0.0625ns units, lane=0..3 or -1 for clock */
+#define CIO2_REG_CSIRX_DLY_CNT_TERMEN(lane) \
+				(CIO2_REG_CSIRX_BASE + 0x2c + 8 * (lane))
+#define CIO2_REG_CSIRX_DLY_CNT_SETTLE(lane) \
+				(CIO2_REG_CSIRX_BASE + 0x30 + 8 * (lane))
+/* base register: CIO2_REG_PIPE_BASE(pipe) * CIO2_REG_MIPIBE_BASE */
+#define CIO2_REG_MIPIBE_ENABLE		(CIO2_REG_MIPIBE_BASE + 0x0)
+#define CIO2_REG_MIPIBE_STATUS		(CIO2_REG_MIPIBE_BASE + 0x4)
+#define CIO2_REG_MIPIBE_COMP_FORMAT(vc) \
+				(CIO2_REG_MIPIBE_BASE + 0x8 + 0x4 * (vc))
+#define CIO2_REG_MIPIBE_FORCE_RAW8	(CIO2_REG_MIPIBE_BASE + 0x20)
+#define CIO2_REG_MIPIBE_FORCE_RAW8_ENABLE		BIT(0)
+#define CIO2_REG_MIPIBE_FORCE_RAW8_USE_TYPEID		BIT(1)
+#define CIO2_REG_MIPIBE_FORCE_RAW8_TYPEID_SHIFT		2U
+
+#define CIO2_REG_MIPIBE_IRQ_STATUS	(CIO2_REG_MIPIBE_BASE + 0x24)
+#define CIO2_REG_MIPIBE_IRQ_CLEAR	(CIO2_REG_MIPIBE_BASE + 0x28)
+#define CIO2_REG_MIPIBE_GLOBAL_LUT_DISREGARD (CIO2_REG_MIPIBE_BASE + 0x68)
+#define CIO2_MIPIBE_GLOBAL_LUT_DISREGARD		1U
+#define CIO2_REG_MIPIBE_PKT_STALL_STATUS (CIO2_REG_MIPIBE_BASE + 0x6c)
+#define CIO2_REG_MIPIBE_PARSE_GSP_THROUGH_LP_LUT_REG_IDX \
+					(CIO2_REG_MIPIBE_BASE + 0x70)
+#define CIO2_REG_MIPIBE_SP_LUT_ENTRY(vc) \
+				       (CIO2_REG_MIPIBE_BASE + 0x74 + 4 * (vc))
+#define CIO2_REG_MIPIBE_LP_LUT_ENTRY(m)	/* m = 0..15 */ \
+					(CIO2_REG_MIPIBE_BASE + 0x84 + 4 * (m))
+#define CIO2_MIPIBE_LP_LUT_ENTRY_DISREGARD		1U
+#define CIO2_MIPIBE_LP_LUT_ENTRY_SID_SHIFT		1U
+#define CIO2_MIPIBE_LP_LUT_ENTRY_VC_SHIFT		5U
+#define CIO2_MIPIBE_LP_LUT_ENTRY_FORMAT_TYPE_SHIFT	7U
+
+/* base register: CIO2_REG_PIPE_BASE(pipe) * CIO2_REG_IRQCTRL_BASE */
+/* IRQ registers are 18-bit wide, see cio2_irq_error for bit definitions */
+#define CIO2_REG_IRQCTRL_EDGE		(CIO2_REG_IRQCTRL_BASE + 0x00)
+#define CIO2_REG_IRQCTRL_MASK		(CIO2_REG_IRQCTRL_BASE + 0x04)
+#define CIO2_REG_IRQCTRL_STATUS		(CIO2_REG_IRQCTRL_BASE + 0x08)
+#define CIO2_REG_IRQCTRL_CLEAR		(CIO2_REG_IRQCTRL_BASE + 0x0c)
+#define CIO2_REG_IRQCTRL_ENABLE		(CIO2_REG_IRQCTRL_BASE + 0x10)
+#define CIO2_REG_IRQCTRL_LEVEL_NOT_PULSE	(CIO2_REG_IRQCTRL_BASE + 0x14)
+
+#define CIO2_REG_GPREG_SRST		(CIO2_REG_GPREG_BASE + 0x0)
+#define CIO2_GPREG_SRST_ALL				0xffff	/* Reset all */
+#define CIO2_REG_FB_HPLL_FREQ		(CIO2_REG_GPREG_BASE + 0x08)
+#define CIO2_REG_ISCLK_RATIO		(CIO2_REG_GPREG_BASE + 0xc)
+
+#define CIO2_REG_CGC					0x1400
+#define CIO2_CGC_CSI2_TGE				BIT(0)
+#define CIO2_CGC_PRIM_TGE				BIT(1)
+#define CIO2_CGC_SIDE_TGE				BIT(2)
+#define CIO2_CGC_XOSC_TGE				BIT(3)
+#define CIO2_CGC_MPLL_SHUTDOWN_EN			BIT(4)
+#define CIO2_CGC_D3I3_TGE				BIT(5)
+#define CIO2_CGC_CSI2_INTERFRAME_TGE			BIT(6)
+#define CIO2_CGC_CSI2_PORT_DCGE				BIT(8)
+#define CIO2_CGC_CSI2_DCGE				BIT(9)
+#define CIO2_CGC_SIDE_DCGE				BIT(10)
+#define CIO2_CGC_PRIM_DCGE				BIT(11)
+#define CIO2_CGC_ROSC_DCGE				BIT(12)
+#define CIO2_CGC_XOSC_DCGE				BIT(13)
+#define CIO2_CGC_FLIS_DCGE				BIT(14)
+#define CIO2_CGC_CLKGATE_HOLDOFF_SHIFT			20U
+#define CIO2_CGC_CSI_CLKGATE_HOLDOFF_SHIFT		24U
+#define CIO2_REG_D0I3C					0x1408
+#define CIO2_D0I3C_I3					BIT(2)	/* Set D0I3 */
+#define CIO2_D0I3C_RR					BIT(3)	/* Restore? */
+#define CIO2_REG_SWRESET				0x140c
+#define CIO2_SWRESET_SWRESET				1U
+#define CIO2_REG_SENSOR_ACTIVE				0x1410
+#define CIO2_REG_INT_STS				0x1414
+#define CIO2_REG_INT_STS_EXT_OE				0x1418
+#define CIO2_INT_EXT_OE_DMAOE_SHIFT			0U
+#define CIO2_INT_EXT_OE_DMAOE_MASK			0x7ffff
+#define CIO2_INT_EXT_OE_OES_SHIFT			24U
+#define CIO2_INT_EXT_OE_OES_MASK	(0xf << CIO2_INT_EXT_OE_OES_SHIFT)
+#define CIO2_REG_INT_EN					0x1420
+#define CIO2_REG_INT_EN_IRQ				(1 << 24)
+#define CIO2_REG_INT_EN_IOS(dma)	(1U << (((dma) >> 1U) + 12U))
+/*
+ * Interrupt on completion bit, Eg. DMA 0-3 maps to bit 0-3,
+ * DMA4 & DMA5 map to bit 4 ... DMA18 & DMA19 map to bit 11 Et cetera
+ */
+#define CIO2_INT_IOC(dma)	(1U << ((dma) < 4U ? (dma) : ((dma) >> 1U) + 2U))
+#define CIO2_INT_IOC_SHIFT				0
+#define CIO2_INT_IOC_MASK		(0x7ff << CIO2_INT_IOC_SHIFT)
+#define CIO2_INT_IOS_IOLN(dma)		(1U << (((dma) >> 1U) + 12U))
+#define CIO2_INT_IOS_IOLN_SHIFT				12
+#define CIO2_INT_IOS_IOLN_MASK		(0x3ff << CIO2_INT_IOS_IOLN_SHIFT)
+#define CIO2_INT_IOIE					BIT(22)
+#define CIO2_INT_IOOE					BIT(23)
+#define CIO2_INT_IOIRQ					BIT(24)
+#define CIO2_REG_INT_EN_EXT_OE				0x1424
+#define CIO2_REG_DMA_DBG				0x1448
+#define CIO2_REG_DMA_DBG_DMA_INDEX_SHIFT		0U
+#define CIO2_REG_PBM_ARB_CTRL				0x1460
+#define CIO2_PBM_ARB_CTRL_LANES_DIV			0U /* 4-4-2-2 lanes */
+#define CIO2_PBM_ARB_CTRL_LANES_DIV_SHIFT		0U
+#define CIO2_PBM_ARB_CTRL_LE_EN				BIT(7)
+#define CIO2_PBM_ARB_CTRL_PLL_POST_SHTDN		2U
+#define CIO2_PBM_ARB_CTRL_PLL_POST_SHTDN_SHIFT		8U
+#define CIO2_PBM_ARB_CTRL_PLL_AHD_WK_UP			480U
+#define CIO2_PBM_ARB_CTRL_PLL_AHD_WK_UP_SHIFT		16U
+#define CIO2_REG_PBM_WMCTRL1				0x1464
+#define CIO2_PBM_WMCTRL1_MIN_2CK_SHIFT			0U
+#define CIO2_PBM_WMCTRL1_MID1_2CK_SHIFT			8U
+#define CIO2_PBM_WMCTRL1_MID2_2CK_SHIFT			16U
+#define CIO2_PBM_WMCTRL1_TS_COUNT_DISABLE		BIT(31)
+#define CIO2_PBM_WMCTRL1_MIN_2CK	(4 << CIO2_PBM_WMCTRL1_MIN_2CK_SHIFT)
+#define CIO2_PBM_WMCTRL1_MID1_2CK	(16 << CIO2_PBM_WMCTRL1_MID1_2CK_SHIFT)
+#define CIO2_PBM_WMCTRL1_MID2_2CK	(21 << CIO2_PBM_WMCTRL1_MID2_2CK_SHIFT)
+#define CIO2_REG_PBM_WMCTRL2				0x1468
+#define CIO2_PBM_WMCTRL2_HWM_2CK			40U
+#define CIO2_PBM_WMCTRL2_HWM_2CK_SHIFT			0U
+#define CIO2_PBM_WMCTRL2_LWM_2CK			22U
+#define CIO2_PBM_WMCTRL2_LWM_2CK_SHIFT			8U
+#define CIO2_PBM_WMCTRL2_OBFFWM_2CK			2U
+#define CIO2_PBM_WMCTRL2_OBFFWM_2CK_SHIFT		16U
+#define CIO2_PBM_WMCTRL2_TRANSDYN			1U
+#define CIO2_PBM_WMCTRL2_TRANSDYN_SHIFT			24U
+#define CIO2_PBM_WMCTRL2_DYNWMEN			BIT(28)
+#define CIO2_PBM_WMCTRL2_OBFF_MEM_EN			BIT(29)
+#define CIO2_PBM_WMCTRL2_OBFF_CPU_EN			BIT(30)
+#define CIO2_PBM_WMCTRL2_DRAINNOW			BIT(31)
+#define CIO2_REG_PBM_TS_COUNT				0x146c
+#define CIO2_REG_PBM_FOPN_ABORT				0x1474
+/* below n = 0..3 */
+#define CIO2_PBM_FOPN_ABORT(n)				(0x1 << 8U * (n))
+#define CIO2_PBM_FOPN_FORCE_ABORT(n)			(0x2 << 8U * (n))
+#define CIO2_PBM_FOPN_FRAMEOPEN(n)			(0x8 << 8U * (n))
+#define CIO2_REG_LTRCTRL				0x1480
+#define CIO2_LTRCTRL_LTRDYNEN				BIT(16)
+#define CIO2_LTRCTRL_LTRSTABLETIME_SHIFT		8U
+#define CIO2_LTRCTRL_LTRSTABLETIME_MASK			0xff
+#define CIO2_LTRCTRL_LTRSEL1S3				BIT(7)
+#define CIO2_LTRCTRL_LTRSEL1S2				BIT(6)
+#define CIO2_LTRCTRL_LTRSEL1S1				BIT(5)
+#define CIO2_LTRCTRL_LTRSEL1S0				BIT(4)
+#define CIO2_LTRCTRL_LTRSEL2S3				BIT(3)
+#define CIO2_LTRCTRL_LTRSEL2S2				BIT(2)
+#define CIO2_LTRCTRL_LTRSEL2S1				BIT(1)
+#define CIO2_LTRCTRL_LTRSEL2S0				BIT(0)
+#define CIO2_REG_LTRVAL23				0x1484
+#define CIO2_REG_LTRVAL01				0x1488
+#define CIO2_LTRVAL02_VAL_SHIFT				0U
+#define CIO2_LTRVAL02_SCALE_SHIFT			10U
+#define CIO2_LTRVAL13_VAL_SHIFT				16U
+#define CIO2_LTRVAL13_SCALE_SHIFT			26U
+
+#define CIO2_LTRVAL0_VAL				175U
+/* Value times 1024 ns */
+#define CIO2_LTRVAL0_SCALE				2U
+#define CIO2_LTRVAL1_VAL				90U
+#define CIO2_LTRVAL1_SCALE				2U
+#define CIO2_LTRVAL2_VAL				90U
+#define CIO2_LTRVAL2_SCALE				2U
+#define CIO2_LTRVAL3_VAL				90U
+#define CIO2_LTRVAL3_SCALE				2U
+
+#define CIO2_REG_CDMABA(n)		(0x1500 + 0x10 * (n))	/* n = 0..19 */
+#define CIO2_REG_CDMARI(n)		(0x1504 + 0x10 * (n))
+#define CIO2_CDMARI_FBPT_RP_SHIFT			0U
+#define CIO2_CDMARI_FBPT_RP_MASK			0xff
+#define CIO2_REG_CDMAC0(n)		(0x1508 + 0x10 * (n))
+#define CIO2_CDMAC0_FBPT_LEN_SHIFT			0U
+#define CIO2_CDMAC0_FBPT_WIDTH_SHIFT			8U
+#define CIO2_CDMAC0_FBPT_NS				BIT(25)
+#define CIO2_CDMAC0_DMA_INTR_ON_FS			BIT(26)
+#define CIO2_CDMAC0_DMA_INTR_ON_FE			BIT(27)
+#define CIO2_CDMAC0_FBPT_UPDATE_FIFO_FULL		BIT(28)
+#define CIO2_CDMAC0_FBPT_FIFO_FULL_FIX_DIS		BIT(29)
+#define CIO2_CDMAC0_DMA_EN				BIT(30)
+#define CIO2_CDMAC0_DMA_HALTED				BIT(31)
+#define CIO2_REG_CDMAC1(n)		(0x150c + 0x10 * (n))
+#define CIO2_CDMAC1_LINENUMINT_SHIFT			0U
+#define CIO2_CDMAC1_LINENUMUPDATE_SHIFT			16U
+/* n = 0..3 */
+#define CIO2_REG_PXM_PXF_FMT_CFG0(n)	(0x1700 + 0x30 * (n))
+#define CIO2_PXM_PXF_FMT_CFG_SID0_SHIFT			0U
+#define CIO2_PXM_PXF_FMT_CFG_SID1_SHIFT			16U
+#define CIO2_PXM_PXF_FMT_CFG_PCK_64B			(0 << 0)
+#define CIO2_PXM_PXF_FMT_CFG_PCK_32B			(1 << 0)
+#define CIO2_PXM_PXF_FMT_CFG_BPP_08			(0 << 2)
+#define CIO2_PXM_PXF_FMT_CFG_BPP_10			(1 << 2)
+#define CIO2_PXM_PXF_FMT_CFG_BPP_12			(2 << 2)
+#define CIO2_PXM_PXF_FMT_CFG_BPP_14			(3 << 2)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_4PPC			(0 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_3PPC_RGBA		(1 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_3PPC_ARGB		(2 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_PLANAR2		(3 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_PLANAR3		(4 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_SPEC_NV16			(5 << 4)
+#define CIO2_PXM_PXF_FMT_CFG_PSWAP4_1ST_AB		(1 << 7)
+#define CIO2_PXM_PXF_FMT_CFG_PSWAP4_1ST_CD		(1 << 8)
+#define CIO2_PXM_PXF_FMT_CFG_PSWAP4_2ND_AC		(1 << 9)
+#define CIO2_PXM_PXF_FMT_CFG_PSWAP4_2ND_BD		(1 << 10)
+#define CIO2_REG_INT_STS_EXT_IE				0x17e4
+#define CIO2_REG_INT_EN_EXT_IE				0x17e8
+#define CIO2_INT_EXT_IE_ECC_RE(n)			(0x01 << (8U * (n)))
+#define CIO2_INT_EXT_IE_DPHY_NR(n)			(0x02 << (8U * (n)))
+#define CIO2_INT_EXT_IE_ECC_NR(n)			(0x04 << (8U * (n)))
+#define CIO2_INT_EXT_IE_CRCERR(n)			(0x08 << (8U * (n)))
+#define CIO2_INT_EXT_IE_INTERFRAMEDATA(n)		(0x10 << (8U * (n)))
+#define CIO2_INT_EXT_IE_PKT2SHORT(n)			(0x20 << (8U * (n)))
+#define CIO2_INT_EXT_IE_PKT2LONG(n)			(0x40 << (8U * (n)))
+#define CIO2_INT_EXT_IE_IRQ(n)				(0x80 << (8U * (n)))
+#define CIO2_REG_PXM_FRF_CFG(n)				(0x1720 + 0x30 * (n))
+#define CIO2_PXM_FRF_CFG_FNSEL				BIT(0)
+#define CIO2_PXM_FRF_CFG_FN_RST				BIT(1)
+#define CIO2_PXM_FRF_CFG_ABORT				BIT(2)
+#define CIO2_PXM_FRF_CFG_CRC_TH_SHIFT			3U
+#define CIO2_PXM_FRF_CFG_MSK_ECC_DPHY_NR		BIT(8)
+#define CIO2_PXM_FRF_CFG_MSK_ECC_RE			BIT(9)
+#define CIO2_PXM_FRF_CFG_MSK_ECC_DPHY_NE		BIT(10)
+#define CIO2_PXM_FRF_CFG_EVEN_ODD_MODE_SHIFT		11U
+#define CIO2_PXM_FRF_CFG_MASK_CRC_THRES			BIT(13)
+#define CIO2_PXM_FRF_CFG_MASK_CSI_ACCEPT		BIT(14)
+#define CIO2_PXM_FRF_CFG_CIOHC_FS_MODE			BIT(15)
+#define CIO2_PXM_FRF_CFG_CIOHC_FRST_FRM_SHIFT		16U
+#define CIO2_REG_PXM_SID2BID0(n)			(0x1724 + 0x30 * (n))
+#define CIO2_FB_HPLL_FREQ				0x2
+#define CIO2_ISCLK_RATIO				0xc
+
+#define CIO2_IRQCTRL_MASK				0x3ffff
+
+#define CIO2_INT_EN_EXT_OE_MASK				0x8f0fffff
+
+#define CIO2_CGC_CLKGATE_HOLDOFF			3U
+#define CIO2_CGC_CSI_CLKGATE_HOLDOFF			5U
+
+#define CIO2_PXM_FRF_CFG_CRC_TH				16
+
+#define CIO2_INT_EN_EXT_IE_MASK				0xffffffff
+
+#define CIO2_DMA_CHAN					0U
+
+#define CIO2_CSIRX_DLY_CNT_CLANE_IDX			-1
+
+#define CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_A		0
+#define CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_B		0
+#define CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_A		95
+#define CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_B		-8
+
+#define CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_A		0
+#define CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_B		0
+#define CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_A		85
+#define CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_B		-2
+
+#define CIO2_CSIRX_DLY_CNT_TERMEN_DEFAULT		0x4
+#define CIO2_CSIRX_DLY_CNT_SETTLE_DEFAULT		0x570
+
+struct cio2_csi2_timing {
+	s32 clk_termen;
+	s32 clk_settle;
+	s32 dat_termen;
+	s32 dat_settle;
+};
+
+struct cio2_buffer {
+	struct vb2_v4l2_buffer vbb;
+	u32 *lop[CIO2_MAX_LOPS];
+	dma_addr_t lop_bus_addr[CIO2_MAX_LOPS];
+	unsigned int offset;
+};
+
+#define to_cio2_buffer(vb)	container_of(vb, struct cio2_buffer, vbb.vb2_buf)
+
+struct csi2_bus_info {
+	u32 port;
+	u32 lanes;
+};
+
+struct cio2_queue {
+	/* mutex to be used by vb2_queue */
+	struct mutex lock;
+	struct media_pipeline pipe;
+	struct csi2_bus_info csi2;
+	struct v4l2_subdev *sensor;
+	void __iomem *csi_rx_base;
+
+	/* Subdev, /dev/v4l-subdevX */
+	struct v4l2_subdev subdev;
+	struct media_pad subdev_pads[CIO2_PADS];
+	atomic_t frame_sequence;
+
+	/* Video device, /dev/videoX */
+	struct video_device vdev;
+	struct media_pad vdev_pad;
+	struct v4l2_pix_format_mplane format;
+	struct vb2_queue vbq;
+
+	/* Buffer queue handling */
+	struct cio2_fbpt_entry *fbpt;	/* Frame buffer pointer table */
+	dma_addr_t fbpt_bus_addr;
+	struct cio2_buffer *bufs[CIO2_MAX_BUFFERS];
+	unsigned int bufs_first;	/* Index of the first used entry */
+	unsigned int bufs_next;	/* Index of the first unused entry */
+	atomic_t bufs_queued;
+};
+
+struct cio2_device {
+	struct pci_dev *pci_dev;
+	void __iomem *base;
+	struct v4l2_device v4l2_dev;
+	struct cio2_queue queue[CIO2_QUEUES];
+	struct cio2_queue *cur_queue;
+	/* mutex to be used by video_device */
+	struct mutex lock;
+
+	bool streaming;
+	struct v4l2_async_notifier notifier;
+	struct media_device media_dev;
+
+	/*
+	 * Safety net to catch DMA fetch ahead
+	 * when reaching the end of LOP
+	 */
+	void *dummy_page;
+	/* DMA handle of dummy_page */
+	dma_addr_t dummy_page_bus_addr;
+	/* single List of Pointers (LOP) page */
+	u32 *dummy_lop;
+	/* DMA handle of dummy_lop */
+	dma_addr_t dummy_lop_bus_addr;
+};
+
+#define to_cio2_device(n)	container_of(n, struct cio2_device, notifier)
+
+/**************** Virtual channel ****************/
+/*
+ * This should come from sensor driver. No
+ * driver interface nor requirement yet.
+ */
+#define SENSOR_VIR_CH_DFLT		0
+
+/**************** FBPT operations ****************/
+#define CIO2_FBPT_SIZE			(CIO2_MAX_BUFFERS * CIO2_MAX_LOPS * \
+					 sizeof(struct cio2_fbpt_entry))
+
+#define CIO2_FBPT_SUBENTRY_UNIT		4
+
+/* cio2 fbpt first_entry ctrl status */
+#define CIO2_FBPT_CTRL_VALID		BIT(0)
+#define CIO2_FBPT_CTRL_IOC		BIT(1)
+#define CIO2_FBPT_CTRL_IOS		BIT(2)
+#define CIO2_FBPT_CTRL_SUCCXFAIL	BIT(3)
+#define CIO2_FBPT_CTRL_CMPLCODE_SHIFT	4
+
+/*
+ * Frame Buffer Pointer Table(FBPT) entry
+ * each entry describe an output buffer and consists of
+ * several sub-entries
+ */
+struct __packed cio2_fbpt_entry {
+	union {
+		struct __packed {
+			u32 ctrl; /* status ctrl */
+			u16 cur_line_num; /* current line # written to DDR */
+			u16 frame_num; /* updated by DMA upon FE */
+			u32 first_page_offset; /* offset for 1st page in LOP */
+		} first_entry;
+		/* Second entry per buffer */
+		struct __packed {
+			u32 timestamp;
+			u32 num_of_bytes;
+			/* the number of bytes for write on last page */
+			u16 last_page_available_bytes;
+			/* the number of pages allocated for this buf */
+			u16 num_of_pages;
+		} second_entry;
+	};
+	u32 lop_page_addr;	/* Points to list of pointers (LOP) table */
+};
+
+static inline struct cio2_queue *file_to_cio2_queue(struct file *file)
+{
+	return container_of(video_devdata(file), struct cio2_queue, vdev);
+}
+
+static inline struct cio2_queue *vb2q_to_cio2_queue(struct vb2_queue *vq)
+{
+	return container_of(vq, struct cio2_queue, vbq);
+}
+
+#endif

linux-7.2.3/drivers/media/pci/intel/ipu6/Kconfig

@@ -0,0 +1,18 @@
+config VIDEO_INTEL_IPU6
+	tristate "Intel IPU6 driver"
+	depends on ACPI || COMPILE_TEST
+	depends on VIDEO_DEV
+	depends on X86 && HAS_DMA
+	depends on IPU_BRIDGE || !IPU_BRIDGE
+	select AUXILIARY_BUS
+	select IOMMU_IOVA
+	select VIDEO_V4L2_SUBDEV_API
+	select MEDIA_CONTROLLER
+	select VIDEOBUF2_DMA_SG
+	select V4L2_FWNODE
+	help
+	  This is the 6th Gen Intel Image Processing Unit, found in Intel SoCs
+	  and used for capturing images and video from camera sensors.
+
+	  To compile this driver, say Y here! It contains 2 modules -
+	  intel_ipu6 and intel_ipu6_isys.

linux-7.2.3/drivers/media/pci/intel/ipu6/Makefile

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+intel-ipu6-y			:= ipu6.o \
+				ipu6-bus.o \
+				ipu6-dma.o \
+				ipu6-mmu.o \
+				ipu6-buttress.o \
+				ipu6-cpd.o \
+				ipu6-fw-com.o
+
+obj-$(CONFIG_VIDEO_INTEL_IPU6)	+= intel-ipu6.o
+
+intel-ipu6-isys-y		:= ipu6-isys.o \
+				ipu6-isys-csi2.o \
+				ipu6-fw-isys.o \
+				ipu6-isys-video.o \
+				ipu6-isys-queue.o \
+				ipu6-isys-subdev.o \
+				ipu6-isys-mcd-phy.o \
+				ipu6-isys-jsl-phy.o \
+				ipu6-isys-dwc-phy.o
+
+obj-$(CONFIG_VIDEO_INTEL_IPU6)	+= intel-ipu6-isys.o

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-bus.c

@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 - 2024 Intel Corporation
+ */
+
+#include <linux/auxiliary_bus.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-buttress.h"
+#include "ipu6-dma.h"
+
+static int bus_pm_runtime_suspend(struct device *dev)
+{
+	struct ipu6_bus_device *adev = to_ipu6_bus_device(dev);
+	int ret;
+
+	ret = pm_generic_runtime_suspend(dev);
+	if (ret)
+		return ret;
+
+	ret = ipu6_buttress_power(dev, adev->ctrl, false);
+	if (!ret)
+		return 0;
+
+	dev_err(dev, "power down failed!\n");
+
+	/* Powering down failed, attempt to resume device now */
+	ret = pm_generic_runtime_resume(dev);
+	if (!ret)
+		return -EBUSY;
+
+	return -EIO;
+}
+
+static int bus_pm_runtime_resume(struct device *dev)
+{
+	struct ipu6_bus_device *adev = to_ipu6_bus_device(dev);
+	int ret;
+
+	ret = ipu6_buttress_power(dev, adev->ctrl, true);
+	if (ret)
+		return ret;
+
+	ret = pm_generic_runtime_resume(dev);
+	if (ret)
+		goto out_err;
+
+	return 0;
+
+out_err:
+	ipu6_buttress_power(dev, adev->ctrl, false);
+
+	return -EBUSY;
+}
+
+static struct dev_pm_domain ipu6_bus_pm_domain = {
+	.ops = {
+		.runtime_suspend = bus_pm_runtime_suspend,
+		.runtime_resume = bus_pm_runtime_resume,
+	},
+};
+
+static DEFINE_MUTEX(ipu6_bus_mutex);
+
+static void ipu6_bus_release(struct device *dev)
+{
+	struct ipu6_bus_device *adev = to_ipu6_bus_device(dev);
+
+	kfree(adev->pdata);
+	kfree(adev);
+}
+
+struct ipu6_bus_device *
+ipu6_bus_initialize_device(struct pci_dev *pdev, struct device *parent,
+			   void *pdata, const struct ipu6_buttress_ctrl *ctrl,
+			   char *name)
+{
+	struct auxiliary_device *auxdev;
+	struct ipu6_bus_device *adev;
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+	int ret;
+
+	adev = kzalloc_obj(*adev);
+	if (!adev)
+		return ERR_PTR(-ENOMEM);
+
+	adev->isp = isp;
+	adev->ctrl = ctrl;
+	adev->pdata = pdata;
+	auxdev = &adev->auxdev;
+	auxdev->name = name;
+	auxdev->id = (pci_domain_nr(pdev->bus) << 16) |
+		      PCI_DEVID(pdev->bus->number, pdev->devfn);
+
+	auxdev->dev.parent = parent;
+	auxdev->dev.release = ipu6_bus_release;
+
+	ret = auxiliary_device_init(auxdev);
+	if (ret < 0) {
+		dev_err(&isp->pdev->dev, "auxiliary device init failed (%d)\n",
+			ret);
+		kfree(adev);
+		return ERR_PTR(ret);
+	}
+
+	dev_pm_domain_set(&auxdev->dev, &ipu6_bus_pm_domain);
+
+	pm_runtime_forbid(&adev->auxdev.dev);
+	pm_runtime_enable(&adev->auxdev.dev);
+
+	return adev;
+}
+
+int ipu6_bus_add_device(struct ipu6_bus_device *adev)
+{
+	struct auxiliary_device *auxdev = &adev->auxdev;
+	int ret;
+
+	ret = auxiliary_device_add(auxdev);
+	if (ret) {
+		auxiliary_device_uninit(auxdev);
+		return ret;
+	}
+
+	mutex_lock(&ipu6_bus_mutex);
+	list_add(&adev->list, &adev->isp->devices);
+	mutex_unlock(&ipu6_bus_mutex);
+
+	pm_runtime_allow(&auxdev->dev);
+
+	return 0;
+}
+
+void ipu6_bus_del_devices(struct pci_dev *pdev)
+{
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+	struct ipu6_bus_device *adev, *save;
+
+	mutex_lock(&ipu6_bus_mutex);
+
+	list_for_each_entry_safe(adev, save, &isp->devices, list) {
+		pm_runtime_disable(&adev->auxdev.dev);
+		list_del(&adev->list);
+		auxiliary_device_delete(&adev->auxdev);
+		auxiliary_device_uninit(&adev->auxdev);
+	}
+
+	mutex_unlock(&ipu6_bus_mutex);
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-bus.h

@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013 - 2024 Intel Corporation */
+
+#ifndef IPU6_BUS_H
+#define IPU6_BUS_H
+
+#include <linux/auxiliary_bus.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
+#include <linux/irqreturn.h>
+#include <linux/list.h>
+#include <linux/scatterlist.h>
+#include <linux/types.h>
+
+struct firmware;
+struct pci_dev;
+
+struct ipu6_buttress_ctrl;
+
+struct ipu6_bus_device {
+	struct auxiliary_device auxdev;
+	const struct auxiliary_driver *auxdrv;
+	const struct ipu6_auxdrv_data *auxdrv_data;
+	struct list_head list;
+	void *pdata;
+	struct ipu6_mmu *mmu;
+	struct ipu6_device *isp;
+	const struct ipu6_buttress_ctrl *ctrl;
+	const struct firmware *fw;
+	struct sg_table fw_sgt;
+	u64 *pkg_dir;
+	dma_addr_t pkg_dir_dma_addr;
+	unsigned int pkg_dir_size;
+};
+
+struct ipu6_auxdrv_data {
+	irqreturn_t (*isr)(struct ipu6_bus_device *adev);
+	irqreturn_t (*isr_threaded)(struct ipu6_bus_device *adev);
+	bool wake_isr_thread;
+};
+
+#define to_ipu6_bus_device(_dev) \
+	container_of(to_auxiliary_dev(_dev), struct ipu6_bus_device, auxdev)
+#define auxdev_to_adev(_auxdev) \
+	container_of(_auxdev, struct ipu6_bus_device, auxdev)
+#define ipu6_bus_get_drvdata(adev) dev_get_drvdata(&(adev)->auxdev.dev)
+
+struct ipu6_bus_device *
+ipu6_bus_initialize_device(struct pci_dev *pdev, struct device *parent,
+			   void *pdata, const struct ipu6_buttress_ctrl *ctrl,
+			   char *name);
+int ipu6_bus_add_device(struct ipu6_bus_device *adev);
+void ipu6_bus_del_devices(struct pci_dev *pdev);
+
+#endif

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-buttress.c

@@ -0,0 +1,910 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/pfn.h>
+#include <linux/pm_runtime.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/time64.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-dma.h"
+#include "ipu6-buttress.h"
+#include "ipu6-platform-buttress-regs.h"
+
+#define BOOTLOADER_STATUS_OFFSET       0x15c
+
+#define BOOTLOADER_MAGIC_KEY		0xb00710ad
+
+#define ENTRY	BUTTRESS_IU2CSECSR_IPC_PEER_COMP_ACTIONS_RST_PHASE1
+#define EXIT	BUTTRESS_IU2CSECSR_IPC_PEER_COMP_ACTIONS_RST_PHASE2
+#define QUERY	BUTTRESS_IU2CSECSR_IPC_PEER_QUERIED_IP_COMP_ACTIONS_RST_PHASE
+
+#define BUTTRESS_TSC_SYNC_RESET_TRIAL_MAX	10
+
+#define BUTTRESS_POWER_TIMEOUT_US		(200 * USEC_PER_MSEC)
+
+#define BUTTRESS_CSE_BOOTLOAD_TIMEOUT_US	(5 * USEC_PER_SEC)
+#define BUTTRESS_CSE_AUTHENTICATE_TIMEOUT_US	(10 * USEC_PER_SEC)
+#define BUTTRESS_CSE_FWRESET_TIMEOUT_US		(100 * USEC_PER_MSEC)
+
+#define BUTTRESS_IPC_TX_TIMEOUT_MS		MSEC_PER_SEC
+#define BUTTRESS_IPC_RX_TIMEOUT_MS		MSEC_PER_SEC
+#define BUTTRESS_IPC_VALIDITY_TIMEOUT_US	(1 * USEC_PER_SEC)
+#define BUTTRESS_TSC_SYNC_TIMEOUT_US		(5 * USEC_PER_MSEC)
+
+#define BUTTRESS_IPC_RESET_RETRY		2000
+#define BUTTRESS_CSE_IPC_RESET_RETRY	4
+#define BUTTRESS_IPC_CMD_SEND_RETRY	1
+
+#define BUTTRESS_MAX_CONSECUTIVE_IRQS	100
+
+static const u32 ipu6_adev_irq_mask[2] = {
+	BUTTRESS_ISR_IS_IRQ,
+	BUTTRESS_ISR_PS_IRQ
+};
+
+int ipu6_buttress_ipc_reset(struct ipu6_device *isp,
+			    struct ipu6_buttress_ipc *ipc)
+{
+	unsigned int retries = BUTTRESS_IPC_RESET_RETRY;
+	struct ipu6_buttress *b = &isp->buttress;
+	u32 val = 0, csr_in_clr;
+
+	if (!isp->secure_mode) {
+		dev_dbg(&isp->pdev->dev, "Skip IPC reset for non-secure mode");
+		return 0;
+	}
+
+	mutex_lock(&b->ipc_mutex);
+
+	/* Clear-by-1 CSR (all bits), corresponding internal states. */
+	val = readl(isp->base + ipc->csr_in);
+	writel(val, isp->base + ipc->csr_in);
+
+	/* Set peer CSR bit IPC_PEER_COMP_ACTIONS_RST_PHASE1 */
+	writel(ENTRY, isp->base + ipc->csr_out);
+	/*
+	 * Clear-by-1 all CSR bits EXCEPT following
+	 * bits:
+	 * A. IPC_PEER_COMP_ACTIONS_RST_PHASE1.
+	 * B. IPC_PEER_COMP_ACTIONS_RST_PHASE2.
+	 * C. Possibly custom bits, depending on
+	 * their role.
+	 */
+	csr_in_clr = BUTTRESS_IU2CSECSR_IPC_PEER_DEASSERTED_REG_VALID_REQ |
+		BUTTRESS_IU2CSECSR_IPC_PEER_ACKED_REG_VALID |
+		BUTTRESS_IU2CSECSR_IPC_PEER_ASSERTED_REG_VALID_REQ | QUERY;
+
+	do {
+		usleep_range(400, 500);
+		val = readl(isp->base + ipc->csr_in);
+		switch (val) {
+		case ENTRY | EXIT:
+		case ENTRY | EXIT | QUERY:
+			/*
+			 * 1) Clear-by-1 CSR bits
+			 * (IPC_PEER_COMP_ACTIONS_RST_PHASE1,
+			 * IPC_PEER_COMP_ACTIONS_RST_PHASE2).
+			 * 2) Set peer CSR bit
+			 * IPC_PEER_QUERIED_IP_COMP_ACTIONS_RST_PHASE.
+			 */
+			writel(ENTRY | EXIT, isp->base + ipc->csr_in);
+			writel(QUERY, isp->base + ipc->csr_out);
+			break;
+		case ENTRY:
+		case ENTRY | QUERY:
+			/*
+			 * 1) Clear-by-1 CSR bits
+			 * (IPC_PEER_COMP_ACTIONS_RST_PHASE1,
+			 * IPC_PEER_QUERIED_IP_COMP_ACTIONS_RST_PHASE).
+			 * 2) Set peer CSR bit
+			 * IPC_PEER_COMP_ACTIONS_RST_PHASE1.
+			 */
+			writel(ENTRY | QUERY, isp->base + ipc->csr_in);
+			writel(ENTRY, isp->base + ipc->csr_out);
+			break;
+		case EXIT:
+		case EXIT | QUERY:
+			/*
+			 * Clear-by-1 CSR bit
+			 * IPC_PEER_COMP_ACTIONS_RST_PHASE2.
+			 * 1) Clear incoming doorbell.
+			 * 2) Clear-by-1 all CSR bits EXCEPT following
+			 * bits:
+			 * A. IPC_PEER_COMP_ACTIONS_RST_PHASE1.
+			 * B. IPC_PEER_COMP_ACTIONS_RST_PHASE2.
+			 * C. Possibly custom bits, depending on
+			 * their role.
+			 * 3) Set peer CSR bit
+			 * IPC_PEER_COMP_ACTIONS_RST_PHASE2.
+			 */
+			writel(EXIT, isp->base + ipc->csr_in);
+			writel(0, isp->base + ipc->db0_in);
+			writel(csr_in_clr, isp->base + ipc->csr_in);
+			writel(EXIT, isp->base + ipc->csr_out);
+
+			/*
+			 * Read csr_in again to make sure if RST_PHASE2 is done.
+			 * If csr_in is QUERY, it should be handled again.
+			 */
+			usleep_range(200, 300);
+			val = readl(isp->base + ipc->csr_in);
+			if (val & QUERY) {
+				dev_dbg(&isp->pdev->dev,
+					"RST_PHASE2 retry csr_in = %x\n", val);
+				break;
+			}
+			mutex_unlock(&b->ipc_mutex);
+			return 0;
+		case QUERY:
+			/*
+			 * 1) Clear-by-1 CSR bit
+			 * IPC_PEER_QUERIED_IP_COMP_ACTIONS_RST_PHASE.
+			 * 2) Set peer CSR bit
+			 * IPC_PEER_COMP_ACTIONS_RST_PHASE1
+			 */
+			writel(QUERY, isp->base + ipc->csr_in);
+			writel(ENTRY, isp->base + ipc->csr_out);
+			break;
+		default:
+			dev_dbg_ratelimited(&isp->pdev->dev,
+					    "Unexpected CSR 0x%x\n", val);
+			break;
+		}
+	} while (retries--);
+
+	mutex_unlock(&b->ipc_mutex);
+	dev_err(&isp->pdev->dev, "Timed out while waiting for CSE\n");
+
+	return -ETIMEDOUT;
+}
+
+static void ipu6_buttress_ipc_validity_close(struct ipu6_device *isp,
+					     struct ipu6_buttress_ipc *ipc)
+{
+	writel(BUTTRESS_IU2CSECSR_IPC_PEER_DEASSERTED_REG_VALID_REQ,
+	       isp->base + ipc->csr_out);
+}
+
+static int
+ipu6_buttress_ipc_validity_open(struct ipu6_device *isp,
+				struct ipu6_buttress_ipc *ipc)
+{
+	unsigned int mask = BUTTRESS_IU2CSECSR_IPC_PEER_ACKED_REG_VALID;
+	void __iomem *addr;
+	int ret;
+	u32 val;
+
+	writel(BUTTRESS_IU2CSECSR_IPC_PEER_ASSERTED_REG_VALID_REQ,
+	       isp->base + ipc->csr_out);
+
+	addr = isp->base + ipc->csr_in;
+	ret = readl_poll_timeout(addr, val, val & mask, 200,
+				 BUTTRESS_IPC_VALIDITY_TIMEOUT_US);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "CSE validity timeout 0x%x\n", val);
+		ipu6_buttress_ipc_validity_close(isp, ipc);
+	}
+
+	return ret;
+}
+
+static void ipu6_buttress_ipc_recv(struct ipu6_device *isp,
+				   struct ipu6_buttress_ipc *ipc, u32 *ipc_msg)
+{
+	if (ipc_msg)
+		*ipc_msg = readl(isp->base + ipc->data0_in);
+	writel(0, isp->base + ipc->db0_in);
+}
+
+static int ipu6_buttress_ipc_send_bulk(struct ipu6_device *isp,
+				       struct ipu6_ipc_buttress_bulk_msg *msgs,
+				       u32 size)
+{
+	unsigned long tx_timeout_jiffies, rx_timeout_jiffies;
+	unsigned int i, retry = BUTTRESS_IPC_CMD_SEND_RETRY;
+	struct ipu6_buttress *b = &isp->buttress;
+	struct ipu6_buttress_ipc *ipc = &b->cse;
+	u32 val;
+	int ret;
+	int tout;
+
+	mutex_lock(&b->ipc_mutex);
+
+	ret = ipu6_buttress_ipc_validity_open(isp, ipc);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "IPC validity open failed\n");
+		goto out;
+	}
+
+	tx_timeout_jiffies = msecs_to_jiffies(BUTTRESS_IPC_TX_TIMEOUT_MS);
+	rx_timeout_jiffies = msecs_to_jiffies(BUTTRESS_IPC_RX_TIMEOUT_MS);
+
+	for (i = 0; i < size; i++) {
+		reinit_completion(&ipc->send_complete);
+		if (msgs[i].require_resp)
+			reinit_completion(&ipc->recv_complete);
+
+		dev_dbg(&isp->pdev->dev, "bulk IPC command: 0x%x\n",
+			msgs[i].cmd);
+		writel(msgs[i].cmd, isp->base + ipc->data0_out);
+		val = BUTTRESS_IU2CSEDB0_BUSY | msgs[i].cmd_size;
+		writel(val, isp->base + ipc->db0_out);
+
+		tout = wait_for_completion_timeout(&ipc->send_complete,
+						   tx_timeout_jiffies);
+		if (!tout) {
+			dev_err(&isp->pdev->dev, "send IPC response timeout\n");
+			if (!retry--) {
+				ret = -ETIMEDOUT;
+				goto out;
+			}
+
+			/* Try again if CSE is not responding on first try */
+			writel(0, isp->base + ipc->db0_out);
+			i--;
+			continue;
+		}
+
+		retry = BUTTRESS_IPC_CMD_SEND_RETRY;
+
+		if (!msgs[i].require_resp)
+			continue;
+
+		tout = wait_for_completion_timeout(&ipc->recv_complete,
+						   rx_timeout_jiffies);
+		if (!tout) {
+			dev_err(&isp->pdev->dev, "recv IPC response timeout\n");
+			ret = -ETIMEDOUT;
+			goto out;
+		}
+
+		if (ipc->nack_mask &&
+		    (ipc->recv_data & ipc->nack_mask) == ipc->nack) {
+			dev_err(&isp->pdev->dev,
+				"IPC NACK for cmd 0x%x\n", msgs[i].cmd);
+			ret = -EIO;
+			goto out;
+		}
+
+		if (ipc->recv_data != msgs[i].expected_resp) {
+			dev_err(&isp->pdev->dev,
+				"expected resp: 0x%x, IPC response: 0x%x ",
+				msgs[i].expected_resp, ipc->recv_data);
+			ret = -EIO;
+			goto out;
+		}
+	}
+
+	dev_dbg(&isp->pdev->dev, "bulk IPC commands done\n");
+
+out:
+	ipu6_buttress_ipc_validity_close(isp, ipc);
+	mutex_unlock(&b->ipc_mutex);
+	return ret;
+}
+
+static int
+ipu6_buttress_ipc_send(struct ipu6_device *isp,
+		       u32 ipc_msg, u32 size, bool require_resp,
+		       u32 expected_resp)
+{
+	struct ipu6_ipc_buttress_bulk_msg msg = {
+		.cmd = ipc_msg,
+		.cmd_size = size,
+		.require_resp = require_resp,
+		.expected_resp = expected_resp,
+	};
+
+	return ipu6_buttress_ipc_send_bulk(isp, &msg, 1);
+}
+
+static irqreturn_t ipu6_buttress_call_isr(struct ipu6_bus_device *adev)
+{
+	irqreturn_t ret = IRQ_WAKE_THREAD;
+
+	if (!adev || !adev->auxdrv || !adev->auxdrv_data)
+		return IRQ_NONE;
+
+	if (adev->auxdrv_data->isr)
+		ret = adev->auxdrv_data->isr(adev);
+
+	if (ret == IRQ_WAKE_THREAD && !adev->auxdrv_data->isr_threaded)
+		ret = IRQ_NONE;
+
+	return ret;
+}
+
+irqreturn_t ipu6_buttress_isr(int irq, void *isp_ptr)
+{
+	struct ipu6_device *isp = isp_ptr;
+	struct ipu6_bus_device *adev[] = { isp->isys, isp->psys };
+	struct ipu6_buttress *b = &isp->buttress;
+	u32 reg_irq_sts = BUTTRESS_REG_ISR_STATUS;
+	irqreturn_t ret = IRQ_NONE;
+	u32 disable_irqs = 0;
+	u32 irq_status;
+	u32 i, count = 0;
+	int active;
+
+	active = pm_runtime_get_if_active(&isp->pdev->dev);
+	if (!active)
+		return IRQ_NONE;
+
+	irq_status = readl(isp->base + reg_irq_sts);
+	if (irq_status == 0 || WARN_ON_ONCE(irq_status == 0xffffffffu)) {
+		if (active > 0)
+			pm_runtime_put_noidle(&isp->pdev->dev);
+		return IRQ_NONE;
+	}
+
+	do {
+		writel(irq_status, isp->base + BUTTRESS_REG_ISR_CLEAR);
+
+		for (i = 0; i < ARRAY_SIZE(ipu6_adev_irq_mask); i++) {
+			irqreturn_t r = ipu6_buttress_call_isr(adev[i]);
+
+			if (!(irq_status & ipu6_adev_irq_mask[i]))
+				continue;
+
+			if (r == IRQ_WAKE_THREAD) {
+				ret = IRQ_WAKE_THREAD;
+				disable_irqs |= ipu6_adev_irq_mask[i];
+			} else if (ret == IRQ_NONE && r == IRQ_HANDLED) {
+				ret = IRQ_HANDLED;
+			}
+		}
+
+		if ((irq_status & BUTTRESS_EVENT) && ret == IRQ_NONE)
+			ret = IRQ_HANDLED;
+
+		if (irq_status & BUTTRESS_ISR_IPC_FROM_CSE_IS_WAITING) {
+			dev_dbg(&isp->pdev->dev,
+				"BUTTRESS_ISR_IPC_FROM_CSE_IS_WAITING\n");
+			ipu6_buttress_ipc_recv(isp, &b->cse, &b->cse.recv_data);
+			complete(&b->cse.recv_complete);
+		}
+
+		if (irq_status & BUTTRESS_ISR_IPC_EXEC_DONE_BY_CSE) {
+			dev_dbg(&isp->pdev->dev,
+				"BUTTRESS_ISR_IPC_EXEC_DONE_BY_CSE\n");
+			complete(&b->cse.send_complete);
+		}
+
+		if (irq_status & BUTTRESS_ISR_SAI_VIOLATION &&
+		    ipu6_buttress_get_secure_mode(isp))
+			dev_err(&isp->pdev->dev,
+				"BUTTRESS_ISR_SAI_VIOLATION\n");
+
+		if (irq_status & (BUTTRESS_ISR_IS_FATAL_MEM_ERR |
+				  BUTTRESS_ISR_PS_FATAL_MEM_ERR))
+			dev_err(&isp->pdev->dev,
+				"BUTTRESS_ISR_FATAL_MEM_ERR\n");
+
+		if (irq_status & BUTTRESS_ISR_UFI_ERROR)
+			dev_err(&isp->pdev->dev, "BUTTRESS_ISR_UFI_ERROR\n");
+
+		if (++count == BUTTRESS_MAX_CONSECUTIVE_IRQS) {
+			dev_err(&isp->pdev->dev, "too many consecutive IRQs\n");
+			ret = IRQ_NONE;
+			break;
+		}
+
+		irq_status = readl(isp->base + reg_irq_sts);
+	} while (irq_status);
+
+	if (disable_irqs)
+		writel(BUTTRESS_IRQS & ~disable_irqs,
+		       isp->base + BUTTRESS_REG_ISR_ENABLE);
+
+	if (active > 0)
+		pm_runtime_put(&isp->pdev->dev);
+
+	return ret;
+}
+
+irqreturn_t ipu6_buttress_isr_threaded(int irq, void *isp_ptr)
+{
+	struct ipu6_device *isp = isp_ptr;
+	struct ipu6_bus_device *adev[] = { isp->isys, isp->psys };
+	const struct ipu6_auxdrv_data *drv_data = NULL;
+	irqreturn_t ret = IRQ_NONE;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(ipu6_adev_irq_mask) && adev[i]; i++) {
+		drv_data = adev[i]->auxdrv_data;
+		if (!drv_data)
+			continue;
+
+		if (drv_data->wake_isr_thread &&
+		    drv_data->isr_threaded(adev[i]) == IRQ_HANDLED)
+			ret = IRQ_HANDLED;
+	}
+
+	writel(BUTTRESS_IRQS, isp->base + BUTTRESS_REG_ISR_ENABLE);
+
+	return ret;
+}
+
+int ipu6_buttress_power(struct device *dev,
+			const struct ipu6_buttress_ctrl *ctrl, bool on)
+{
+	struct ipu6_device *isp = to_ipu6_bus_device(dev)->isp;
+	u32 pwr_sts, val;
+	int ret;
+
+	if (!ctrl)
+		return 0;
+
+	mutex_lock(&isp->buttress.power_mutex);
+
+	if (!on) {
+		val = 0;
+		pwr_sts = ctrl->pwr_sts_off << ctrl->pwr_sts_shift;
+	} else {
+		val = BUTTRESS_FREQ_CTL_START |
+			FIELD_PREP(BUTTRESS_FREQ_CTL_RATIO_MASK,
+				   ctrl->ratio) |
+			FIELD_PREP(BUTTRESS_FREQ_CTL_QOS_FLOOR_MASK,
+				   ctrl->qos_floor) |
+			BUTTRESS_FREQ_CTL_ICCMAX_LEVEL;
+
+		pwr_sts = ctrl->pwr_sts_on << ctrl->pwr_sts_shift;
+	}
+
+	writel(val, isp->base + ctrl->freq_ctl);
+
+	ret = readl_poll_timeout(isp->base + BUTTRESS_REG_PWR_STATE,
+				 val, (val & ctrl->pwr_sts_mask) == pwr_sts,
+				 100, BUTTRESS_POWER_TIMEOUT_US);
+	if (ret)
+		dev_err(&isp->pdev->dev,
+			"Change power status timeout with 0x%x\n", val);
+
+	mutex_unlock(&isp->buttress.power_mutex);
+
+	return ret;
+}
+
+bool ipu6_buttress_get_secure_mode(struct ipu6_device *isp)
+{
+	u32 val;
+
+	val = readl(isp->base + BUTTRESS_REG_SECURITY_CTL);
+
+	return val & BUTTRESS_SECURITY_CTL_FW_SECURE_MODE;
+}
+
+bool ipu6_buttress_auth_done(struct ipu6_device *isp)
+{
+	u32 val;
+
+	if (!isp->secure_mode)
+		return true;
+
+	val = readl(isp->base + BUTTRESS_REG_SECURITY_CTL);
+	val = FIELD_GET(BUTTRESS_SECURITY_CTL_FW_SETUP_MASK, val);
+
+	return val == BUTTRESS_SECURITY_CTL_AUTH_DONE;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_auth_done, "INTEL_IPU6");
+
+int ipu6_buttress_reset_authentication(struct ipu6_device *isp)
+{
+	int ret;
+	u32 val;
+
+	if (!isp->secure_mode) {
+		dev_dbg(&isp->pdev->dev, "Skip auth for non-secure mode\n");
+		return 0;
+	}
+
+	writel(BUTTRESS_FW_RESET_CTL_START, isp->base +
+	       BUTTRESS_REG_FW_RESET_CTL);
+
+	ret = readl_poll_timeout(isp->base + BUTTRESS_REG_FW_RESET_CTL, val,
+				 val & BUTTRESS_FW_RESET_CTL_DONE, 500,
+				 BUTTRESS_CSE_FWRESET_TIMEOUT_US);
+	if (ret) {
+		dev_err(&isp->pdev->dev,
+			"Time out while resetting authentication state\n");
+		return ret;
+	}
+
+	dev_dbg(&isp->pdev->dev, "FW reset for authentication done\n");
+	writel(0, isp->base + BUTTRESS_REG_FW_RESET_CTL);
+	/* leave some time for HW restore */
+	usleep_range(800, 1000);
+
+	return 0;
+}
+
+int ipu6_buttress_map_fw_image(struct ipu6_bus_device *sys,
+			       const struct firmware *fw, struct sg_table *sgt)
+{
+	bool is_vmalloc = is_vmalloc_addr(fw->data);
+	struct pci_dev *pdev = sys->isp->pdev;
+	struct page **pages;
+	const void *addr;
+	unsigned long n_pages;
+	unsigned int i;
+	int ret;
+
+	if (!is_vmalloc && !virt_addr_valid(fw->data))
+		return -EDOM;
+
+	n_pages = PFN_UP(fw->size);
+
+	pages = kmalloc_objs(*pages, n_pages);
+	if (!pages)
+		return -ENOMEM;
+
+	addr = fw->data;
+	for (i = 0; i < n_pages; i++) {
+		struct page *p = is_vmalloc ?
+			vmalloc_to_page(addr) : virt_to_page(addr);
+
+		if (!p) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		pages[i] = p;
+		addr += PAGE_SIZE;
+	}
+
+	ret = sg_alloc_table_from_pages(sgt, pages, n_pages, 0, fw->size,
+					GFP_KERNEL);
+	if (ret) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	ret = dma_map_sgtable(&pdev->dev, sgt, DMA_TO_DEVICE, 0);
+	if (ret) {
+		sg_free_table(sgt);
+		goto out;
+	}
+
+	ret = ipu6_dma_map_sgtable(sys, sgt, DMA_TO_DEVICE, 0);
+	if (ret) {
+		dma_unmap_sgtable(&pdev->dev, sgt, DMA_TO_DEVICE, 0);
+		sg_free_table(sgt);
+		goto out;
+	}
+
+	ipu6_dma_sync_sgtable(sys, sgt);
+
+out:
+	kfree(pages);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_map_fw_image, "INTEL_IPU6");
+
+void ipu6_buttress_unmap_fw_image(struct ipu6_bus_device *sys,
+				  struct sg_table *sgt)
+{
+	struct pci_dev *pdev = sys->isp->pdev;
+
+	ipu6_dma_unmap_sgtable(sys, sgt, DMA_TO_DEVICE, 0);
+	dma_unmap_sgtable(&pdev->dev, sgt, DMA_TO_DEVICE, 0);
+	sg_free_table(sgt);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_unmap_fw_image, "INTEL_IPU6");
+
+int ipu6_buttress_authenticate(struct ipu6_device *isp)
+{
+	struct ipu6_buttress *b = &isp->buttress;
+	struct ipu6_psys_pdata *psys_pdata;
+	u32 data, mask, done, fail;
+	int ret;
+
+	if (!isp->secure_mode) {
+		dev_dbg(&isp->pdev->dev, "Skip auth for non-secure mode\n");
+		return 0;
+	}
+
+	psys_pdata = isp->psys->pdata;
+
+	mutex_lock(&b->auth_mutex);
+
+	if (ipu6_buttress_auth_done(isp)) {
+		ret = 0;
+		goto out_unlock;
+	}
+
+	/*
+	 * Write address of FIT table to FW_SOURCE register
+	 * Let's use fw address. I.e. not using FIT table yet
+	 */
+	data = lower_32_bits(isp->psys->pkg_dir_dma_addr);
+	writel(data, isp->base + BUTTRESS_REG_FW_SOURCE_BASE_LO);
+
+	data = upper_32_bits(isp->psys->pkg_dir_dma_addr);
+	writel(data, isp->base + BUTTRESS_REG_FW_SOURCE_BASE_HI);
+
+	/*
+	 * Write boot_load into IU2CSEDATA0
+	 * Write sizeof(boot_load) | 0x2 << CLIENT_ID to
+	 * IU2CSEDB.IU2CSECMD and set IU2CSEDB.IU2CSEBUSY as
+	 */
+	dev_info(&isp->pdev->dev, "Sending BOOT_LOAD to CSE\n");
+
+	ret = ipu6_buttress_ipc_send(isp,
+				     BUTTRESS_IU2CSEDATA0_IPC_BOOT_LOAD,
+				     1, true,
+				     BUTTRESS_CSE2IUDATA0_IPC_BOOT_LOAD_DONE);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "CSE boot_load failed\n");
+		goto out_unlock;
+	}
+
+	mask = BUTTRESS_SECURITY_CTL_FW_SETUP_MASK;
+	done = BUTTRESS_SECURITY_CTL_FW_SETUP_DONE;
+	fail = BUTTRESS_SECURITY_CTL_AUTH_FAILED;
+	ret = readl_poll_timeout(isp->base + BUTTRESS_REG_SECURITY_CTL, data,
+				 ((data & mask) == done ||
+				  (data & mask) == fail), 500,
+				 BUTTRESS_CSE_BOOTLOAD_TIMEOUT_US);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "CSE boot_load timeout\n");
+		goto out_unlock;
+	}
+
+	if ((data & mask) == fail) {
+		dev_err(&isp->pdev->dev, "CSE auth failed\n");
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	ret = readl_poll_timeout(psys_pdata->base + BOOTLOADER_STATUS_OFFSET,
+				 data, data == BOOTLOADER_MAGIC_KEY, 500,
+				 BUTTRESS_CSE_BOOTLOAD_TIMEOUT_US);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "Unexpected magic number 0x%x\n",
+			data);
+		goto out_unlock;
+	}
+
+	/*
+	 * Write authenticate_run into IU2CSEDATA0
+	 * Write sizeof(boot_load) | 0x2 << CLIENT_ID to
+	 * IU2CSEDB.IU2CSECMD and set IU2CSEDB.IU2CSEBUSY as
+	 */
+	dev_info(&isp->pdev->dev, "Sending AUTHENTICATE_RUN to CSE\n");
+	ret = ipu6_buttress_ipc_send(isp,
+				     BUTTRESS_IU2CSEDATA0_IPC_AUTH_RUN,
+				     1, true,
+				     BUTTRESS_CSE2IUDATA0_IPC_AUTH_RUN_DONE);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "CSE authenticate_run failed\n");
+		goto out_unlock;
+	}
+
+	done = BUTTRESS_SECURITY_CTL_AUTH_DONE;
+	ret = readl_poll_timeout(isp->base + BUTTRESS_REG_SECURITY_CTL, data,
+				 ((data & mask) == done ||
+				  (data & mask) == fail), 500,
+				 BUTTRESS_CSE_AUTHENTICATE_TIMEOUT_US);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "CSE authenticate timeout\n");
+		goto out_unlock;
+	}
+
+	if ((data & mask) == fail) {
+		dev_err(&isp->pdev->dev, "CSE boot_load failed\n");
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	dev_info(&isp->pdev->dev, "CSE authenticate_run done\n");
+
+out_unlock:
+	mutex_unlock(&b->auth_mutex);
+
+	return ret;
+}
+
+static int ipu6_buttress_send_tsc_request(struct ipu6_device *isp)
+{
+	u32 val, mask, done;
+	int ret;
+
+	mask = BUTTRESS_PWR_STATE_HH_STATUS_MASK;
+
+	writel(BUTTRESS_FABRIC_CMD_START_TSC_SYNC,
+	       isp->base + BUTTRESS_REG_FABRIC_CMD);
+
+	val = readl(isp->base + BUTTRESS_REG_PWR_STATE);
+	val = FIELD_GET(mask, val);
+	if (val == BUTTRESS_PWR_STATE_HH_STATE_ERR) {
+		dev_err(&isp->pdev->dev, "Start tsc sync failed\n");
+		return -EINVAL;
+	}
+
+	done = BUTTRESS_PWR_STATE_HH_STATE_DONE;
+	ret = readl_poll_timeout(isp->base + BUTTRESS_REG_PWR_STATE, val,
+				 FIELD_GET(mask, val) == done, 500,
+				 BUTTRESS_TSC_SYNC_TIMEOUT_US);
+	if (ret)
+		dev_err(&isp->pdev->dev, "Start tsc sync timeout\n");
+
+	return ret;
+}
+
+int ipu6_buttress_start_tsc_sync(struct ipu6_device *isp)
+{
+	unsigned int i;
+
+	for (i = 0; i < BUTTRESS_TSC_SYNC_RESET_TRIAL_MAX; i++) {
+		u32 val;
+		int ret;
+
+		ret = ipu6_buttress_send_tsc_request(isp);
+		if (ret != -ETIMEDOUT)
+			return ret;
+
+		val = readl(isp->base + BUTTRESS_REG_TSW_CTL);
+		val = val | BUTTRESS_TSW_CTL_SOFT_RESET;
+		writel(val, isp->base + BUTTRESS_REG_TSW_CTL);
+		val = val & ~BUTTRESS_TSW_CTL_SOFT_RESET;
+		writel(val, isp->base + BUTTRESS_REG_TSW_CTL);
+	}
+
+	dev_err(&isp->pdev->dev, "TSC sync failed (timeout)\n");
+
+	return -ETIMEDOUT;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_start_tsc_sync, "INTEL_IPU6");
+
+void ipu6_buttress_tsc_read(struct ipu6_device *isp, u64 *val)
+{
+	u32 tsc_hi_1, tsc_hi_2, tsc_lo;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	tsc_hi_1 = readl(isp->base + BUTTRESS_REG_TSC_HI);
+	tsc_lo = readl(isp->base + BUTTRESS_REG_TSC_LO);
+	tsc_hi_2 = readl(isp->base + BUTTRESS_REG_TSC_HI);
+	if (tsc_hi_1 == tsc_hi_2) {
+		*val = (u64)tsc_hi_1 << 32 | tsc_lo;
+	} else {
+		/* Check if TSC has rolled over */
+		if (tsc_lo & BIT(31))
+			*val = (u64)tsc_hi_1 << 32 | tsc_lo;
+		else
+			*val = (u64)tsc_hi_2 << 32 | tsc_lo;
+	}
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_tsc_read, "INTEL_IPU6");
+
+u64 ipu6_buttress_tsc_ticks_to_ns(u64 ticks, const struct ipu6_device *isp)
+{
+	u64 ns = ticks * 10000;
+
+	/*
+	 * converting TSC tick count to ns is calculated by:
+	 * Example (TSC clock frequency is 19.2MHz):
+	 * ns = ticks * 1000 000 000 / 19.2Mhz
+	 *    = ticks * 1000 000 000 / 19200000Hz
+	 *    = ticks * 10000 / 192 ns
+	 */
+	return div_u64(ns, isp->buttress.ref_clk);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_buttress_tsc_ticks_to_ns, "INTEL_IPU6");
+
+void ipu6_buttress_restore(struct ipu6_device *isp)
+{
+	struct ipu6_buttress *b = &isp->buttress;
+
+	writel(BUTTRESS_IRQS, isp->base + BUTTRESS_REG_ISR_CLEAR);
+	writel(BUTTRESS_IRQS, isp->base + BUTTRESS_REG_ISR_ENABLE);
+	writel(b->wdt_cached_value, isp->base + BUTTRESS_REG_WDT);
+}
+
+int ipu6_buttress_init(struct ipu6_device *isp)
+{
+	int ret, ipc_reset_retry = BUTTRESS_CSE_IPC_RESET_RETRY;
+	struct ipu6_buttress *b = &isp->buttress;
+	u32 val;
+
+	mutex_init(&b->power_mutex);
+	mutex_init(&b->auth_mutex);
+	mutex_init(&b->cons_mutex);
+	mutex_init(&b->ipc_mutex);
+	init_completion(&b->cse.send_complete);
+	init_completion(&b->cse.recv_complete);
+
+	b->cse.nack = BUTTRESS_CSE2IUDATA0_IPC_NACK;
+	b->cse.nack_mask = BUTTRESS_CSE2IUDATA0_IPC_NACK_MASK;
+	b->cse.csr_in = BUTTRESS_REG_CSE2IUCSR;
+	b->cse.csr_out = BUTTRESS_REG_IU2CSECSR;
+	b->cse.db0_in = BUTTRESS_REG_CSE2IUDB0;
+	b->cse.db0_out = BUTTRESS_REG_IU2CSEDB0;
+	b->cse.data0_in = BUTTRESS_REG_CSE2IUDATA0;
+	b->cse.data0_out = BUTTRESS_REG_IU2CSEDATA0;
+
+	INIT_LIST_HEAD(&b->constraints);
+
+	isp->secure_mode = ipu6_buttress_get_secure_mode(isp);
+	dev_dbg(&isp->pdev->dev, "IPU6 in %s mode touch 0x%x mask 0x%x\n",
+		isp->secure_mode ? "secure" : "non-secure",
+		readl(isp->base + BUTTRESS_REG_SECURITY_TOUCH),
+		readl(isp->base + BUTTRESS_REG_CAMERA_MASK));
+
+	b->wdt_cached_value = readl(isp->base + BUTTRESS_REG_WDT);
+	writel(BUTTRESS_IRQS, isp->base + BUTTRESS_REG_ISR_CLEAR);
+	writel(BUTTRESS_IRQS, isp->base + BUTTRESS_REG_ISR_ENABLE);
+
+	/* get ref_clk frequency by reading the indication in btrs control */
+	val = readl(isp->base + BUTTRESS_REG_BTRS_CTRL);
+	val = FIELD_GET(BUTTRESS_REG_BTRS_CTRL_REF_CLK_IND, val);
+
+	switch (val) {
+	case 0x0:
+		b->ref_clk = 240;
+		break;
+	case 0x1:
+		b->ref_clk = 192;
+		break;
+	case 0x2:
+		b->ref_clk = 384;
+		break;
+	default:
+		dev_warn(&isp->pdev->dev,
+			 "Unsupported ref clock, use 19.2Mhz by default.\n");
+		b->ref_clk = 192;
+		break;
+	}
+
+	/* Retry couple of times in case of CSE initialization is delayed */
+	do {
+		ret = ipu6_buttress_ipc_reset(isp, &b->cse);
+		if (ret) {
+			dev_warn(&isp->pdev->dev,
+				 "IPC reset protocol failed, retrying\n");
+		} else {
+			dev_dbg(&isp->pdev->dev, "IPC reset done\n");
+			return 0;
+		}
+	} while (ipc_reset_retry--);
+
+	dev_err(&isp->pdev->dev, "IPC reset protocol failed\n");
+
+	mutex_destroy(&b->power_mutex);
+	mutex_destroy(&b->auth_mutex);
+	mutex_destroy(&b->cons_mutex);
+	mutex_destroy(&b->ipc_mutex);
+
+	return ret;
+}
+
+void ipu6_buttress_exit(struct ipu6_device *isp)
+{
+	struct ipu6_buttress *b = &isp->buttress;
+
+	writel(0, isp->base + BUTTRESS_REG_ISR_ENABLE);
+
+	mutex_destroy(&b->power_mutex);
+	mutex_destroy(&b->auth_mutex);
+	mutex_destroy(&b->cons_mutex);
+	mutex_destroy(&b->ipc_mutex);
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-buttress.h

@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_BUTTRESS_H
+#define IPU6_BUTTRESS_H
+
+#include <linux/completion.h>
+#include <linux/irqreturn.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+
+struct device;
+struct firmware;
+struct ipu6_device;
+struct ipu6_bus_device;
+
+#define BUTTRESS_PS_FREQ_STEP		25U
+#define BUTTRESS_MIN_FORCE_PS_FREQ	(BUTTRESS_PS_FREQ_STEP * 8)
+#define BUTTRESS_MAX_FORCE_PS_FREQ	(BUTTRESS_PS_FREQ_STEP * 32)
+
+#define BUTTRESS_IS_FREQ_STEP		25U
+#define BUTTRESS_MIN_FORCE_IS_FREQ	(BUTTRESS_IS_FREQ_STEP * 8)
+#define BUTTRESS_MAX_FORCE_IS_FREQ	(BUTTRESS_IS_FREQ_STEP * 22)
+
+struct ipu6_buttress_ctrl {
+	u32 freq_ctl, pwr_sts_shift, pwr_sts_mask, pwr_sts_on, pwr_sts_off;
+	unsigned int ratio;
+	unsigned int qos_floor;
+};
+
+struct ipu6_buttress_ipc {
+	struct completion send_complete;
+	struct completion recv_complete;
+	u32 nack;
+	u32 nack_mask;
+	u32 recv_data;
+	u32 csr_out;
+	u32 csr_in;
+	u32 db0_in;
+	u32 db0_out;
+	u32 data0_out;
+	u32 data0_in;
+};
+
+struct ipu6_buttress {
+	struct mutex power_mutex, auth_mutex, cons_mutex, ipc_mutex;
+	struct ipu6_buttress_ipc cse;
+	struct list_head constraints;
+	u32 wdt_cached_value;
+	bool force_suspend;
+	u32 ref_clk;
+};
+
+struct ipu6_ipc_buttress_bulk_msg {
+	u32 cmd;
+	u32 expected_resp;
+	bool require_resp;
+	u8 cmd_size;
+};
+
+int ipu6_buttress_ipc_reset(struct ipu6_device *isp,
+			    struct ipu6_buttress_ipc *ipc);
+int ipu6_buttress_map_fw_image(struct ipu6_bus_device *sys,
+			       const struct firmware *fw,
+			       struct sg_table *sgt);
+void ipu6_buttress_unmap_fw_image(struct ipu6_bus_device *sys,
+				  struct sg_table *sgt);
+int ipu6_buttress_power(struct device *dev,
+			const struct ipu6_buttress_ctrl *ctrl, bool on);
+bool ipu6_buttress_get_secure_mode(struct ipu6_device *isp);
+int ipu6_buttress_authenticate(struct ipu6_device *isp);
+int ipu6_buttress_reset_authentication(struct ipu6_device *isp);
+bool ipu6_buttress_auth_done(struct ipu6_device *isp);
+int ipu6_buttress_start_tsc_sync(struct ipu6_device *isp);
+void ipu6_buttress_tsc_read(struct ipu6_device *isp, u64 *val);
+u64 ipu6_buttress_tsc_ticks_to_ns(u64 ticks, const struct ipu6_device *isp);
+
+irqreturn_t ipu6_buttress_isr(int irq, void *isp_ptr);
+irqreturn_t ipu6_buttress_isr_threaded(int irq, void *isp_ptr);
+int ipu6_buttress_init(struct ipu6_device *isp);
+void ipu6_buttress_exit(struct ipu6_device *isp);
+void ipu6_buttress_csi_port_config(struct ipu6_device *isp,
+				   u32 legacy, u32 combo);
+void ipu6_buttress_restore(struct ipu6_device *isp);
+#endif /* IPU6_BUTTRESS_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-cpd.c

@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/err.h>
+#include <linux/dma-mapping.h>
+#include <linux/gfp_types.h>
+#include <linux/math64.h>
+#include <linux/sizes.h>
+#include <linux/types.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-cpd.h"
+#include "ipu6-dma.h"
+
+/* 15 entries + header*/
+#define MAX_PKG_DIR_ENT_CNT		16
+/* 2 qword per entry/header */
+#define PKG_DIR_ENT_LEN			2
+/* PKG_DIR size in bytes */
+#define PKG_DIR_SIZE			((MAX_PKG_DIR_ENT_CNT) *	\
+					 (PKG_DIR_ENT_LEN) * sizeof(u64))
+/* _IUPKDR_ */
+#define PKG_DIR_HDR_MARK		0x5f4955504b44525fULL
+
+/* $CPD */
+#define CPD_HDR_MARK			0x44504324
+
+#define MAX_MANIFEST_SIZE		(SZ_2K * sizeof(u32))
+#define MAX_METADATA_SIZE		SZ_64K
+
+#define MAX_COMPONENT_ID		127
+#define MAX_COMPONENT_VERSION		0xffff
+
+#define MANIFEST_IDX	0
+#define METADATA_IDX	1
+#define MODULEDATA_IDX	2
+/*
+ * PKG_DIR Entry (type == id)
+ * 63:56        55      54:48   47:32   31:24   23:0
+ * Rsvd         Rsvd    Type    Version Rsvd    Size
+ */
+#define PKG_DIR_SIZE_MASK	GENMASK_ULL(23, 0)
+#define PKG_DIR_VERSION_MASK	GENMASK_ULL(47, 32)
+#define PKG_DIR_TYPE_MASK	GENMASK_ULL(54, 48)
+
+static inline const struct ipu6_cpd_ent *ipu6_cpd_get_entry(const void *cpd,
+							    u8 idx)
+{
+	const struct ipu6_cpd_hdr *cpd_hdr = cpd;
+	const struct ipu6_cpd_ent *ent;
+
+	ent = (const struct ipu6_cpd_ent *)((const u8 *)cpd + cpd_hdr->hdr_len);
+	return ent + idx;
+}
+
+#define ipu6_cpd_get_manifest(cpd) ipu6_cpd_get_entry(cpd, MANIFEST_IDX)
+#define ipu6_cpd_get_metadata(cpd) ipu6_cpd_get_entry(cpd, METADATA_IDX)
+#define ipu6_cpd_get_moduledata(cpd) ipu6_cpd_get_entry(cpd, MODULEDATA_IDX)
+
+static const struct ipu6_cpd_metadata_cmpnt_hdr *
+ipu6_cpd_metadata_get_cmpnt(struct ipu6_device *isp, const void *metadata,
+			    unsigned int metadata_size, u8 idx)
+{
+	size_t extn_size = sizeof(struct ipu6_cpd_metadata_extn);
+	size_t cmpnt_count = metadata_size - extn_size;
+
+	cmpnt_count = div_u64(cmpnt_count, isp->cpd_metadata_cmpnt_size);
+
+	if (idx > MAX_COMPONENT_ID || idx >= cmpnt_count) {
+		dev_err(&isp->pdev->dev, "Component index out of range (%d)\n",
+			idx);
+		return ERR_PTR(-EINVAL);
+	}
+
+	return metadata + extn_size + idx * isp->cpd_metadata_cmpnt_size;
+}
+
+static u32 ipu6_cpd_metadata_cmpnt_version(struct ipu6_device *isp,
+					   const void *metadata,
+					   unsigned int metadata_size, u8 idx)
+{
+	const struct ipu6_cpd_metadata_cmpnt_hdr *cmpnt;
+
+	cmpnt = ipu6_cpd_metadata_get_cmpnt(isp, metadata, metadata_size, idx);
+	if (IS_ERR(cmpnt))
+		return PTR_ERR(cmpnt);
+
+	return cmpnt->ver;
+}
+
+static int ipu6_cpd_metadata_get_cmpnt_id(struct ipu6_device *isp,
+					  const void *metadata,
+					  unsigned int metadata_size, u8 idx)
+{
+	const struct ipu6_cpd_metadata_cmpnt_hdr *cmpnt;
+
+	cmpnt = ipu6_cpd_metadata_get_cmpnt(isp, metadata, metadata_size, idx);
+	if (IS_ERR(cmpnt))
+		return PTR_ERR(cmpnt);
+
+	return cmpnt->id;
+}
+
+static int ipu6_cpd_parse_module_data(struct ipu6_device *isp,
+				      const void *module_data,
+				      unsigned int module_data_size,
+				      dma_addr_t dma_addr_module_data,
+				      u64 *pkg_dir, const void *metadata,
+				      unsigned int metadata_size)
+{
+	const struct ipu6_cpd_module_data_hdr *module_data_hdr;
+	const struct ipu6_cpd_hdr *dir_hdr;
+	const struct ipu6_cpd_ent *dir_ent;
+	unsigned int i;
+	u8 len;
+
+	if (!module_data)
+		return -EINVAL;
+
+	module_data_hdr = module_data;
+	dir_hdr = module_data + module_data_hdr->hdr_len;
+	len = dir_hdr->hdr_len;
+	dir_ent = (const struct ipu6_cpd_ent *)(((u8 *)dir_hdr) + len);
+
+	pkg_dir[0] = PKG_DIR_HDR_MARK;
+	/* pkg_dir entry count = component count + pkg_dir header */
+	pkg_dir[1] = dir_hdr->ent_cnt + 1;
+
+	for (i = 0; i < dir_hdr->ent_cnt; i++, dir_ent++) {
+		u64 *p = &pkg_dir[PKG_DIR_ENT_LEN *  (1 + i)];
+		int ver, id;
+
+		*p++ = dma_addr_module_data + dir_ent->offset;
+		id = ipu6_cpd_metadata_get_cmpnt_id(isp, metadata,
+						    metadata_size, i);
+		if (id < 0 || id > MAX_COMPONENT_ID) {
+			dev_err(&isp->pdev->dev, "Invalid CPD component id\n");
+			return -EINVAL;
+		}
+
+		ver = ipu6_cpd_metadata_cmpnt_version(isp, metadata,
+						      metadata_size, i);
+		if (ver < 0 || ver > MAX_COMPONENT_VERSION) {
+			dev_err(&isp->pdev->dev,
+				"Invalid CPD component version\n");
+			return -EINVAL;
+		}
+
+		*p = FIELD_PREP(PKG_DIR_SIZE_MASK, dir_ent->len) |
+			FIELD_PREP(PKG_DIR_TYPE_MASK, id) |
+			FIELD_PREP(PKG_DIR_VERSION_MASK, ver);
+	}
+
+	return 0;
+}
+
+int ipu6_cpd_create_pkg_dir(struct ipu6_bus_device *adev, const void *src)
+{
+	dma_addr_t dma_addr_src = sg_dma_address(adev->fw_sgt.sgl);
+	const struct ipu6_cpd_ent *ent, *man_ent, *met_ent;
+	struct ipu6_device *isp = adev->isp;
+	unsigned int man_sz, met_sz;
+	void *pkg_dir_pos;
+	int ret;
+
+	man_ent = ipu6_cpd_get_manifest(src);
+	man_sz = man_ent->len;
+
+	met_ent = ipu6_cpd_get_metadata(src);
+	met_sz = met_ent->len;
+
+	adev->pkg_dir_size = PKG_DIR_SIZE + man_sz + met_sz;
+	adev->pkg_dir = ipu6_dma_alloc(adev, adev->pkg_dir_size,
+				       &adev->pkg_dir_dma_addr, GFP_KERNEL, 0);
+	if (!adev->pkg_dir)
+		return -ENOMEM;
+
+	/*
+	 * pkg_dir entry/header:
+	 * qword | 63:56 | 55   | 54:48 | 47:32 | 31:24 | 23:0
+	 * N         Address/Offset/"_IUPKDR_"
+	 * N + 1 | rsvd  | rsvd | type  | ver   | rsvd  | size
+	 *
+	 * We can ignore other fields that size in N + 1 qword as they
+	 * are 0 anyway. Just setting size for now.
+	 */
+
+	ent = ipu6_cpd_get_moduledata(src);
+
+	ret = ipu6_cpd_parse_module_data(isp, src + ent->offset,
+					 ent->len, dma_addr_src + ent->offset,
+					 adev->pkg_dir, src + met_ent->offset,
+					 met_ent->len);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "Failed to parse module data\n");
+		ipu6_dma_free(adev, adev->pkg_dir_size,
+			      adev->pkg_dir, adev->pkg_dir_dma_addr, 0);
+		return ret;
+	}
+
+	/* Copy manifest after pkg_dir */
+	pkg_dir_pos = adev->pkg_dir + PKG_DIR_ENT_LEN * MAX_PKG_DIR_ENT_CNT;
+	memcpy(pkg_dir_pos, src + man_ent->offset, man_sz);
+
+	/* Copy metadata after manifest */
+	pkg_dir_pos += man_sz;
+	memcpy(pkg_dir_pos, src + met_ent->offset, met_sz);
+
+	ipu6_dma_sync_single(adev, adev->pkg_dir_dma_addr,
+			     adev->pkg_dir_size);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_cpd_create_pkg_dir, "INTEL_IPU6");
+
+void ipu6_cpd_free_pkg_dir(struct ipu6_bus_device *adev)
+{
+	ipu6_dma_free(adev, adev->pkg_dir_size, adev->pkg_dir,
+		      adev->pkg_dir_dma_addr, 0);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_cpd_free_pkg_dir, "INTEL_IPU6");
+
+static int ipu6_cpd_validate_cpd(struct ipu6_device *isp, const void *cpd,
+				 unsigned long cpd_size,
+				 unsigned long data_size)
+{
+	const struct ipu6_cpd_hdr *cpd_hdr = cpd;
+	const struct ipu6_cpd_ent *ent;
+	unsigned int i;
+	u8 len;
+
+	len = cpd_hdr->hdr_len;
+
+	/* Ensure cpd hdr is within moduledata */
+	if (cpd_size < len) {
+		dev_err(&isp->pdev->dev, "Invalid CPD moduledata size\n");
+		return -EINVAL;
+	}
+
+	/* Sanity check for CPD header */
+	if ((cpd_size - len) / sizeof(*ent) < cpd_hdr->ent_cnt) {
+		dev_err(&isp->pdev->dev, "Invalid CPD header\n");
+		return -EINVAL;
+	}
+
+	/* Ensure that all entries are within moduledata */
+	ent = (const struct ipu6_cpd_ent *)(((const u8 *)cpd_hdr) + len);
+	for (i = 0; i < cpd_hdr->ent_cnt; i++, ent++) {
+		if (data_size < ent->offset ||
+		    data_size - ent->offset < ent->len) {
+			dev_err(&isp->pdev->dev, "Invalid CPD entry (%d)\n", i);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int ipu6_cpd_validate_moduledata(struct ipu6_device *isp,
+					const void *moduledata,
+					u32 moduledata_size)
+{
+	const struct ipu6_cpd_module_data_hdr *mod_hdr = moduledata;
+	int ret;
+
+	/* Ensure moduledata hdr is within moduledata */
+	if (moduledata_size < sizeof(*mod_hdr) ||
+	    moduledata_size < mod_hdr->hdr_len) {
+		dev_err(&isp->pdev->dev, "Invalid CPD moduledata size\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(&isp->pdev->dev, "FW version: %x\n", mod_hdr->fw_pkg_date);
+	ret = ipu6_cpd_validate_cpd(isp, moduledata + mod_hdr->hdr_len,
+				    moduledata_size - mod_hdr->hdr_len,
+				    moduledata_size);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "Invalid CPD in moduledata\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ipu6_cpd_validate_metadata(struct ipu6_device *isp,
+				      const void *metadata, u32 meta_size)
+{
+	const struct ipu6_cpd_metadata_extn *extn = metadata;
+
+	/* Sanity check for metadata size */
+	if (meta_size < sizeof(*extn) || meta_size > MAX_METADATA_SIZE) {
+		dev_err(&isp->pdev->dev, "Invalid CPD metadata\n");
+		return -EINVAL;
+	}
+
+	/* Validate extension and image types */
+	if (extn->extn_type != IPU6_CPD_METADATA_EXTN_TYPE_IUNIT ||
+	    extn->img_type != IPU6_CPD_METADATA_IMAGE_TYPE_MAIN_FIRMWARE) {
+		dev_err(&isp->pdev->dev,
+			"Invalid CPD metadata descriptor img_type (%d)\n",
+			extn->img_type);
+		return -EINVAL;
+	}
+
+	/* Validate metadata size multiple of metadata components */
+	if ((meta_size - sizeof(*extn)) % isp->cpd_metadata_cmpnt_size) {
+		dev_err(&isp->pdev->dev, "Invalid CPD metadata size\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int ipu6_cpd_validate_cpd_file(struct ipu6_device *isp, const void *cpd_file,
+			       unsigned long cpd_file_size)
+{
+	const struct ipu6_cpd_hdr *hdr = cpd_file;
+	const struct ipu6_cpd_ent *ent;
+	int ret;
+
+	ret = ipu6_cpd_validate_cpd(isp, cpd_file, cpd_file_size,
+				    cpd_file_size);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "Invalid CPD in file\n");
+		return ret;
+	}
+
+	/* Check for CPD file marker */
+	if (hdr->hdr_mark != CPD_HDR_MARK) {
+		dev_err(&isp->pdev->dev, "Invalid CPD header\n");
+		return -EINVAL;
+	}
+
+	/* Sanity check for manifest size */
+	ent = ipu6_cpd_get_manifest(cpd_file);
+	if (ent->len > MAX_MANIFEST_SIZE) {
+		dev_err(&isp->pdev->dev, "Invalid CPD manifest size\n");
+		return -EINVAL;
+	}
+
+	/* Validate metadata */
+	ent = ipu6_cpd_get_metadata(cpd_file);
+	ret = ipu6_cpd_validate_metadata(isp, cpd_file + ent->offset, ent->len);
+	if (ret) {
+		dev_err(&isp->pdev->dev, "Invalid CPD metadata\n");
+		return ret;
+	}
+
+	/* Validate moduledata */
+	ent = ipu6_cpd_get_moduledata(cpd_file);
+	ret = ipu6_cpd_validate_moduledata(isp, cpd_file + ent->offset,
+					   ent->len);
+	if (ret)
+		dev_err(&isp->pdev->dev, "Invalid CPD moduledata\n");
+
+	return ret;
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-cpd.h

@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2015--2024 Intel Corporation */
+
+#ifndef IPU6_CPD_H
+#define IPU6_CPD_H
+
+struct ipu6_device;
+struct ipu6_bus_device;
+
+#define IPU6_CPD_SIZE_OF_FW_ARCH_VERSION	7
+#define IPU6_CPD_SIZE_OF_SYSTEM_VERSION		11
+#define IPU6_CPD_SIZE_OF_COMPONENT_NAME		12
+
+#define IPU6_CPD_METADATA_EXTN_TYPE_IUNIT	0x10
+
+#define IPU6_CPD_METADATA_IMAGE_TYPE_RESERVED		0
+#define IPU6_CPD_METADATA_IMAGE_TYPE_BOOTLOADER		1
+#define IPU6_CPD_METADATA_IMAGE_TYPE_MAIN_FIRMWARE	2
+
+#define IPU6_CPD_PKG_DIR_PSYS_SERVER_IDX	0
+#define IPU6_CPD_PKG_DIR_ISYS_SERVER_IDX	1
+
+#define IPU6_CPD_PKG_DIR_CLIENT_PG_TYPE		3
+
+#define IPU6_CPD_METADATA_HASH_KEY_SIZE		48
+#define IPU6SE_CPD_METADATA_HASH_KEY_SIZE	32
+
+struct ipu6_cpd_module_data_hdr {
+	u32 hdr_len;
+	u32 endian;
+	u32 fw_pkg_date;
+	u32 hive_sdk_date;
+	u32 compiler_date;
+	u32 target_platform_type;
+	u8 sys_ver[IPU6_CPD_SIZE_OF_SYSTEM_VERSION];
+	u8 fw_arch_ver[IPU6_CPD_SIZE_OF_FW_ARCH_VERSION];
+	u8 rsvd[2];
+} __packed;
+
+/*
+ * ipu6_cpd_hdr structure updated as the chksum and
+ * sub_partition_name is unused on host side
+ * CSE layout version 1.6 for IPU6SE (hdr_len = 0x10)
+ * CSE layout version 1.7 for IPU6 (hdr_len = 0x14)
+ */
+struct ipu6_cpd_hdr {
+	u32 hdr_mark;
+	u32 ent_cnt;
+	u8 hdr_ver;
+	u8 ent_ver;
+	u8 hdr_len;
+} __packed;
+
+struct ipu6_cpd_ent {
+	u8 name[IPU6_CPD_SIZE_OF_COMPONENT_NAME];
+	u32 offset;
+	u32 len;
+	u8 rsvd[4];
+} __packed;
+
+struct ipu6_cpd_metadata_cmpnt_hdr {
+	u32 id;
+	u32 size;
+	u32 ver;
+} __packed;
+
+struct ipu6_cpd_metadata_cmpnt {
+	struct ipu6_cpd_metadata_cmpnt_hdr hdr;
+	u8 sha2_hash[IPU6_CPD_METADATA_HASH_KEY_SIZE];
+	u32 entry_point;
+	u32 icache_base_offs;
+	u8 attrs[16];
+} __packed;
+
+struct ipu6se_cpd_metadata_cmpnt {
+	struct ipu6_cpd_metadata_cmpnt_hdr hdr;
+	u8 sha2_hash[IPU6SE_CPD_METADATA_HASH_KEY_SIZE];
+	u32 entry_point;
+	u32 icache_base_offs;
+	u8 attrs[16];
+} __packed;
+
+struct ipu6_cpd_metadata_extn {
+	u32 extn_type;
+	u32 len;
+	u32 img_type;
+	u8 rsvd[16];
+} __packed;
+
+struct ipu6_cpd_client_pkg_hdr {
+	u32 prog_list_offs;
+	u32 prog_list_size;
+	u32 prog_desc_offs;
+	u32 prog_desc_size;
+	u32 pg_manifest_offs;
+	u32 pg_manifest_size;
+	u32 prog_bin_offs;
+	u32 prog_bin_size;
+} __packed;
+
+int ipu6_cpd_create_pkg_dir(struct ipu6_bus_device *adev, const void *src);
+void ipu6_cpd_free_pkg_dir(struct ipu6_bus_device *adev);
+int ipu6_cpd_validate_cpd_file(struct ipu6_device *isp, const void *cpd_file,
+			       unsigned long cpd_file_size);
+#endif /* IPU6_CPD_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-dma.c

@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/cacheflush.h>
+#include <linux/dma-mapping.h>
+#include <linux/iova.h>
+#include <linux/list.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-dma.h"
+#include "ipu6-mmu.h"
+
+struct vm_info {
+	struct list_head list;
+	struct page **pages;
+	dma_addr_t ipu6_iova;
+	void *vaddr;
+	unsigned long size;
+};
+
+static struct vm_info *get_vm_info(struct ipu6_mmu *mmu, dma_addr_t iova)
+{
+	struct vm_info *info, *save;
+
+	list_for_each_entry_safe(info, save, &mmu->vma_list, list) {
+		if (iova >= info->ipu6_iova &&
+		    iova < (info->ipu6_iova + info->size))
+			return info;
+	}
+
+	return NULL;
+}
+
+static void __clear_buffer(struct page *page, size_t size, unsigned long attrs)
+{
+	void *ptr;
+
+	if (!page)
+		return;
+	/*
+	 * Ensure that the allocated pages are zeroed, and that any data
+	 * lurking in the kernel direct-mapped region is invalidated.
+	 */
+	ptr = page_address(page);
+	memset(ptr, 0, size);
+	if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
+		clflush_cache_range(ptr, size);
+}
+
+static struct page **__alloc_buffer(size_t size, gfp_t gfp, unsigned long attrs)
+{
+	int count = PHYS_PFN(size);
+	int array_size = count * sizeof(struct page *);
+	struct page **pages;
+	int i = 0;
+
+	pages = kvzalloc(array_size, GFP_KERNEL);
+	if (!pages)
+		return NULL;
+
+	gfp |= __GFP_NOWARN;
+
+	while (count) {
+		int j, order = __fls(count);
+
+		pages[i] = alloc_pages(gfp, order);
+		while (!pages[i] && order)
+			pages[i] = alloc_pages(gfp, --order);
+		if (!pages[i])
+			goto error;
+
+		if (order) {
+			split_page(pages[i], order);
+			j = 1 << order;
+			while (j--)
+				pages[i + j] = pages[i] + j;
+		}
+
+		__clear_buffer(pages[i], PAGE_SIZE << order, attrs);
+		i += 1 << order;
+		count -= 1 << order;
+	}
+
+	return pages;
+error:
+	while (i--)
+		if (pages[i])
+			__free_pages(pages[i], 0);
+	kvfree(pages);
+	return NULL;
+}
+
+static void __free_buffer(struct page **pages, size_t size, unsigned long attrs)
+{
+	int count = PHYS_PFN(size);
+	unsigned int i;
+
+	for (i = 0; i < count && pages[i]; i++) {
+		__clear_buffer(pages[i], PAGE_SIZE, attrs);
+		__free_pages(pages[i], 0);
+	}
+
+	kvfree(pages);
+}
+
+void ipu6_dma_sync_single(struct ipu6_bus_device *sys, dma_addr_t dma_handle,
+			  size_t size)
+{
+	void *vaddr;
+	u32 offset;
+	struct vm_info *info;
+	struct ipu6_mmu *mmu = sys->mmu;
+
+	info = get_vm_info(mmu, dma_handle);
+	if (WARN_ON(!info))
+		return;
+
+	offset = dma_handle - info->ipu6_iova;
+	if (WARN_ON(size > (info->size - offset)))
+		return;
+
+	vaddr = info->vaddr + offset;
+	clflush_cache_range(vaddr, size);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_sync_single, "INTEL_IPU6");
+
+void ipu6_dma_sync_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		      int nents)
+{
+	struct scatterlist *sg;
+	int i;
+
+	for_each_sg(sglist, sg, nents, i)
+		clflush_cache_range(sg_virt(sg), sg->length);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_sync_sg, "INTEL_IPU6");
+
+void ipu6_dma_sync_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt)
+{
+	ipu6_dma_sync_sg(sys, sgt->sgl, sgt->orig_nents);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_sync_sgtable, "INTEL_IPU6");
+
+void *ipu6_dma_alloc(struct ipu6_bus_device *sys, size_t size,
+		     dma_addr_t *dma_handle, gfp_t gfp,
+		     unsigned long attrs)
+{
+	struct device *dev = &sys->auxdev.dev;
+	struct pci_dev *pdev = sys->isp->pdev;
+	dma_addr_t pci_dma_addr, ipu6_iova;
+	struct ipu6_mmu *mmu = sys->mmu;
+	struct vm_info *info;
+	unsigned long count;
+	struct page **pages;
+	struct iova *iova;
+	unsigned int i;
+	int ret;
+
+	info = kzalloc_obj(*info);
+	if (!info)
+		return NULL;
+
+	size = PAGE_ALIGN(size);
+	count = PHYS_PFN(size);
+
+	iova = alloc_iova(&mmu->dmap->iovad, count,
+			  PHYS_PFN(mmu->dmap->mmu_info->aperture_end), 0);
+	if (!iova)
+		goto out_kfree;
+
+	pages = __alloc_buffer(size, gfp, attrs);
+	if (!pages)
+		goto out_free_iova;
+
+	dev_dbg(dev, "dma_alloc: size %zu iova low pfn %lu, high pfn %lu\n",
+		size, iova->pfn_lo, iova->pfn_hi);
+	for (i = 0; iova->pfn_lo + i <= iova->pfn_hi; i++) {
+		pci_dma_addr = dma_map_page_attrs(&pdev->dev, pages[i], 0,
+						  PAGE_SIZE, DMA_BIDIRECTIONAL,
+						  attrs);
+		dev_dbg(dev, "dma_alloc: mapped pci_dma_addr %pad\n",
+			&pci_dma_addr);
+		if (dma_mapping_error(&pdev->dev, pci_dma_addr)) {
+			dev_err(dev, "pci_dma_mapping for page[%d] failed", i);
+			goto out_unmap;
+		}
+
+		ret = ipu6_mmu_map(mmu->dmap->mmu_info,
+				   PFN_PHYS(iova->pfn_lo + i), pci_dma_addr,
+				   PAGE_SIZE);
+		if (ret) {
+			dev_err(dev, "ipu6_mmu_map for pci_dma[%d] %pad failed",
+				i, &pci_dma_addr);
+			dma_unmap_page_attrs(&pdev->dev, pci_dma_addr,
+					     PAGE_SIZE, DMA_BIDIRECTIONAL,
+					     attrs);
+			goto out_unmap;
+		}
+	}
+
+	info->vaddr = vmap(pages, count, VM_USERMAP, PAGE_KERNEL);
+	if (!info->vaddr)
+		goto out_unmap;
+
+	*dma_handle = PFN_PHYS(iova->pfn_lo);
+
+	info->pages = pages;
+	info->ipu6_iova = *dma_handle;
+	info->size = size;
+	list_add(&info->list, &mmu->vma_list);
+
+	return info->vaddr;
+
+out_unmap:
+	while (i--) {
+		ipu6_iova = PFN_PHYS(iova->pfn_lo + i);
+		pci_dma_addr = ipu6_mmu_iova_to_phys(mmu->dmap->mmu_info,
+						     ipu6_iova);
+		dma_unmap_page_attrs(&pdev->dev, pci_dma_addr, PAGE_SIZE,
+				     DMA_BIDIRECTIONAL, attrs);
+
+		ipu6_mmu_unmap(mmu->dmap->mmu_info, ipu6_iova, PAGE_SIZE);
+	}
+
+	__free_buffer(pages, size, attrs);
+
+out_free_iova:
+	__free_iova(&mmu->dmap->iovad, iova);
+out_kfree:
+	kfree(info);
+
+	return NULL;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_alloc, "INTEL_IPU6");
+
+void ipu6_dma_free(struct ipu6_bus_device *sys, size_t size, void *vaddr,
+		   dma_addr_t dma_handle, unsigned long attrs)
+{
+	struct ipu6_mmu *mmu = sys->mmu;
+	struct pci_dev *pdev = sys->isp->pdev;
+	struct iova *iova = find_iova(&mmu->dmap->iovad, PHYS_PFN(dma_handle));
+	dma_addr_t pci_dma_addr, ipu6_iova;
+	struct vm_info *info;
+	struct page **pages;
+	unsigned int i;
+
+	if (WARN_ON(!iova))
+		return;
+
+	info = get_vm_info(mmu, dma_handle);
+	if (WARN_ON(!info))
+		return;
+
+	if (WARN_ON(!info->vaddr))
+		return;
+
+	if (WARN_ON(!info->pages))
+		return;
+
+	list_del(&info->list);
+
+	size = PAGE_ALIGN(size);
+
+	pages = info->pages;
+
+	vunmap(vaddr);
+
+	for (i = 0; i < PHYS_PFN(size); i++) {
+		ipu6_iova = PFN_PHYS(iova->pfn_lo + i);
+		pci_dma_addr = ipu6_mmu_iova_to_phys(mmu->dmap->mmu_info,
+						     ipu6_iova);
+		dma_unmap_page_attrs(&pdev->dev, pci_dma_addr, PAGE_SIZE,
+				     DMA_BIDIRECTIONAL, attrs);
+	}
+
+	ipu6_mmu_unmap(mmu->dmap->mmu_info, PFN_PHYS(iova->pfn_lo),
+		       PFN_PHYS(iova_size(iova)));
+
+	__free_buffer(pages, size, attrs);
+
+	mmu->tlb_invalidate(mmu);
+
+	__free_iova(&mmu->dmap->iovad, iova);
+
+	kfree(info);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_free, "INTEL_IPU6");
+
+int ipu6_dma_mmap(struct ipu6_bus_device *sys, struct vm_area_struct *vma,
+		  void *addr, dma_addr_t iova, size_t size,
+		  unsigned long attrs)
+{
+	struct ipu6_mmu *mmu = sys->mmu;
+	size_t count = PFN_UP(size);
+	struct vm_info *info;
+	size_t i;
+	int ret;
+
+	info = get_vm_info(mmu, iova);
+	if (!info)
+		return -EFAULT;
+
+	if (!info->vaddr)
+		return -EFAULT;
+
+	if (vma->vm_start & ~PAGE_MASK)
+		return -EINVAL;
+
+	if (size > info->size)
+		return -EFAULT;
+
+	for (i = 0; i < count; i++) {
+		ret = vm_insert_page(vma, vma->vm_start + PFN_PHYS(i),
+				     info->pages[i]);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+void ipu6_dma_unmap_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		       int nents, enum dma_data_direction dir,
+		       unsigned long attrs)
+{
+	struct device *dev = &sys->auxdev.dev;
+	struct ipu6_mmu *mmu = sys->mmu;
+	struct iova *iova = find_iova(&mmu->dmap->iovad,
+				      PHYS_PFN(sg_dma_address(sglist)));
+	struct scatterlist *sg;
+	dma_addr_t pci_dma_addr;
+	unsigned int i;
+
+	if (!nents)
+		return;
+
+	if (WARN_ON(!iova))
+		return;
+
+	/*
+	 * Before IPU6 mmu unmap, return the pci dma address back to sg
+	 * assume the nents is less than orig_nents as the least granule
+	 * is 1 SZ_4K page
+	 */
+	dev_dbg(dev, "trying to unmap concatenated %u ents\n", nents);
+	for_each_sg(sglist, sg, nents, i) {
+		dev_dbg(dev, "unmap sg[%d] %pad size %u\n", i,
+			&sg_dma_address(sg), sg_dma_len(sg));
+		pci_dma_addr = ipu6_mmu_iova_to_phys(mmu->dmap->mmu_info,
+						     sg_dma_address(sg));
+		dev_dbg(dev, "return pci_dma_addr %pad back to sg[%d]\n",
+			&pci_dma_addr, i);
+		sg_dma_address(sg) = pci_dma_addr;
+	}
+
+	dev_dbg(dev, "ipu6_mmu_unmap low pfn %lu high pfn %lu\n",
+		iova->pfn_lo, iova->pfn_hi);
+	ipu6_mmu_unmap(mmu->dmap->mmu_info, PFN_PHYS(iova->pfn_lo),
+		       PFN_PHYS(iova_size(iova)));
+
+	mmu->tlb_invalidate(mmu);
+	__free_iova(&mmu->dmap->iovad, iova);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_unmap_sg, "INTEL_IPU6");
+
+int ipu6_dma_map_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		    int nents, enum dma_data_direction dir,
+		    unsigned long attrs)
+{
+	struct device *dev = &sys->auxdev.dev;
+	struct ipu6_mmu *mmu = sys->mmu;
+	struct scatterlist *sg;
+	struct iova *iova;
+	size_t npages = 0;
+	unsigned long iova_addr;
+	int i;
+
+	for_each_sg(sglist, sg, nents, i) {
+		if (sg->offset) {
+			dev_err(dev, "Unsupported non-zero sg[%d].offset %x\n",
+				i, sg->offset);
+			return -EFAULT;
+		}
+	}
+
+	for_each_sg(sglist, sg, nents, i)
+		npages += PFN_UP(sg_dma_len(sg));
+
+	dev_dbg(dev, "dmamap trying to map %d ents %zu pages\n",
+		nents, npages);
+
+	iova = alloc_iova(&mmu->dmap->iovad, npages,
+			  PHYS_PFN(mmu->dmap->mmu_info->aperture_end), 0);
+	if (!iova)
+		return 0;
+
+	dev_dbg(dev, "dmamap: iova low pfn %lu, high pfn %lu\n", iova->pfn_lo,
+		iova->pfn_hi);
+
+	iova_addr = iova->pfn_lo;
+	for_each_sg(sglist, sg, nents, i) {
+		phys_addr_t iova_pa;
+		int ret;
+
+		iova_pa = PFN_PHYS(iova_addr);
+		dev_dbg(dev, "mapping entry %d: iova %pap phy %pap size %d\n",
+			i, &iova_pa, &sg_dma_address(sg), sg_dma_len(sg));
+
+		ret = ipu6_mmu_map(mmu->dmap->mmu_info, PFN_PHYS(iova_addr),
+				   sg_dma_address(sg),
+				   PAGE_ALIGN(sg_dma_len(sg)));
+		if (ret)
+			goto out_fail;
+
+		sg_dma_address(sg) = PFN_PHYS(iova_addr);
+
+		iova_addr += PFN_UP(sg_dma_len(sg));
+	}
+
+	dev_dbg(dev, "dmamap %d ents %zu pages mapped\n", nents, npages);
+
+	return nents;
+
+out_fail:
+	ipu6_dma_unmap_sg(sys, sglist, i, dir, attrs);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_map_sg, "INTEL_IPU6");
+
+int ipu6_dma_map_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
+			 enum dma_data_direction dir, unsigned long attrs)
+{
+	int nents;
+
+	nents = ipu6_dma_map_sg(sys, sgt->sgl, sgt->nents, dir, attrs);
+	if (nents < 0)
+		return nents;
+
+	sgt->nents = nents;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_map_sgtable, "INTEL_IPU6");
+
+void ipu6_dma_unmap_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
+			    enum dma_data_direction dir, unsigned long attrs)
+{
+	ipu6_dma_unmap_sg(sys, sgt->sgl, sgt->nents, dir, attrs);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_dma_unmap_sgtable, "INTEL_IPU6");

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-dma.h

@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_DMA_H
+#define IPU6_DMA_H
+
+#include <linux/iova.h>
+#include <linux/scatterlist.h>
+#include <linux/types.h>
+
+#include "ipu6-bus.h"
+
+struct ipu6_mmu_info;
+
+struct ipu6_dma_mapping {
+	struct ipu6_mmu_info *mmu_info;
+	struct iova_domain iovad;
+};
+
+void ipu6_dma_sync_single(struct ipu6_bus_device *sys, dma_addr_t dma_handle,
+			  size_t size);
+void ipu6_dma_sync_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		      int nents);
+void ipu6_dma_sync_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt);
+void *ipu6_dma_alloc(struct ipu6_bus_device *sys, size_t size,
+		     dma_addr_t *dma_handle, gfp_t gfp,
+		     unsigned long attrs);
+void ipu6_dma_free(struct ipu6_bus_device *sys, size_t size, void *vaddr,
+		   dma_addr_t dma_handle, unsigned long attrs);
+int ipu6_dma_mmap(struct ipu6_bus_device *sys, struct vm_area_struct *vma,
+		  void *addr, dma_addr_t iova, size_t size,
+		  unsigned long attrs);
+int ipu6_dma_map_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		    int nents, enum dma_data_direction dir,
+		    unsigned long attrs);
+void ipu6_dma_unmap_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
+		       int nents, enum dma_data_direction dir,
+		       unsigned long attrs);
+int ipu6_dma_map_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
+			 enum dma_data_direction dir, unsigned long attrs);
+void ipu6_dma_unmap_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
+			    enum dma_data_direction dir, unsigned long attrs);
+#endif /* IPU6_DMA_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-fw-com.c

@@ -0,0 +1,413 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/math.h>
+#include <linux/overflow.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-dma.h"
+#include "ipu6-fw-com.h"
+
+/*
+ * FWCOM layer is a shared resource between FW and driver. It consist
+ * of token queues to both send and receive directions. Queue is simply
+ * an array of structures with read and write indexes to the queue.
+ * There are 1...n queues to both directions. Queues locates in
+ * system RAM and are mapped to ISP MMU so that both CPU and ISP can
+ * see the same buffer. Indexes are located in ISP DMEM so that FW code
+ * can poll those with very low latency and cost. CPU access to indexes is
+ * more costly but that happens only at message sending time and
+ * interrupt triggered message handling. CPU doesn't need to poll indexes.
+ * wr_reg / rd_reg are offsets to those dmem location. They are not
+ * the indexes itself.
+ */
+
+/* Shared structure between driver and FW - do not modify */
+struct ipu6_fw_sys_queue {
+	u64 host_address;
+	u32 vied_address;
+	u32 size;
+	u32 token_size;
+	u32 wr_reg;	/* reg number in subsystem's regmem */
+	u32 rd_reg;
+	u32 _align;
+} __packed;
+
+struct ipu6_fw_sys_queue_res {
+	u64 host_address;
+	u32 vied_address;
+	u32 reg;
+} __packed;
+
+enum syscom_state {
+	/* Program load or explicit host setting should init to this */
+	SYSCOM_STATE_UNINIT = 0x57a7e000,
+	/* SP Syscom sets this when it is ready for use */
+	SYSCOM_STATE_READY = 0x57a7e001,
+	/* SP Syscom sets this when no more syscom accesses will happen */
+	SYSCOM_STATE_INACTIVE = 0x57a7e002,
+};
+
+enum syscom_cmd {
+	/* Program load or explicit host setting should init to this */
+	SYSCOM_COMMAND_UNINIT = 0x57a7f000,
+	/* Host Syscom requests syscom to become inactive */
+	SYSCOM_COMMAND_INACTIVE = 0x57a7f001,
+};
+
+/* firmware config: data that sent from the host to SP via DDR */
+/* Cell copies data into a context */
+
+struct ipu6_fw_syscom_config {
+	u32 firmware_address;
+
+	u32 num_input_queues;
+	u32 num_output_queues;
+
+	/* ISP pointers to an array of ipu6_fw_sys_queue structures */
+	u32 input_queue;
+	u32 output_queue;
+
+	/* ISYS / PSYS private data */
+	u32 specific_addr;
+	u32 specific_size;
+};
+
+struct ipu6_fw_com_context {
+	struct ipu6_bus_device *adev;
+	void __iomem *dmem_addr;
+	int (*cell_ready)(struct ipu6_bus_device *adev);
+	void (*cell_start)(struct ipu6_bus_device *adev);
+
+	void *dma_buffer;
+	dma_addr_t dma_addr;
+	unsigned int dma_size;
+
+	struct ipu6_fw_sys_queue *input_queue;	/* array of host to SP queues */
+	struct ipu6_fw_sys_queue *output_queue;	/* array of SP to host */
+
+	u32 config_vied_addr;
+
+	unsigned int buttress_boot_offset;
+	void __iomem *base_addr;
+};
+
+#define FW_COM_WR_REG 0
+#define FW_COM_RD_REG 4
+
+#define REGMEM_OFFSET 0
+#define TUNIT_MAGIC_PATTERN 0x5a5a5a5a
+
+enum regmem_id {
+	/* pass pkg_dir address to SPC in non-secure mode */
+	PKG_DIR_ADDR_REG = 0,
+	/* Tunit CFG blob for secure - provided by host.*/
+	TUNIT_CFG_DWR_REG = 1,
+	/* syscom commands - modified by the host */
+	SYSCOM_COMMAND_REG = 2,
+	/* Store interrupt status - updated by SP */
+	SYSCOM_IRQ_REG = 3,
+	/* first syscom queue pointer register */
+	SYSCOM_QPR_BASE_REG = 4
+};
+
+#define BUTTRESS_FW_BOOT_PARAMS_0 0x4000
+#define BUTTRESS_FW_BOOT_PARAM_REG(base, offset, id)			\
+	((base) + BUTTRESS_FW_BOOT_PARAMS_0 + ((offset) + (id)) * 4)
+
+enum buttress_syscom_id {
+	/* pass syscom configuration to SPC */
+	SYSCOM_CONFIG_ID		= 0,
+	/* syscom state - modified by SP */
+	SYSCOM_STATE_ID			= 1,
+	/* syscom vtl0 addr mask */
+	SYSCOM_VTL0_ADDR_MASK_ID	= 2,
+	SYSCOM_ID_MAX
+};
+
+static void ipu6_sys_queue_init(struct ipu6_fw_sys_queue *q, unsigned int size,
+				unsigned int token_size,
+				struct ipu6_fw_sys_queue_res *res)
+{
+	unsigned int buf_size = (size + 1) * token_size;
+
+	q->size = size + 1;
+	q->token_size = token_size;
+
+	/* acquire the shared buffer space */
+	q->host_address = res->host_address;
+	res->host_address += buf_size;
+	q->vied_address = res->vied_address;
+	res->vied_address += buf_size;
+
+	/* acquire the shared read and writer pointers */
+	q->wr_reg = res->reg;
+	res->reg++;
+	q->rd_reg = res->reg;
+	res->reg++;
+}
+
+void *ipu6_fw_com_prepare(struct ipu6_fw_com_cfg *cfg,
+			  struct ipu6_bus_device *adev, void __iomem *base)
+{
+	size_t conf_size, inq_size, outq_size, specific_size;
+	struct ipu6_fw_syscom_config *config_host_addr;
+	unsigned int sizeinput = 0, sizeoutput = 0;
+	struct ipu6_fw_sys_queue_res res;
+	struct ipu6_fw_com_context *ctx;
+	struct device *dev = &adev->auxdev.dev;
+	size_t sizeall, offset;
+	void *specific_host_addr;
+	unsigned int i;
+
+	if (!cfg || !cfg->cell_start || !cfg->cell_ready)
+		return NULL;
+
+	ctx = kzalloc_obj(*ctx);
+	if (!ctx)
+		return NULL;
+	ctx->dmem_addr = base + cfg->dmem_addr + REGMEM_OFFSET;
+	ctx->adev = adev;
+	ctx->cell_start = cfg->cell_start;
+	ctx->cell_ready = cfg->cell_ready;
+	ctx->buttress_boot_offset = cfg->buttress_boot_offset;
+	ctx->base_addr  = base;
+
+	/*
+	 * Allocate DMA mapped memory. Allocate one big chunk.
+	 */
+	/* Base cfg for FW */
+	conf_size = roundup(sizeof(struct ipu6_fw_syscom_config), 8);
+	/* Descriptions of the queues */
+	inq_size = size_mul(cfg->num_input_queues,
+			    sizeof(struct ipu6_fw_sys_queue));
+	outq_size = size_mul(cfg->num_output_queues,
+			     sizeof(struct ipu6_fw_sys_queue));
+	/* FW specific information structure */
+	specific_size = roundup(cfg->specific_size, 8);
+
+	sizeall = conf_size + inq_size + outq_size + specific_size;
+
+	for (i = 0; i < cfg->num_input_queues; i++)
+		sizeinput += size_mul(cfg->input[i].queue_size + 1,
+				      cfg->input[i].token_size);
+
+	for (i = 0; i < cfg->num_output_queues; i++)
+		sizeoutput += size_mul(cfg->output[i].queue_size + 1,
+				       cfg->output[i].token_size);
+
+	sizeall += sizeinput + sizeoutput;
+
+	ctx->dma_buffer = ipu6_dma_alloc(adev, sizeall, &ctx->dma_addr,
+					 GFP_KERNEL, 0);
+	if (!ctx->dma_buffer) {
+		dev_err(dev, "failed to allocate dma memory\n");
+		kfree(ctx);
+		return NULL;
+	}
+
+	ctx->dma_size = sizeall;
+
+	config_host_addr = ctx->dma_buffer;
+	ctx->config_vied_addr = ctx->dma_addr;
+
+	offset = conf_size;
+	ctx->input_queue = ctx->dma_buffer + offset;
+	config_host_addr->input_queue = ctx->dma_addr + offset;
+	config_host_addr->num_input_queues = cfg->num_input_queues;
+
+	offset += inq_size;
+	ctx->output_queue = ctx->dma_buffer + offset;
+	config_host_addr->output_queue = ctx->dma_addr + offset;
+	config_host_addr->num_output_queues = cfg->num_output_queues;
+
+	/* copy firmware specific data */
+	offset += outq_size;
+	specific_host_addr = ctx->dma_buffer + offset;
+	config_host_addr->specific_addr = ctx->dma_addr + offset;
+	config_host_addr->specific_size = cfg->specific_size;
+	if (cfg->specific_addr && cfg->specific_size)
+		memcpy(specific_host_addr, cfg->specific_addr,
+		       cfg->specific_size);
+
+	ipu6_dma_sync_single(adev, ctx->config_vied_addr, sizeall);
+
+	/* initialize input queues */
+	offset += specific_size;
+	res.reg = SYSCOM_QPR_BASE_REG;
+	res.host_address = (uintptr_t)(ctx->dma_buffer + offset);
+	res.vied_address = ctx->dma_addr + offset;
+	for (i = 0; i < cfg->num_input_queues; i++)
+		ipu6_sys_queue_init(ctx->input_queue + i,
+				    cfg->input[i].queue_size,
+				    cfg->input[i].token_size, &res);
+
+	/* initialize output queues */
+	offset += sizeinput;
+	res.host_address = (uintptr_t)(ctx->dma_buffer + offset);
+	res.vied_address = ctx->dma_addr + offset;
+	for (i = 0; i < cfg->num_output_queues; i++) {
+		ipu6_sys_queue_init(ctx->output_queue + i,
+				    cfg->output[i].queue_size,
+				    cfg->output[i].token_size, &res);
+	}
+
+	return ctx;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_fw_com_prepare, "INTEL_IPU6");
+
+int ipu6_fw_com_open(struct ipu6_fw_com_context *ctx)
+{
+	/* write magic pattern to disable the tunit trace */
+	writel(TUNIT_MAGIC_PATTERN, ctx->dmem_addr + TUNIT_CFG_DWR_REG * 4);
+	/* Check if SP is in valid state */
+	if (!ctx->cell_ready(ctx->adev))
+		return -EIO;
+
+	/* store syscom uninitialized command */
+	writel(SYSCOM_COMMAND_UNINIT, ctx->dmem_addr + SYSCOM_COMMAND_REG * 4);
+
+	/* store syscom uninitialized state */
+	writel(SYSCOM_STATE_UNINIT,
+	       BUTTRESS_FW_BOOT_PARAM_REG(ctx->base_addr,
+					  ctx->buttress_boot_offset,
+					  SYSCOM_STATE_ID));
+
+	/* store firmware configuration address */
+	writel(ctx->config_vied_addr,
+	       BUTTRESS_FW_BOOT_PARAM_REG(ctx->base_addr,
+					  ctx->buttress_boot_offset,
+					  SYSCOM_CONFIG_ID));
+	ctx->cell_start(ctx->adev);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_fw_com_open, "INTEL_IPU6");
+
+int ipu6_fw_com_close(struct ipu6_fw_com_context *ctx)
+{
+	int state;
+
+	state = readl(BUTTRESS_FW_BOOT_PARAM_REG(ctx->base_addr,
+						 ctx->buttress_boot_offset,
+						 SYSCOM_STATE_ID));
+	if (state != SYSCOM_STATE_READY)
+		return -EBUSY;
+
+	/* set close request flag */
+	writel(SYSCOM_COMMAND_INACTIVE, ctx->dmem_addr +
+	       SYSCOM_COMMAND_REG * 4);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_fw_com_close, "INTEL_IPU6");
+
+int ipu6_fw_com_release(struct ipu6_fw_com_context *ctx, unsigned int force)
+{
+	/* check if release is forced, an verify cell state if it is not */
+	if (!force && !ctx->cell_ready(ctx->adev))
+		return -EBUSY;
+
+	ipu6_dma_free(ctx->adev, ctx->dma_size,
+		      ctx->dma_buffer, ctx->dma_addr, 0);
+	kfree(ctx);
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_fw_com_release, "INTEL_IPU6");
+
+bool ipu6_fw_com_ready(struct ipu6_fw_com_context *ctx)
+{
+	int state;
+
+	state = readl(BUTTRESS_FW_BOOT_PARAM_REG(ctx->base_addr,
+						 ctx->buttress_boot_offset,
+						 SYSCOM_STATE_ID));
+
+	return state == SYSCOM_STATE_READY;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_fw_com_ready, "INTEL_IPU6");
+
+void *ipu6_send_get_token(struct ipu6_fw_com_context *ctx, int q_nbr)
+{
+	struct ipu6_fw_sys_queue *q = &ctx->input_queue[q_nbr];
+	void __iomem *q_dmem = ctx->dmem_addr + q->wr_reg * 4;
+	unsigned int wr, rd;
+	unsigned int packets;
+	unsigned int index;
+
+	wr = readl(q_dmem + FW_COM_WR_REG);
+	rd = readl(q_dmem + FW_COM_RD_REG);
+
+	if (WARN_ON_ONCE(wr >= q->size || rd >= q->size))
+		return NULL;
+
+	if (wr < rd)
+		packets = rd - wr - 1;
+	else
+		packets = q->size - (wr - rd + 1);
+
+	if (!packets)
+		return NULL;
+
+	index = readl(q_dmem + FW_COM_WR_REG);
+
+	return (void *)((uintptr_t)q->host_address + index * q->token_size);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_send_get_token, "INTEL_IPU6");
+
+void ipu6_send_put_token(struct ipu6_fw_com_context *ctx, int q_nbr)
+{
+	struct ipu6_fw_sys_queue *q = &ctx->input_queue[q_nbr];
+	void __iomem *q_dmem = ctx->dmem_addr + q->wr_reg * 4;
+	unsigned int wr = readl(q_dmem + FW_COM_WR_REG) + 1;
+
+	if (wr >= q->size)
+		wr = 0;
+
+	writel(wr, q_dmem + FW_COM_WR_REG);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_send_put_token, "INTEL_IPU6");
+
+void *ipu6_recv_get_token(struct ipu6_fw_com_context *ctx, int q_nbr)
+{
+	struct ipu6_fw_sys_queue *q = &ctx->output_queue[q_nbr];
+	void __iomem *q_dmem = ctx->dmem_addr + q->wr_reg * 4;
+	unsigned int wr, rd;
+	unsigned int packets;
+
+	wr = readl(q_dmem + FW_COM_WR_REG);
+	rd = readl(q_dmem + FW_COM_RD_REG);
+
+	if (WARN_ON_ONCE(wr >= q->size || rd >= q->size))
+		return NULL;
+
+	if (wr < rd)
+		wr += q->size;
+
+	packets = wr - rd;
+	if (!packets)
+		return NULL;
+
+	return (void *)((uintptr_t)q->host_address + rd * q->token_size);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_recv_get_token, "INTEL_IPU6");
+
+void ipu6_recv_put_token(struct ipu6_fw_com_context *ctx, int q_nbr)
+{
+	struct ipu6_fw_sys_queue *q = &ctx->output_queue[q_nbr];
+	void __iomem *q_dmem = ctx->dmem_addr + q->wr_reg * 4;
+	unsigned int rd = readl(q_dmem + FW_COM_RD_REG) + 1;
+
+	if (rd >= q->size)
+		rd = 0;
+
+	writel(rd, q_dmem + FW_COM_RD_REG);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_recv_put_token, "INTEL_IPU6");

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-fw-com.h

@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_FW_COM_H
+#define IPU6_FW_COM_H
+
+struct ipu6_fw_com_context;
+struct ipu6_bus_device;
+
+struct ipu6_fw_syscom_queue_config {
+	unsigned int queue_size;	/* tokens per queue */
+	unsigned int token_size;	/* bytes per token */
+};
+
+#define SYSCOM_BUTTRESS_FW_PARAMS_ISYS_OFFSET	0
+
+struct ipu6_fw_com_cfg {
+	unsigned int num_input_queues;
+	unsigned int num_output_queues;
+	struct ipu6_fw_syscom_queue_config *input;
+	struct ipu6_fw_syscom_queue_config *output;
+
+	unsigned int dmem_addr;
+
+	/* firmware-specific configuration data */
+	void *specific_addr;
+	unsigned int specific_size;
+	int (*cell_ready)(struct ipu6_bus_device *adev);
+	void (*cell_start)(struct ipu6_bus_device *adev);
+
+	unsigned int buttress_boot_offset;
+};
+
+void *ipu6_fw_com_prepare(struct ipu6_fw_com_cfg *cfg,
+			  struct ipu6_bus_device *adev, void __iomem *base);
+
+int ipu6_fw_com_open(struct ipu6_fw_com_context *ctx);
+bool ipu6_fw_com_ready(struct ipu6_fw_com_context *ctx);
+int ipu6_fw_com_close(struct ipu6_fw_com_context *ctx);
+int ipu6_fw_com_release(struct ipu6_fw_com_context *ctx, unsigned int force);
+
+void *ipu6_recv_get_token(struct ipu6_fw_com_context *ctx, int q_nbr);
+void ipu6_recv_put_token(struct ipu6_fw_com_context *ctx, int q_nbr);
+void *ipu6_send_get_token(struct ipu6_fw_com_context *ctx, int q_nbr);
+void ipu6_send_put_token(struct ipu6_fw_com_context *ctx, int q_nbr);
+
+#endif

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-fw-isys.c

@@ -0,0 +1,487 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/cacheflush.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-fw-com.h"
+#include "ipu6-isys.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+#include "ipu6-platform-regs.h"
+
+static const char send_msg_types[N_IPU6_FW_ISYS_SEND_TYPE][32] = {
+	"STREAM_OPEN",
+	"STREAM_START",
+	"STREAM_START_AND_CAPTURE",
+	"STREAM_CAPTURE",
+	"STREAM_STOP",
+	"STREAM_FLUSH",
+	"STREAM_CLOSE"
+};
+
+static int handle_proxy_response(struct ipu6_isys *isys, unsigned int req_id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_fw_isys_proxy_resp_info_abi *resp;
+	int ret;
+
+	resp = ipu6_recv_get_token(isys->fwcom, IPU6_BASE_PROXY_RECV_QUEUES);
+	if (!resp)
+		return 1;
+
+	dev_dbg(dev, "Proxy response: id %u, error %u, details %u\n",
+		resp->request_id, resp->error_info.error,
+		resp->error_info.error_details);
+
+	ret = req_id == resp->request_id ? 0 : -EIO;
+
+	ipu6_recv_put_token(isys->fwcom, IPU6_BASE_PROXY_RECV_QUEUES);
+
+	return ret;
+}
+
+int ipu6_fw_isys_send_proxy_token(struct ipu6_isys *isys,
+				  unsigned int req_id,
+				  unsigned int index,
+				  unsigned int offset, u32 value)
+{
+	struct ipu6_fw_com_context *ctx = isys->fwcom;
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_fw_proxy_send_queue_token *token;
+	unsigned int timeout = 1000;
+	int ret;
+
+	dev_dbg(dev,
+		"proxy send: req_id 0x%x, index %d, offset 0x%x, value 0x%x\n",
+		req_id, index, offset, value);
+
+	token = ipu6_send_get_token(ctx, IPU6_BASE_PROXY_SEND_QUEUES);
+	if (!token)
+		return -EBUSY;
+
+	token->request_id = req_id;
+	token->region_index = index;
+	token->offset = offset;
+	token->value = value;
+	ipu6_send_put_token(ctx, IPU6_BASE_PROXY_SEND_QUEUES);
+
+	do {
+		usleep_range(100, 110);
+		ret = handle_proxy_response(isys, req_id);
+		if (!ret)
+			break;
+		if (ret == -EIO) {
+			dev_err(dev, "Proxy respond with unexpected id\n");
+			break;
+		}
+		timeout--;
+	} while (ret && timeout);
+
+	if (!timeout)
+		dev_err(dev, "Proxy response timed out\n");
+
+	return ret;
+}
+
+int ipu6_fw_isys_complex_cmd(struct ipu6_isys *isys,
+			     const unsigned int stream_handle,
+			     void *cpu_mapped_buf,
+			     dma_addr_t dma_mapped_buf,
+			     size_t size, u16 send_type)
+{
+	struct ipu6_fw_com_context *ctx = isys->fwcom;
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_fw_send_queue_token *token;
+
+	if (send_type >= N_IPU6_FW_ISYS_SEND_TYPE)
+		return -EINVAL;
+
+	dev_dbg(dev, "send_token: %s\n", send_msg_types[send_type]);
+
+	/*
+	 * Time to flush cache in case we have some payload. Not all messages
+	 * have that
+	 */
+	if (cpu_mapped_buf)
+		clflush_cache_range(cpu_mapped_buf, size);
+
+	token = ipu6_send_get_token(ctx,
+				    stream_handle + IPU6_BASE_MSG_SEND_QUEUES);
+	if (!token)
+		return -EBUSY;
+
+	token->payload = dma_mapped_buf;
+	token->buf_handle = (unsigned long)cpu_mapped_buf;
+	token->send_type = send_type;
+
+	ipu6_send_put_token(ctx, stream_handle + IPU6_BASE_MSG_SEND_QUEUES);
+
+	return 0;
+}
+
+int ipu6_fw_isys_simple_cmd(struct ipu6_isys *isys,
+			    const unsigned int stream_handle, u16 send_type)
+{
+	return ipu6_fw_isys_complex_cmd(isys, stream_handle, NULL, 0, 0,
+					send_type);
+}
+
+int ipu6_fw_isys_close(struct ipu6_isys *isys)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	int retry = IPU6_ISYS_CLOSE_RETRY;
+	unsigned long flags;
+	void *fwcom;
+	int ret;
+
+	/*
+	 * Stop the isys fw. Actual close takes
+	 * some time as the FW must stop its actions including code fetch
+	 * to SP icache.
+	 * spinlock to wait the interrupt handler to be finished
+	 */
+	spin_lock_irqsave(&isys->power_lock, flags);
+	ret = ipu6_fw_com_close(isys->fwcom);
+	fwcom = isys->fwcom;
+	isys->fwcom = NULL;
+	spin_unlock_irqrestore(&isys->power_lock, flags);
+	if (ret)
+		dev_err(dev, "Device close failure: %d\n", ret);
+
+	/* release probably fails if the close failed. Let's try still */
+	do {
+		usleep_range(400, 500);
+		ret = ipu6_fw_com_release(fwcom, 0);
+		retry--;
+	} while (ret && retry);
+
+	if (ret) {
+		dev_err(dev, "Device release time out %d\n", ret);
+		spin_lock_irqsave(&isys->power_lock, flags);
+		isys->fwcom = fwcom;
+		spin_unlock_irqrestore(&isys->power_lock, flags);
+	}
+
+	return ret;
+}
+
+void ipu6_fw_isys_cleanup(struct ipu6_isys *isys)
+{
+	int ret;
+
+	ret = ipu6_fw_com_release(isys->fwcom, 1);
+	if (ret < 0)
+		dev_warn(&isys->adev->auxdev.dev,
+			 "Device busy, fw_com release failed.");
+	isys->fwcom = NULL;
+}
+
+static void start_sp(struct ipu6_bus_device *adev)
+{
+	struct ipu6_isys *isys = ipu6_bus_get_drvdata(adev);
+	void __iomem *spc_regs_base = isys->pdata->base +
+		isys->pdata->ipdata->hw_variant.spc_offset;
+	u32 val = IPU6_ISYS_SPC_STATUS_START |
+		IPU6_ISYS_SPC_STATUS_RUN |
+		IPU6_ISYS_SPC_STATUS_CTRL_ICACHE_INVALIDATE;
+
+	val |= isys->icache_prefetch ? IPU6_ISYS_SPC_STATUS_ICACHE_PREFETCH : 0;
+
+	writel(val, spc_regs_base + IPU6_ISYS_REG_SPC_STATUS_CTRL);
+}
+
+static int query_sp(struct ipu6_bus_device *adev)
+{
+	struct ipu6_isys *isys = ipu6_bus_get_drvdata(adev);
+	void __iomem *spc_regs_base = isys->pdata->base +
+		isys->pdata->ipdata->hw_variant.spc_offset;
+	u32 val;
+
+	val = readl(spc_regs_base + IPU6_ISYS_REG_SPC_STATUS_CTRL);
+	/* return true when READY == 1, START == 0 */
+	val &= IPU6_ISYS_SPC_STATUS_READY | IPU6_ISYS_SPC_STATUS_START;
+
+	return val == IPU6_ISYS_SPC_STATUS_READY;
+}
+
+static int ipu6_isys_fwcom_cfg_init(struct ipu6_isys *isys,
+				    struct ipu6_fw_com_cfg *fwcom,
+				    unsigned int num_streams)
+{
+	unsigned int max_send_queues, max_sram_blocks, max_devq_size;
+	struct ipu6_fw_syscom_queue_config *input_queue_cfg;
+	struct ipu6_fw_syscom_queue_config *output_queue_cfg;
+	struct device *dev = &isys->adev->auxdev.dev;
+	int type_proxy = IPU6_FW_ISYS_QUEUE_TYPE_PROXY;
+	int type_dev = IPU6_FW_ISYS_QUEUE_TYPE_DEV;
+	int type_msg = IPU6_FW_ISYS_QUEUE_TYPE_MSG;
+	int base_dev_send = IPU6_BASE_DEV_SEND_QUEUES;
+	int base_msg_send = IPU6_BASE_MSG_SEND_QUEUES;
+	int base_msg_recv = IPU6_BASE_MSG_RECV_QUEUES;
+	struct ipu6_fw_isys_fw_config *isys_fw_cfg;
+	u32 num_in_message_queues;
+	unsigned int max_streams;
+	unsigned int size;
+	unsigned int i;
+
+	max_streams = isys->pdata->ipdata->max_streams;
+	max_send_queues = isys->pdata->ipdata->max_send_queues;
+	max_sram_blocks = isys->pdata->ipdata->max_sram_blocks;
+	max_devq_size = isys->pdata->ipdata->max_devq_size;
+	num_in_message_queues = clamp(num_streams, 1U, max_streams);
+	isys_fw_cfg = devm_kzalloc(dev, sizeof(*isys_fw_cfg), GFP_KERNEL);
+	if (!isys_fw_cfg)
+		return -ENOMEM;
+
+	isys_fw_cfg->num_send_queues[type_proxy] = IPU6_N_MAX_PROXY_SEND_QUEUES;
+	isys_fw_cfg->num_send_queues[type_dev] = IPU6_N_MAX_DEV_SEND_QUEUES;
+	isys_fw_cfg->num_send_queues[type_msg] = num_in_message_queues;
+	isys_fw_cfg->num_recv_queues[type_proxy] = IPU6_N_MAX_PROXY_RECV_QUEUES;
+	/* Common msg/dev return queue */
+	isys_fw_cfg->num_recv_queues[type_dev] = 0;
+	isys_fw_cfg->num_recv_queues[type_msg] = 1;
+
+	size = sizeof(*input_queue_cfg) * max_send_queues;
+	input_queue_cfg = devm_kzalloc(dev, size, GFP_KERNEL);
+	if (!input_queue_cfg)
+		return -ENOMEM;
+
+	size = sizeof(*output_queue_cfg) * IPU6_N_MAX_RECV_QUEUES;
+	output_queue_cfg = devm_kzalloc(dev, size, GFP_KERNEL);
+	if (!output_queue_cfg)
+		return -ENOMEM;
+
+	fwcom->input = input_queue_cfg;
+	fwcom->output = output_queue_cfg;
+
+	fwcom->num_input_queues = isys_fw_cfg->num_send_queues[type_proxy] +
+		isys_fw_cfg->num_send_queues[type_dev] +
+		isys_fw_cfg->num_send_queues[type_msg];
+
+	fwcom->num_output_queues = isys_fw_cfg->num_recv_queues[type_proxy] +
+		isys_fw_cfg->num_recv_queues[type_dev] +
+		isys_fw_cfg->num_recv_queues[type_msg];
+
+	/* SRAM partitioning. Equal partitioning is set. */
+	for (i = 0; i < max_sram_blocks; i++) {
+		if (i < num_in_message_queues)
+			isys_fw_cfg->buffer_partition.num_gda_pages[i] =
+				(IPU6_DEVICE_GDA_NR_PAGES *
+				 IPU6_DEVICE_GDA_VIRT_FACTOR) /
+				num_in_message_queues;
+		else
+			isys_fw_cfg->buffer_partition.num_gda_pages[i] = 0;
+	}
+
+	/* FW assumes proxy interface at fwcom queue 0 */
+	for (i = 0; i < isys_fw_cfg->num_send_queues[type_proxy]; i++) {
+		input_queue_cfg[i].token_size =
+			sizeof(struct ipu6_fw_proxy_send_queue_token);
+		input_queue_cfg[i].queue_size = IPU6_ISYS_SIZE_PROXY_SEND_QUEUE;
+	}
+
+	for (i = 0; i < isys_fw_cfg->num_send_queues[type_dev]; i++) {
+		input_queue_cfg[base_dev_send + i].token_size =
+			sizeof(struct ipu6_fw_send_queue_token);
+		input_queue_cfg[base_dev_send + i].queue_size = max_devq_size;
+	}
+
+	for (i = 0; i < isys_fw_cfg->num_send_queues[type_msg]; i++) {
+		input_queue_cfg[base_msg_send + i].token_size =
+			sizeof(struct ipu6_fw_send_queue_token);
+		input_queue_cfg[base_msg_send + i].queue_size =
+			IPU6_ISYS_SIZE_SEND_QUEUE;
+	}
+
+	for (i = 0; i < isys_fw_cfg->num_recv_queues[type_proxy]; i++) {
+		output_queue_cfg[i].token_size =
+			sizeof(struct ipu6_fw_proxy_resp_queue_token);
+		output_queue_cfg[i].queue_size =
+			IPU6_ISYS_SIZE_PROXY_RECV_QUEUE;
+	}
+	/* There is no recv DEV queue */
+	for (i = 0; i < isys_fw_cfg->num_recv_queues[type_msg]; i++) {
+		output_queue_cfg[base_msg_recv + i].token_size =
+			sizeof(struct ipu6_fw_resp_queue_token);
+		output_queue_cfg[base_msg_recv + i].queue_size =
+			IPU6_ISYS_SIZE_RECV_QUEUE;
+	}
+
+	fwcom->dmem_addr = isys->pdata->ipdata->hw_variant.dmem_offset;
+	fwcom->specific_addr = isys_fw_cfg;
+	fwcom->specific_size = sizeof(*isys_fw_cfg);
+
+	return 0;
+}
+
+int ipu6_fw_isys_init(struct ipu6_isys *isys, unsigned int num_streams)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	int retry = IPU6_ISYS_OPEN_RETRY;
+	struct ipu6_fw_com_cfg fwcom = {
+		.cell_start = start_sp,
+		.cell_ready = query_sp,
+		.buttress_boot_offset = SYSCOM_BUTTRESS_FW_PARAMS_ISYS_OFFSET,
+	};
+	int ret;
+
+	ipu6_isys_fwcom_cfg_init(isys, &fwcom, num_streams);
+
+	isys->fwcom = ipu6_fw_com_prepare(&fwcom, isys->adev,
+					  isys->pdata->base);
+	if (!isys->fwcom) {
+		dev_err(dev, "isys fw com prepare failed\n");
+		return -EIO;
+	}
+
+	ret = ipu6_fw_com_open(isys->fwcom);
+	if (ret) {
+		dev_err(dev, "isys fw com open failed %d\n", ret);
+		return ret;
+	}
+
+	do {
+		usleep_range(400, 500);
+		if (ipu6_fw_com_ready(isys->fwcom))
+			break;
+		retry--;
+	} while (retry > 0);
+
+	if (!retry) {
+		dev_err(dev, "isys port open ready failed %d\n", ret);
+		ipu6_fw_isys_close(isys);
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+struct ipu6_fw_isys_resp_info_abi *
+ipu6_fw_isys_get_resp(void *context, unsigned int queue)
+{
+	return ipu6_recv_get_token(context, queue);
+}
+
+void ipu6_fw_isys_put_resp(void *context, unsigned int queue)
+{
+	ipu6_recv_put_token(context, queue);
+}
+
+void ipu6_fw_isys_dump_stream_cfg(struct device *dev,
+				  struct ipu6_fw_isys_stream_cfg_data_abi *cfg)
+{
+	unsigned int i;
+
+	dev_dbg(dev, "-----------------------------------------------------\n");
+	dev_dbg(dev, "IPU6_FW_ISYS_STREAM_CFG_DATA\n");
+
+	dev_dbg(dev, "compfmt = %d\n", cfg->vc);
+	dev_dbg(dev, "src = %d\n", cfg->src);
+	dev_dbg(dev, "vc = %d\n", cfg->vc);
+	dev_dbg(dev, "isl_use = %d\n", cfg->isl_use);
+	dev_dbg(dev, "sensor_type = %d\n", cfg->sensor_type);
+
+	dev_dbg(dev, "send_irq_sof_discarded = %d\n",
+		cfg->send_irq_sof_discarded);
+	dev_dbg(dev, "send_irq_eof_discarded = %d\n",
+		cfg->send_irq_eof_discarded);
+	dev_dbg(dev, "send_resp_sof_discarded = %d\n",
+		cfg->send_resp_sof_discarded);
+	dev_dbg(dev, "send_resp_eof_discarded = %d\n",
+		cfg->send_resp_eof_discarded);
+
+	dev_dbg(dev, "crop:\n");
+	dev_dbg(dev, "\t.left_top = [%d, %d]\n", cfg->crop.left_offset,
+		cfg->crop.top_offset);
+	dev_dbg(dev, "\t.right_bottom = [%d, %d]\n", cfg->crop.right_offset,
+		cfg->crop.bottom_offset);
+
+	dev_dbg(dev, "nof_input_pins = %d\n", cfg->nof_input_pins);
+	for (i = 0; i < cfg->nof_input_pins; i++) {
+		dev_dbg(dev, "input pin[%d]:\n", i);
+		dev_dbg(dev, "\t.dt = 0x%0x\n", cfg->input_pins[i].dt);
+		dev_dbg(dev, "\t.mipi_store_mode = %d\n",
+			cfg->input_pins[i].mipi_store_mode);
+		dev_dbg(dev, "\t.bits_per_pix = %d\n",
+			cfg->input_pins[i].bits_per_pix);
+		dev_dbg(dev, "\t.mapped_dt = 0x%0x\n",
+			cfg->input_pins[i].mapped_dt);
+		dev_dbg(dev, "\t.input_res = %dx%d\n",
+			cfg->input_pins[i].input_res.width,
+			cfg->input_pins[i].input_res.height);
+		dev_dbg(dev, "\t.mipi_decompression = %d\n",
+			cfg->input_pins[i].mipi_decompression);
+		dev_dbg(dev, "\t.capture_mode = %d\n",
+			cfg->input_pins[i].capture_mode);
+	}
+
+	dev_dbg(dev, "nof_output_pins = %d\n", cfg->nof_output_pins);
+	for (i = 0; i < cfg->nof_output_pins; i++) {
+		dev_dbg(dev, "output_pin[%d]:\n", i);
+		dev_dbg(dev, "\t.input_pin_id = %d\n",
+			cfg->output_pins[i].input_pin_id);
+		dev_dbg(dev, "\t.output_res = %dx%d\n",
+			cfg->output_pins[i].output_res.width,
+			cfg->output_pins[i].output_res.height);
+		dev_dbg(dev, "\t.stride = %d\n", cfg->output_pins[i].stride);
+		dev_dbg(dev, "\t.pt = %d\n", cfg->output_pins[i].pt);
+		dev_dbg(dev, "\t.payload_buf_size = %d\n",
+			cfg->output_pins[i].payload_buf_size);
+		dev_dbg(dev, "\t.ft = %d\n", cfg->output_pins[i].ft);
+		dev_dbg(dev, "\t.watermark_in_lines = %d\n",
+			cfg->output_pins[i].watermark_in_lines);
+		dev_dbg(dev, "\t.send_irq = %d\n",
+			cfg->output_pins[i].send_irq);
+		dev_dbg(dev, "\t.reserve_compression = %d\n",
+			cfg->output_pins[i].reserve_compression);
+		dev_dbg(dev, "\t.snoopable = %d\n",
+			cfg->output_pins[i].snoopable);
+		dev_dbg(dev, "\t.error_handling_enable = %d\n",
+			cfg->output_pins[i].error_handling_enable);
+		dev_dbg(dev, "\t.sensor_type = %d\n",
+			cfg->output_pins[i].sensor_type);
+	}
+	dev_dbg(dev, "-----------------------------------------------------\n");
+}
+
+void
+ipu6_fw_isys_dump_frame_buff_set(struct device *dev,
+				 struct ipu6_fw_isys_frame_buff_set_abi *buf,
+				 unsigned int outputs)
+{
+	unsigned int i;
+
+	dev_dbg(dev, "-----------------------------------------------------\n");
+	dev_dbg(dev, "IPU6_FW_ISYS_FRAME_BUFF_SET\n");
+
+	for (i = 0; i < outputs; i++) {
+		dev_dbg(dev, "output_pin[%d]:\n", i);
+		dev_dbg(dev, "\t.out_buf_id = %llu\n",
+			buf->output_pins[i].out_buf_id);
+		dev_dbg(dev, "\t.addr = 0x%x\n", buf->output_pins[i].addr);
+		dev_dbg(dev, "\t.compress = %d\n",
+			buf->output_pins[i].compress);
+	}
+
+	dev_dbg(dev, "send_irq_sof = 0x%x\n", buf->send_irq_sof);
+	dev_dbg(dev, "send_irq_eof = 0x%x\n", buf->send_irq_eof);
+	dev_dbg(dev, "send_resp_sof = 0x%x\n", buf->send_resp_sof);
+	dev_dbg(dev, "send_resp_eof = 0x%x\n", buf->send_resp_eof);
+	dev_dbg(dev, "send_irq_capture_ack = 0x%x\n",
+		buf->send_irq_capture_ack);
+	dev_dbg(dev, "send_irq_capture_done = 0x%x\n",
+		buf->send_irq_capture_done);
+	dev_dbg(dev, "send_resp_capture_ack = 0x%x\n",
+		buf->send_resp_capture_ack);
+	dev_dbg(dev, "send_resp_capture_done = 0x%x\n",
+		buf->send_resp_capture_done);
+
+	dev_dbg(dev, "-----------------------------------------------------\n");
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-fw-isys.h

@@ -0,0 +1,596 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_FW_ISYS_H
+#define IPU6_FW_ISYS_H
+
+#include <linux/types.h>
+
+struct device;
+struct ipu6_isys;
+
+/* Max number of Input/Output Pins */
+#define IPU6_MAX_IPINS 4
+
+#define IPU6_MAX_OPINS ((IPU6_MAX_IPINS) + 1)
+
+#define IPU6_STREAM_ID_MAX 16
+#define IPU6_NONSECURE_STREAM_ID_MAX 12
+#define IPU6_DEV_SEND_QUEUE_SIZE (IPU6_STREAM_ID_MAX)
+#define IPU6_NOF_SRAM_BLOCKS_MAX (IPU6_STREAM_ID_MAX)
+#define IPU6_N_MAX_MSG_SEND_QUEUES (IPU6_STREAM_ID_MAX)
+#define IPU6SE_STREAM_ID_MAX 8
+#define IPU6SE_NONSECURE_STREAM_ID_MAX 4
+#define IPU6SE_DEV_SEND_QUEUE_SIZE (IPU6SE_STREAM_ID_MAX)
+#define IPU6SE_NOF_SRAM_BLOCKS_MAX (IPU6SE_STREAM_ID_MAX)
+#define IPU6SE_N_MAX_MSG_SEND_QUEUES (IPU6SE_STREAM_ID_MAX)
+
+/* Single return queue for all streams/commands type */
+#define IPU6_N_MAX_MSG_RECV_QUEUES 1
+/* Single device queue for high priority commands (bypass in-order queue) */
+#define IPU6_N_MAX_DEV_SEND_QUEUES 1
+/* Single dedicated send queue for proxy interface */
+#define IPU6_N_MAX_PROXY_SEND_QUEUES 1
+/* Single dedicated recv queue for proxy interface */
+#define IPU6_N_MAX_PROXY_RECV_QUEUES 1
+/* Send queues layout */
+#define IPU6_BASE_PROXY_SEND_QUEUES 0
+#define IPU6_BASE_DEV_SEND_QUEUES \
+	(IPU6_BASE_PROXY_SEND_QUEUES + IPU6_N_MAX_PROXY_SEND_QUEUES)
+#define IPU6_BASE_MSG_SEND_QUEUES \
+	(IPU6_BASE_DEV_SEND_QUEUES + IPU6_N_MAX_DEV_SEND_QUEUES)
+/* Recv queues layout */
+#define IPU6_BASE_PROXY_RECV_QUEUES 0
+#define IPU6_BASE_MSG_RECV_QUEUES \
+	(IPU6_BASE_PROXY_RECV_QUEUES + IPU6_N_MAX_PROXY_RECV_QUEUES)
+#define IPU6_N_MAX_RECV_QUEUES \
+	(IPU6_BASE_MSG_RECV_QUEUES + IPU6_N_MAX_MSG_RECV_QUEUES)
+
+#define IPU6_N_MAX_SEND_QUEUES \
+	(IPU6_BASE_MSG_SEND_QUEUES + IPU6_N_MAX_MSG_SEND_QUEUES)
+#define IPU6SE_N_MAX_SEND_QUEUES \
+	(IPU6_BASE_MSG_SEND_QUEUES + IPU6SE_N_MAX_MSG_SEND_QUEUES)
+
+/* Max number of planes for frame formats supported by the FW */
+#define IPU6_PIN_PLANES_MAX 4
+
+#define IPU6_FW_ISYS_SENSOR_TYPE_START 14
+#define IPU6_FW_ISYS_SENSOR_TYPE_END 19
+#define IPU6SE_FW_ISYS_SENSOR_TYPE_START 6
+#define IPU6SE_FW_ISYS_SENSOR_TYPE_END 11
+/*
+ * Device close takes some time from last ack message to actual stopping
+ * of the SP processor. As long as the SP processor runs we can't proceed with
+ * clean up of resources.
+ */
+#define IPU6_ISYS_OPEN_RETRY			2000
+#define IPU6_ISYS_CLOSE_RETRY			2000
+#define IPU6_FW_CALL_TIMEOUT_JIFFIES		msecs_to_jiffies(2000)
+
+enum ipu6_fw_isys_resp_type {
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_OPEN_DONE = 0,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_START_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_START_AND_CAPTURE_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_CAPTURE_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_STOP_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_FLUSH_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_CLOSE_ACK,
+	IPU6_FW_ISYS_RESP_TYPE_PIN_DATA_READY,
+	IPU6_FW_ISYS_RESP_TYPE_PIN_DATA_WATERMARK,
+	IPU6_FW_ISYS_RESP_TYPE_FRAME_SOF,
+	IPU6_FW_ISYS_RESP_TYPE_FRAME_EOF,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_START_AND_CAPTURE_DONE,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_CAPTURE_DONE,
+	IPU6_FW_ISYS_RESP_TYPE_PIN_DATA_SKIPPED,
+	IPU6_FW_ISYS_RESP_TYPE_STREAM_CAPTURE_SKIPPED,
+	IPU6_FW_ISYS_RESP_TYPE_FRAME_SOF_DISCARDED,
+	IPU6_FW_ISYS_RESP_TYPE_FRAME_EOF_DISCARDED,
+	IPU6_FW_ISYS_RESP_TYPE_STATS_DATA_READY,
+	N_IPU6_FW_ISYS_RESP_TYPE
+};
+
+enum ipu6_fw_isys_send_type {
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_OPEN = 0,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_START,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_START_AND_CAPTURE,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_CAPTURE,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_STOP,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_FLUSH,
+	IPU6_FW_ISYS_SEND_TYPE_STREAM_CLOSE,
+	N_IPU6_FW_ISYS_SEND_TYPE
+};
+
+enum ipu6_fw_isys_queue_type {
+	IPU6_FW_ISYS_QUEUE_TYPE_PROXY = 0,
+	IPU6_FW_ISYS_QUEUE_TYPE_DEV,
+	IPU6_FW_ISYS_QUEUE_TYPE_MSG,
+	N_IPU6_FW_ISYS_QUEUE_TYPE
+};
+
+enum ipu6_fw_isys_stream_source {
+	IPU6_FW_ISYS_STREAM_SRC_PORT_0 = 0,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_1,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_2,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_3,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_4,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_5,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_6,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_7,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_8,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_9,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_10,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_11,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_12,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_13,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_14,
+	IPU6_FW_ISYS_STREAM_SRC_PORT_15,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_0,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_1,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_2,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_3,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_4,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_5,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_6,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_7,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_8,
+	IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_9,
+	N_IPU6_FW_ISYS_STREAM_SRC
+};
+
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_PORT0 IPU6_FW_ISYS_STREAM_SRC_PORT_0
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_PORT1 IPU6_FW_ISYS_STREAM_SRC_PORT_1
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_PORT2 IPU6_FW_ISYS_STREAM_SRC_PORT_2
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_PORT3 IPU6_FW_ISYS_STREAM_SRC_PORT_3
+
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_PORTA IPU6_FW_ISYS_STREAM_SRC_PORT_4
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_PORTB IPU6_FW_ISYS_STREAM_SRC_PORT_5
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_CPHY_PORT0 \
+	IPU6_FW_ISYS_STREAM_SRC_PORT_6
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_CPHY_PORT1 \
+	IPU6_FW_ISYS_STREAM_SRC_PORT_7
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_CPHY_PORT2 \
+	IPU6_FW_ISYS_STREAM_SRC_PORT_8
+#define IPU6_FW_ISYS_STREAM_SRC_CSI2_3PH_CPHY_PORT3 \
+	IPU6_FW_ISYS_STREAM_SRC_PORT_9
+
+#define IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_PORT0 IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_0
+#define IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_PORT1 IPU6_FW_ISYS_STREAM_SRC_MIPIGEN_1
+
+/*
+ * enum ipu6_fw_isys_mipi_vc: MIPI csi2 spec
+ * supports up to 4 virtual per physical channel
+ */
+enum ipu6_fw_isys_mipi_vc {
+	IPU6_FW_ISYS_MIPI_VC_0 = 0,
+	IPU6_FW_ISYS_MIPI_VC_1,
+	IPU6_FW_ISYS_MIPI_VC_2,
+	IPU6_FW_ISYS_MIPI_VC_3,
+	N_IPU6_FW_ISYS_MIPI_VC
+};
+
+enum ipu6_fw_isys_frame_format_type {
+	IPU6_FW_ISYS_FRAME_FORMAT_NV11 = 0, /* 12 bit YUV 411, Y, UV plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_NV12,	/* 12 bit YUV 420, Y, UV plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_NV12_16, /* 16 bit YUV 420, Y, UV plane */
+	/* 12 bit YUV 420, Intel proprietary tiled format */
+	IPU6_FW_ISYS_FRAME_FORMAT_NV12_TILEY,
+
+	IPU6_FW_ISYS_FRAME_FORMAT_NV16,	/* 16 bit YUV 422, Y, UV plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_NV21,	/* 12 bit YUV 420, Y, VU plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_NV61,	/* 16 bit YUV 422, Y, VU plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_YV12,	/* 12 bit YUV 420, Y, V, U plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_YV16,	/* 16 bit YUV 422, Y, V, U plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV420, /* 12 bit YUV 420, Y, U, V plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV420_10, /* yuv420, 10 bits per subpixel */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV420_12, /* yuv420, 12 bits per subpixel */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV420_14, /* yuv420, 14 bits per subpixel */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV420_16, /* yuv420, 16 bits per subpixel */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV422, /* 16 bit YUV 422, Y, U, V plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV422_16, /* yuv422, 16 bits per subpixel */
+	IPU6_FW_ISYS_FRAME_FORMAT_UYVY,	/* 16 bit YUV 422, UYVY interleaved */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUYV,	/* 16 bit YUV 422, YUYV interleaved */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV444, /* 24 bit YUV 444, Y, U, V plane */
+	/* Internal format, 2 y lines followed by a uvinterleaved line */
+	IPU6_FW_ISYS_FRAME_FORMAT_YUV_LINE,
+	IPU6_FW_ISYS_FRAME_FORMAT_RAW8,	/* RAW8, 1 plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_RAW10, /* RAW10, 1 plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_RAW12, /* RAW12, 1 plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_RAW14, /* RAW14, 1 plane */
+	IPU6_FW_ISYS_FRAME_FORMAT_RAW16, /* RAW16, 1 plane */
+	/**
+	 * 16 bit RGB, 1 plane. Each 3 sub pixels are packed into one 16 bit
+	 * value, 5 bits for R, 6 bits for G and 5 bits for B.
+	 */
+	IPU6_FW_ISYS_FRAME_FORMAT_RGB565,
+	IPU6_FW_ISYS_FRAME_FORMAT_PLANAR_RGB888, /* 24 bit RGB, 3 planes */
+	IPU6_FW_ISYS_FRAME_FORMAT_RGBA888, /* 32 bit RGBA, 1 plane, A=Alpha */
+	IPU6_FW_ISYS_FRAME_FORMAT_QPLANE6, /* Internal, for advanced ISP */
+	IPU6_FW_ISYS_FRAME_FORMAT_BINARY_8, /* byte stream, used for jpeg. */
+	N_IPU6_FW_ISYS_FRAME_FORMAT
+};
+
+enum ipu6_fw_isys_pin_type {
+	/* captured as MIPI packets */
+	IPU6_FW_ISYS_PIN_TYPE_MIPI = 0,
+	/* captured through the SoC path */
+	IPU6_FW_ISYS_PIN_TYPE_RAW_SOC = 3,
+};
+
+/*
+ * enum ipu6_fw_isys_mipi_store_mode. Describes if long MIPI packets reach
+ * MIPI SRAM with the long packet header or
+ * if not, then only option is to capture it with pin type MIPI.
+ */
+enum ipu6_fw_isys_mipi_store_mode {
+	IPU6_FW_ISYS_MIPI_STORE_MODE_NORMAL = 0,
+	IPU6_FW_ISYS_MIPI_STORE_MODE_DISCARD_LONG_HEADER,
+	N_IPU6_FW_ISYS_MIPI_STORE_MODE
+};
+
+enum ipu6_fw_isys_capture_mode {
+	IPU6_FW_ISYS_CAPTURE_MODE_REGULAR = 0,
+	IPU6_FW_ISYS_CAPTURE_MODE_BURST,
+	N_IPU6_FW_ISYS_CAPTURE_MODE,
+};
+
+enum ipu6_fw_isys_sensor_mode {
+	IPU6_FW_ISYS_SENSOR_MODE_NORMAL = 0,
+	IPU6_FW_ISYS_SENSOR_MODE_TOBII,
+	N_IPU6_FW_ISYS_SENSOR_MODE,
+};
+
+enum ipu6_fw_isys_error {
+	IPU6_FW_ISYS_ERROR_NONE = 0,
+	IPU6_FW_ISYS_ERROR_FW_INTERNAL_CONSISTENCY,
+	IPU6_FW_ISYS_ERROR_HW_CONSISTENCY,
+	IPU6_FW_ISYS_ERROR_DRIVER_INVALID_COMMAND_SEQUENCE,
+	IPU6_FW_ISYS_ERROR_DRIVER_INVALID_DEVICE_CONFIGURATION,
+	IPU6_FW_ISYS_ERROR_DRIVER_INVALID_STREAM_CONFIGURATION,
+	IPU6_FW_ISYS_ERROR_DRIVER_INVALID_FRAME_CONFIGURATION,
+	IPU6_FW_ISYS_ERROR_INSUFFICIENT_RESOURCES,
+	IPU6_FW_ISYS_ERROR_HW_REPORTED_STR2MMIO,
+	IPU6_FW_ISYS_ERROR_HW_REPORTED_SIG2CIO,
+	IPU6_FW_ISYS_ERROR_SENSOR_FW_SYNC,
+	IPU6_FW_ISYS_ERROR_STREAM_IN_SUSPENSION,
+	IPU6_FW_ISYS_ERROR_RESPONSE_QUEUE_FULL,
+	N_IPU6_FW_ISYS_ERROR
+};
+
+enum ipu6_fw_proxy_error {
+	IPU6_FW_PROXY_ERROR_NONE = 0,
+	IPU6_FW_PROXY_ERROR_INVALID_WRITE_REGION,
+	IPU6_FW_PROXY_ERROR_INVALID_WRITE_OFFSET,
+	N_IPU6_FW_PROXY_ERROR
+};
+
+/* firmware ABI structure below are aligned in firmware, no need pack */
+struct ipu6_fw_isys_buffer_partition_abi {
+	u32 num_gda_pages[IPU6_STREAM_ID_MAX];
+};
+
+struct ipu6_fw_isys_fw_config {
+	struct ipu6_fw_isys_buffer_partition_abi buffer_partition;
+	u32 num_send_queues[N_IPU6_FW_ISYS_QUEUE_TYPE];
+	u32 num_recv_queues[N_IPU6_FW_ISYS_QUEUE_TYPE];
+};
+
+/*
+ * struct ipu6_fw_isys_resolution_abi: Generic resolution structure.
+ */
+struct ipu6_fw_isys_resolution_abi {
+	u32 width;
+	u32 height;
+};
+
+/**
+ * struct ipu6_fw_isys_output_pin_payload_abi - ISYS output pin buffer
+ * @out_buf_id: Points to output pin buffer - buffer identifier
+ * @addr: Points to output pin buffer - CSS Virtual Address
+ * @compress: Request frame compression (1), or  not (0)
+ */
+struct ipu6_fw_isys_output_pin_payload_abi {
+	u64 out_buf_id;
+	u32 addr;
+	u32 compress;
+};
+
+/**
+ * struct ipu6_fw_isys_output_pin_info_abi - ISYS output pin info
+ * @output_res: output pin resolution
+ * @stride: output stride in Bytes (not valid for statistics)
+ * @watermark_in_lines: pin watermark level in lines
+ * @payload_buf_size: minimum size in Bytes of all buffers that will be
+ *			supplied for capture on this pin
+ * @ts_offsets: ts_offsets
+ * @s2m_pixel_soc_pixel_remapping: pixel soc remapping (see the definition of
+ *				   S2M_PIXEL_SOC_PIXEL_REMAPPING_FLAG_NO_REMAPPING)
+ * @csi_be_soc_pixel_remapping: see s2m_pixel_soc_pixel_remapping
+ * @send_irq: assert if pin event should trigger irq
+ * @input_pin_id: related input pin id
+ * @pt: pin type -real format "enum ipu6_fw_isys_pin_type"
+ * @ft: frame format type -real format "enum ipu6_fw_isys_frame_format_type"
+ * @reserved: a reserved field
+ * @reserve_compression: reserve compression resources for pin
+ * @snoopable: snoopable
+ * @error_handling_enable: enable error handling
+ * @sensor_type: sensor_type
+ */
+struct ipu6_fw_isys_output_pin_info_abi {
+	struct ipu6_fw_isys_resolution_abi output_res;
+	u32 stride;
+	u32 watermark_in_lines;
+	u32 payload_buf_size;
+	u32 ts_offsets[IPU6_PIN_PLANES_MAX];
+	u32 s2m_pixel_soc_pixel_remapping;
+	u32 csi_be_soc_pixel_remapping;
+	u8 send_irq;
+	u8 input_pin_id;
+	u8 pt;
+	u8 ft;
+	u8 reserved;
+	u8 reserve_compression;
+	u8 snoopable;
+	u8 error_handling_enable;
+	u32 sensor_type;
+};
+
+/**
+ * struct ipu6_fw_isys_input_pin_info_abi - ISYS input pin info
+ * @input_res: input resolution
+ * @dt: mipi data type ((enum ipu6_fw_isys_mipi_data_type)
+ * @mipi_store_mode: defines if legacy long packet header will be stored or
+ *		     discarded if discarded, output pin type for this
+ *		     input pin can only be MIPI
+ *		     (enum ipu6_fw_isys_mipi_store_mode)
+ * @bits_per_pix: native bits per pixel
+ * @mapped_dt: actual data type from sensor
+ * @mipi_decompression: defines which compression will be in mipi backend
+ * @crop_first_and_last_lines: Control whether to crop the first and last line
+ *			       of the input image. Crop done by HW device.
+ * @capture_mode: mode of capture, regular or burst, default value is regular
+ * @reserved: a reserved field
+ */
+struct ipu6_fw_isys_input_pin_info_abi {
+	struct ipu6_fw_isys_resolution_abi input_res;
+	u8 dt;
+	u8 mipi_store_mode;
+	u8 bits_per_pix;
+	u8 mapped_dt;
+	u8 mipi_decompression;
+	u8 crop_first_and_last_lines;
+	u8 capture_mode;
+	u8 reserved;
+};
+
+/**
+ * struct ipu6_fw_isys_cropping_abi - ISYS cropping coordinates
+ * @top_offset: Top offset
+ * @left_offset: Left offset
+ * @bottom_offset: Bottom offset
+ * @right_offset: Right offset
+ */
+struct ipu6_fw_isys_cropping_abi {
+	s32 top_offset;
+	s32 left_offset;
+	s32 bottom_offset;
+	s32 right_offset;
+};
+
+/**
+ * struct ipu6_fw_isys_stream_cfg_data_abi - ISYS stream configuration data
+ * ISYS stream configuration data structure
+ * @crop: for extended use and is not used in FW currently
+ * @input_pins: input pin descriptors
+ * @output_pins: output pin descriptors
+ * @compfmt: de-compression setting for User Defined Data
+ * @nof_input_pins: number of input pins
+ * @nof_output_pins: number of output pins
+ * @send_irq_sof_discarded: send irq on discarded frame sof response
+ *		- if '1' it will override the send_resp_sof_discarded
+ *		  and send the response
+ *		- if '0' the send_resp_sof_discarded will determine
+ *		  whether to send the response
+ * @send_irq_eof_discarded: send irq on discarded frame eof response
+ *		- if '1' it will override the send_resp_eof_discarded
+ *		  and send the response
+ *		- if '0' the send_resp_eof_discarded will determine
+ *		  whether to send the response
+ * @send_resp_sof_discarded: send response for discarded frame sof detected,
+ *			     used only when send_irq_sof_discarded is '0'
+ * @send_resp_eof_discarded: send response for discarded frame eof detected,
+ *			     used only when send_irq_eof_discarded is '0'
+ * @src: Stream source index e.g. MIPI_generator_0, CSI2-rx_1
+ * @vc: MIPI Virtual Channel (up to 4 virtual per physical channel)
+ * @isl_use: indicates whether stream requires ISL and how
+ * @sensor_type: type of connected sensor, tobii or others, default is 0
+ * @reserved: a reserved field
+ * @reserved2: a reserved field
+ */
+struct ipu6_fw_isys_stream_cfg_data_abi {
+	struct ipu6_fw_isys_cropping_abi crop;
+	struct ipu6_fw_isys_input_pin_info_abi input_pins[IPU6_MAX_IPINS];
+	struct ipu6_fw_isys_output_pin_info_abi output_pins[IPU6_MAX_OPINS];
+	u32 compfmt;
+	u8 nof_input_pins;
+	u8 nof_output_pins;
+	u8 send_irq_sof_discarded;
+	u8 send_irq_eof_discarded;
+	u8 send_resp_sof_discarded;
+	u8 send_resp_eof_discarded;
+	u8 src;
+	u8 vc;
+	u8 isl_use;
+	u8 sensor_type;
+	u8 reserved;
+	u8 reserved2;
+};
+
+/**
+ * struct ipu6_fw_isys_frame_buff_set_abi - ISYS frame buffer set (request)
+ * @output_pins: output pin addresses
+ * @send_irq_sof: send irq on frame sof response
+ *		- if '1' it will override the send_resp_sof and
+ *		  send the response
+ *		- if '0' the send_resp_sof will determine whether to
+ *		  send the response
+ * @send_irq_eof: send irq on frame eof response
+ *		- if '1' it will override the send_resp_eof and
+ *		  send the response
+ *		- if '0' the send_resp_eof will determine whether to
+ *		  send the response
+ * @send_irq_capture_ack: send irq on capture ack
+ * @send_irq_capture_done: send irq on capture done
+ * @send_resp_sof: send response for frame sof detected,
+ *		   used only when send_irq_sof is '0'
+ * @send_resp_eof: send response for frame eof detected,
+ *		   used only when send_irq_eof is '0'
+ * @send_resp_capture_ack: send response for capture ack event
+ * @send_resp_capture_done: send response for capture done event
+ * @reserved: a reserved field
+ */
+struct ipu6_fw_isys_frame_buff_set_abi {
+	struct ipu6_fw_isys_output_pin_payload_abi output_pins[IPU6_MAX_OPINS];
+	u8 send_irq_sof;
+	u8 send_irq_eof;
+	u8 send_irq_capture_ack;
+	u8 send_irq_capture_done;
+	u8 send_resp_sof;
+	u8 send_resp_eof;
+	u8 send_resp_capture_ack;
+	u8 send_resp_capture_done;
+	u8 reserved[8];
+};
+
+/**
+ * struct ipu6_fw_isys_error_info_abi - ISYS error information
+ * @error: error code if something went wrong
+ * @error_details: depending on error code, it may contain additional error info
+ */
+struct ipu6_fw_isys_error_info_abi {
+	u32 error;
+	u32 error_details;
+};
+
+/**
+ * struct ipu6_fw_isys_resp_info_abi - ISYS firmware response
+ * @buf_id: buffer ID
+ * @pin: this var is only valid for pin event related responses,
+ *     contains pin addresses
+ * @error_info: error information from the FW
+ * @timestamp: Time information for event if available
+ * @stream_handle: stream id the response corresponds to
+ * @type: response type (enum ipu6_fw_isys_resp_type)
+ * @pin_id: pin id that the pin payload corresponds to
+ * @reserved: a reserved field
+ * @reserved2: a reserved field
+ */
+struct ipu6_fw_isys_resp_info_abi {
+	u64 buf_id;
+	struct ipu6_fw_isys_output_pin_payload_abi pin;
+	struct ipu6_fw_isys_error_info_abi error_info;
+	u32 timestamp[2];
+	u8 stream_handle;
+	u8 type;
+	u8 pin_id;
+	u8 reserved;
+	u32 reserved2;
+};
+
+/**
+ * struct ipu6_fw_isys_proxy_error_info_abi - ISYS proxy error
+ * @error: error code if something went wrong
+ * @error_details: depending on error code, it may contain additional error info
+ */
+struct ipu6_fw_isys_proxy_error_info_abi {
+	u32 error;
+	u32 error_details;
+};
+
+struct ipu6_fw_isys_proxy_resp_info_abi {
+	u32 request_id;
+	struct ipu6_fw_isys_proxy_error_info_abi error_info;
+};
+
+/**
+ * struct ipu6_fw_proxy_write_queue_token - ISYS proxy write queue token
+ * @request_id: update id for the specific proxy write request
+ * @region_index: Region id for the proxy write request
+ * @offset: Offset of the write request according to the base address
+ *	    of the region
+ * @value: Value that is requested to be written with the proxy write request
+ */
+struct ipu6_fw_proxy_write_queue_token {
+	u32 request_id;
+	u32 region_index;
+	u32 offset;
+	u32 value;
+};
+
+/**
+ * struct ipu6_fw_resp_queue_token - ISYS response queue token
+ * @resp_info: response info
+ */
+struct ipu6_fw_resp_queue_token {
+	struct ipu6_fw_isys_resp_info_abi resp_info;
+};
+
+/**
+ * struct ipu6_fw_send_queue_token - ISYS send queue token
+ * @buf_handle: buffer handle
+ * @payload: payload
+ * @send_type: send_type
+ * @stream_id: stream_id
+ */
+struct ipu6_fw_send_queue_token {
+	u64 buf_handle;
+	u32 payload;
+	u16 send_type;
+	u16 stream_id;
+};
+
+/**
+ * struct ipu6_fw_proxy_resp_queue_token - ISYS proxy response queue token
+ * @proxy_resp_info: proxy response info
+ */
+struct ipu6_fw_proxy_resp_queue_token {
+	struct ipu6_fw_isys_proxy_resp_info_abi proxy_resp_info;
+};
+
+/**
+ * struct ipu6_fw_proxy_send_queue_token - SYS proxy send queue token
+ * @request_id: request_id
+ * @region_index: region_index
+ * @offset: offset
+ * @value: value
+ */
+struct ipu6_fw_proxy_send_queue_token {
+	u32 request_id;
+	u32 region_index;
+	u32 offset;
+	u32 value;
+};
+
+void
+ipu6_fw_isys_dump_stream_cfg(struct device *dev,
+			     struct ipu6_fw_isys_stream_cfg_data_abi *cfg);
+void
+ipu6_fw_isys_dump_frame_buff_set(struct device *dev,
+				 struct ipu6_fw_isys_frame_buff_set_abi *buf,
+				 unsigned int outputs);
+int ipu6_fw_isys_init(struct ipu6_isys *isys, unsigned int num_streams);
+int ipu6_fw_isys_close(struct ipu6_isys *isys);
+int ipu6_fw_isys_simple_cmd(struct ipu6_isys *isys,
+			    const unsigned int stream_handle, u16 send_type);
+int ipu6_fw_isys_complex_cmd(struct ipu6_isys *isys,
+			     const unsigned int stream_handle,
+			     void *cpu_mapped_buf, dma_addr_t dma_mapped_buf,
+			     size_t size, u16 send_type);
+int ipu6_fw_isys_send_proxy_token(struct ipu6_isys *isys,
+				  unsigned int req_id,
+				  unsigned int index,
+				  unsigned int offset, u32 value);
+void ipu6_fw_isys_cleanup(struct ipu6_isys *isys);
+struct ipu6_fw_isys_resp_info_abi *
+ipu6_fw_isys_get_resp(void *context, unsigned int queue);
+void ipu6_fw_isys_put_resp(void *context, unsigned int queue);
+#endif

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-csi2.c

@@ -0,0 +1,647 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/minmax.h>
+#include <linux/sprintf.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-subdev.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-isys.h"
+#include "ipu6-isys-csi2.h"
+#include "ipu6-isys-subdev.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+
+static const u32 csi2_supported_codes[] = {
+	MEDIA_BUS_FMT_RGB565_1X16,
+	MEDIA_BUS_FMT_RGB888_1X24,
+	MEDIA_BUS_FMT_UYVY8_1X16,
+	MEDIA_BUS_FMT_YUYV8_1X16,
+	MEDIA_BUS_FMT_SBGGR10_1X10,
+	MEDIA_BUS_FMT_SGBRG10_1X10,
+	MEDIA_BUS_FMT_SGRBG10_1X10,
+	MEDIA_BUS_FMT_SRGGB10_1X10,
+	MEDIA_BUS_FMT_SBGGR12_1X12,
+	MEDIA_BUS_FMT_SGBRG12_1X12,
+	MEDIA_BUS_FMT_SGRBG12_1X12,
+	MEDIA_BUS_FMT_SRGGB12_1X12,
+	MEDIA_BUS_FMT_SBGGR8_1X8,
+	MEDIA_BUS_FMT_SGBRG8_1X8,
+	MEDIA_BUS_FMT_SGRBG8_1X8,
+	MEDIA_BUS_FMT_SRGGB8_1X8,
+	MEDIA_BUS_FMT_Y8_1X8,
+	MEDIA_BUS_FMT_Y10_1X10,
+	MEDIA_BUS_FMT_Y12_1X12,
+	MEDIA_BUS_FMT_Y16_1X16,
+	MEDIA_BUS_FMT_META_8,
+	MEDIA_BUS_FMT_META_10,
+	MEDIA_BUS_FMT_META_12,
+	MEDIA_BUS_FMT_META_16,
+	MEDIA_BUS_FMT_META_24,
+	0
+};
+
+/*
+ * Strings corresponding to CSI-2 receiver errors are here.
+ * Corresponding macros are defined in the header file.
+ */
+static const struct ipu6_csi2_error dphy_rx_errors[] = {
+	{ "Single packet header error corrected", true },
+	{ "Multiple packet header errors detected", true },
+	{ "Payload checksum (CRC) error", true },
+	{ "Transfer FIFO overflow", false },
+	{ "Reserved short packet data type detected", true },
+	{ "Reserved long packet data type detected", true },
+	{ "Incomplete long packet detected", false },
+	{ "Frame sync error", false },
+	{ "Line sync error", false },
+	{ "DPHY recoverable synchronization error", true },
+	{ "DPHY fatal error", false },
+	{ "DPHY elastic FIFO overflow", false },
+	{ "Inter-frame short packet discarded", true },
+	{ "Inter-frame long packet discarded", true },
+	{ "MIPI pktgen overflow", false },
+	{ "MIPI pktgen data loss", false },
+	{ "FIFO overflow", false },
+	{ "Lane deskew", false },
+	{ "SOT sync error", false },
+	{ "HSIDLE detected", false }
+};
+
+s64 ipu6_isys_csi2_get_link_freq(struct ipu6_isys_csi2 *csi2)
+{
+	struct media_pad *src_pad;
+
+	if (!csi2)
+		return -EINVAL;
+
+	src_pad = media_pad_remote_pad_unique(&csi2->asd.sd.entity.pads[CSI2_PAD_SINK]);
+	if (IS_ERR(src_pad)) {
+		dev_err(&csi2->isys->adev->auxdev.dev,
+			"can't get source pad of %s (%pe)\n",
+			csi2->asd.sd.name, src_pad);
+		return PTR_ERR(src_pad);
+	}
+
+	return v4l2_get_link_freq(src_pad, 0, 0);
+}
+
+static int csi2_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+				struct v4l2_event_subscription *sub)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	struct ipu6_isys_csi2 *csi2 = to_ipu6_isys_csi2(asd);
+	struct device *dev = &csi2->isys->adev->auxdev.dev;
+
+	dev_dbg(dev, "csi2 subscribe event(type %u id %u)\n",
+		sub->type, sub->id);
+
+	switch (sub->type) {
+	case V4L2_EVENT_FRAME_SYNC:
+		return v4l2_event_subscribe(fh, sub, 10, NULL);
+	case V4L2_EVENT_CTRL:
+		return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct v4l2_subdev_core_ops csi2_sd_core_ops = {
+	.subscribe_event = csi2_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+/*
+ * The input system CSI2+ receiver has several
+ * parameters affecting the receiver timings. These depend
+ * on the MIPI bus frequency F in Hz (sensor transmitter rate)
+ * as follows:
+ *	register value = (A/1e9 + B * UI) / COUNT_ACC
+ * where
+ *	UI = 1 / (2 * F) in seconds
+ *	COUNT_ACC = counter accuracy in seconds
+ *	COUNT_ACC = 0.125 ns = 1 / 8 ns, ACCINV = 8.
+ *
+ * A and B are coefficients from the table below,
+ * depending whether the register minimum or maximum value is
+ * calculated.
+ *				       Minimum     Maximum
+ * Clock lane			       A     B     A     B
+ * reg_rx_csi_dly_cnt_termen_clane     0     0    38     0
+ * reg_rx_csi_dly_cnt_settle_clane    95    -8   300   -16
+ * Data lanes
+ * reg_rx_csi_dly_cnt_termen_dlane0    0     0    35     4
+ * reg_rx_csi_dly_cnt_settle_dlane0   85    -2   145    -6
+ * reg_rx_csi_dly_cnt_termen_dlane1    0     0    35     4
+ * reg_rx_csi_dly_cnt_settle_dlane1   85    -2   145    -6
+ * reg_rx_csi_dly_cnt_termen_dlane2    0     0    35     4
+ * reg_rx_csi_dly_cnt_settle_dlane2   85    -2   145    -6
+ * reg_rx_csi_dly_cnt_termen_dlane3    0     0    35     4
+ * reg_rx_csi_dly_cnt_settle_dlane3   85    -2   145    -6
+ *
+ * We use the minimum values of both A and B.
+ */
+
+#define DIV_SHIFT	8
+#define CSI2_ACCINV	8
+
+static u32 calc_timing(s32 a, s32 b, s64 link_freq, s32 accinv)
+{
+	return accinv * a + (accinv * b * (500000000 >> DIV_SHIFT)
+			     / (s32)(link_freq >> DIV_SHIFT));
+}
+
+static int
+ipu6_isys_csi2_calc_timing(struct ipu6_isys_csi2 *csi2,
+			   struct ipu6_isys_csi2_timing *timing, s32 accinv)
+{
+	struct device *dev = &csi2->isys->adev->auxdev.dev;
+	s64 link_freq;
+
+	link_freq = ipu6_isys_csi2_get_link_freq(csi2);
+	if (link_freq < 0)
+		return link_freq;
+
+	timing->ctermen = calc_timing(CSI2_CSI_RX_DLY_CNT_TERMEN_CLANE_A,
+				      CSI2_CSI_RX_DLY_CNT_TERMEN_CLANE_B,
+				      link_freq, accinv);
+	timing->csettle = calc_timing(CSI2_CSI_RX_DLY_CNT_SETTLE_CLANE_A,
+				      CSI2_CSI_RX_DLY_CNT_SETTLE_CLANE_B,
+				      link_freq, accinv);
+	timing->dtermen = calc_timing(CSI2_CSI_RX_DLY_CNT_TERMEN_DLANE_A,
+				      CSI2_CSI_RX_DLY_CNT_TERMEN_DLANE_B,
+				      link_freq, accinv);
+	timing->dsettle = calc_timing(CSI2_CSI_RX_DLY_CNT_SETTLE_DLANE_A,
+				      CSI2_CSI_RX_DLY_CNT_SETTLE_DLANE_B,
+				      link_freq, accinv);
+
+	dev_dbg(dev, "ctermen %u csettle %u dtermen %u dsettle %u\n",
+		timing->ctermen, timing->csettle,
+		timing->dtermen, timing->dsettle);
+
+	return 0;
+}
+
+void ipu6_isys_register_errors(struct ipu6_isys_csi2 *csi2)
+{
+	u32 irq = readl(csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+			CSI_PORT_REG_BASE_IRQ_STATUS_OFFSET);
+	struct ipu6_isys *isys = csi2->isys;
+	u32 mask;
+
+	mask = isys->pdata->ipdata->csi2.irq_mask;
+	writel(irq & mask, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET);
+	csi2->receiver_errors |= irq & mask;
+}
+
+void ipu6_isys_csi2_error(struct ipu6_isys_csi2 *csi2)
+{
+	struct device *dev = &csi2->isys->adev->auxdev.dev;
+	const struct ipu6_csi2_error *errors;
+	u32 status;
+	u32 i;
+
+	/* register errors once more in case of interrupts are disabled */
+	ipu6_isys_register_errors(csi2);
+	status = csi2->receiver_errors;
+	csi2->receiver_errors = 0;
+	errors = dphy_rx_errors;
+
+	for (i = 0; i < CSI_RX_NUM_ERRORS_IN_IRQ; i++) {
+		if (status & BIT(i))
+			dev_err_ratelimited(dev, "csi2-%i error: %s\n",
+					    csi2->port, errors[i].error_string);
+	}
+}
+
+static int ipu6_isys_csi2_set_stream(struct v4l2_subdev *sd,
+				     const struct ipu6_isys_csi2_timing *timing,
+				     unsigned int nlanes, int enable)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	struct ipu6_isys_csi2 *csi2 = to_ipu6_isys_csi2(asd);
+	struct ipu6_isys *isys = csi2->isys;
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_isys_csi2_config cfg;
+	unsigned int nports;
+	int ret = 0;
+	u32 mask = 0;
+	u32 i;
+
+	dev_dbg(dev, "stream %s CSI2-%u with %u lanes\n", enable ? "on" : "off",
+		csi2->port, nlanes);
+
+	cfg.port = csi2->port;
+	cfg.nlanes = nlanes;
+
+	mask = isys->pdata->ipdata->csi2.irq_mask;
+	nports = isys->pdata->ipdata->csi2.nports;
+
+	if (!enable) {
+		writel(0, csi2->base + CSI_REG_CSI_FE_ENABLE);
+		writel(0, csi2->base + CSI_REG_PPI2CSI_ENABLE);
+
+		writel(0,
+		       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+		       CSI_PORT_REG_BASE_IRQ_ENABLE_OFFSET);
+		writel(mask,
+		       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+		       CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET);
+		writel(0,
+		       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+		       CSI_PORT_REG_BASE_IRQ_ENABLE_OFFSET);
+		writel(0xffffffff,
+		       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+		       CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET);
+
+		isys->phy_set_power(isys, &cfg, timing, false);
+
+		writel(0, isys->pdata->base + CSI_REG_HUB_FW_ACCESS_PORT
+		       (isys->pdata->ipdata->csi2.fw_access_port_ofs,
+			csi2->port));
+		writel(0, isys->pdata->base +
+		       CSI_REG_HUB_DRV_ACCESS_PORT(csi2->port));
+
+		return ret;
+	}
+
+	/* reset port reset */
+	writel(0x1, csi2->base + CSI_REG_PORT_GPREG_SRST);
+	usleep_range(100, 200);
+	writel(0x0, csi2->base + CSI_REG_PORT_GPREG_SRST);
+
+	/* enable port clock */
+	for (i = 0; i < nports; i++) {
+		writel(1, isys->pdata->base + CSI_REG_HUB_DRV_ACCESS_PORT(i));
+		writel(1, isys->pdata->base + CSI_REG_HUB_FW_ACCESS_PORT
+		       (isys->pdata->ipdata->csi2.fw_access_port_ofs, i));
+	}
+
+	/* enable all error related irq */
+	writel(mask,
+	       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_STATUS_OFFSET);
+	writel(mask,
+	       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_MASK_OFFSET);
+	writel(mask,
+	       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET);
+	writel(mask,
+	       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_LEVEL_NOT_PULSE_OFFSET);
+	writel(mask,
+	       csi2->base + CSI_PORT_REG_BASE_IRQ_CSI +
+	       CSI_PORT_REG_BASE_IRQ_ENABLE_OFFSET);
+
+	/*
+	 * Using event from firmware instead of irq to handle CSI2 sync event
+	 * which can reduce system wakeups. If CSI2 sync irq enabled, we need
+	 * disable the firmware CSI2 sync event to avoid duplicate handling.
+	 */
+	writel(0xffffffff, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+	       CSI_PORT_REG_BASE_IRQ_STATUS_OFFSET);
+	writel(0, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+	       CSI_PORT_REG_BASE_IRQ_MASK_OFFSET);
+	writel(0xffffffff, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+	       CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET);
+	writel(0, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+	       CSI_PORT_REG_BASE_IRQ_LEVEL_NOT_PULSE_OFFSET);
+	writel(0xffffffff, csi2->base + CSI_PORT_REG_BASE_IRQ_CSI_SYNC +
+	       CSI_PORT_REG_BASE_IRQ_ENABLE_OFFSET);
+
+	/* configure to enable FE and PPI2CSI */
+	writel(0, csi2->base + CSI_REG_CSI_FE_MODE);
+	writel(CSI_SENSOR_INPUT, csi2->base + CSI_REG_CSI_FE_MUX_CTRL);
+	writel(CSI_CNTR_SENSOR_LINE_ID | CSI_CNTR_SENSOR_FRAME_ID,
+	       csi2->base + CSI_REG_CSI_FE_SYNC_CNTR_SEL);
+	writel(FIELD_PREP(PPI_INTF_CONFIG_NOF_ENABLED_DLANES_MASK, nlanes - 1),
+	       csi2->base + CSI_REG_PPI2CSI_CONFIG_PPI_INTF);
+
+	writel(1, csi2->base + CSI_REG_PPI2CSI_ENABLE);
+	writel(1, csi2->base + CSI_REG_CSI_FE_ENABLE);
+
+	ret = isys->phy_set_power(isys, &cfg, timing, true);
+	if (ret)
+		dev_err(dev, "csi-%d phy power up failed %d\n", csi2->port,
+			ret);
+
+	return ret;
+}
+
+static int ipu6_isys_csi2_enable_streams(struct v4l2_subdev *sd,
+					 struct v4l2_subdev_state *state,
+					 u32 pad, u64 streams_mask)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	struct ipu6_isys_csi2 *csi2 = to_ipu6_isys_csi2(asd);
+	struct ipu6_isys_csi2_timing timing = { };
+	struct v4l2_subdev *remote_sd;
+	struct media_pad *remote_pad;
+	u64 sink_streams;
+	int ret;
+
+	remote_pad = media_pad_remote_pad_first(&sd->entity.pads[CSI2_PAD_SINK]);
+	remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+
+	sink_streams =
+		v4l2_subdev_state_xlate_streams(state, pad, CSI2_PAD_SINK,
+						&streams_mask);
+
+	ret = ipu6_isys_csi2_calc_timing(csi2, &timing, CSI2_ACCINV);
+	if (ret)
+		return ret;
+
+	ret = ipu6_isys_csi2_set_stream(sd, &timing, csi2->nlanes, true);
+	if (ret)
+		return ret;
+
+	ret = v4l2_subdev_enable_streams(remote_sd, remote_pad->index,
+					 sink_streams);
+	if (ret) {
+		ipu6_isys_csi2_set_stream(sd, NULL, 0, false);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ipu6_isys_csi2_disable_streams(struct v4l2_subdev *sd,
+					  struct v4l2_subdev_state *state,
+					  u32 pad, u64 streams_mask)
+{
+	struct v4l2_subdev *remote_sd;
+	struct media_pad *remote_pad;
+	u64 sink_streams;
+
+	sink_streams =
+		v4l2_subdev_state_xlate_streams(state, pad, CSI2_PAD_SINK,
+						&streams_mask);
+
+	remote_pad = media_pad_remote_pad_first(&sd->entity.pads[CSI2_PAD_SINK]);
+	remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+
+	ipu6_isys_csi2_set_stream(sd, NULL, 0, false);
+
+	v4l2_subdev_disable_streams(remote_sd, remote_pad->index, sink_streams);
+
+	return 0;
+}
+
+static int ipu6_isys_csi2_set_sel(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	struct device *dev = &asd->isys->adev->auxdev.dev;
+	struct v4l2_mbus_framefmt *sink_ffmt;
+	struct v4l2_mbus_framefmt *src_ffmt;
+	struct v4l2_rect *crop;
+
+	if (sel->pad == CSI2_PAD_SINK || sel->target != V4L2_SEL_TGT_CROP)
+		return -EINVAL;
+
+	sink_ffmt = v4l2_subdev_state_get_opposite_stream_format(state,
+								 sel->pad,
+								 sel->stream);
+	if (!sink_ffmt)
+		return -EINVAL;
+
+	src_ffmt = v4l2_subdev_state_get_format(state, sel->pad, sel->stream);
+	if (!src_ffmt)
+		return -EINVAL;
+
+	crop = v4l2_subdev_state_get_crop(state, sel->pad, sel->stream);
+	if (!crop)
+		return -EINVAL;
+
+	/* Only vertical cropping is supported */
+	sel->r.left = 0;
+	sel->r.width = sink_ffmt->width;
+	/* Non-bayer formats can't be single line cropped */
+	if (!ipu6_isys_is_bayer_format(sink_ffmt->code))
+		sel->r.top &= ~1;
+	sel->r.height = clamp(sel->r.height & ~1, IPU6_ISYS_MIN_HEIGHT,
+			      sink_ffmt->height - sel->r.top);
+	*crop = sel->r;
+
+	/* update source pad format */
+	src_ffmt->width = sel->r.width;
+	src_ffmt->height = sel->r.height;
+	if (ipu6_isys_is_bayer_format(sink_ffmt->code))
+		src_ffmt->code = ipu6_isys_convert_bayer_order(sink_ffmt->code,
+							       sel->r.left,
+							       sel->r.top);
+	dev_dbg(dev, "set crop for %s sel: %d,%d,%d,%d code: 0x%x\n",
+		sd->name, sel->r.left, sel->r.top, sel->r.width, sel->r.height,
+		src_ffmt->code);
+
+	return 0;
+}
+
+static int ipu6_isys_csi2_get_sel(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct v4l2_mbus_framefmt *sink_ffmt;
+	struct v4l2_rect *crop;
+	int ret = 0;
+
+	if (sd->entity.pads[sel->pad].flags & MEDIA_PAD_FL_SINK)
+		return -EINVAL;
+
+	sink_ffmt = v4l2_subdev_state_get_opposite_stream_format(state,
+								 sel->pad,
+								 sel->stream);
+	if (!sink_ffmt)
+		return -EINVAL;
+
+	crop = v4l2_subdev_state_get_crop(state, sel->pad, sel->stream);
+	if (!crop)
+		return -EINVAL;
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.left = 0;
+		sel->r.top = 0;
+		sel->r.width = sink_ffmt->width;
+		sel->r.height = sink_ffmt->height;
+		break;
+	case V4L2_SEL_TGT_CROP:
+		sel->r = *crop;
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct v4l2_subdev_pad_ops csi2_sd_pad_ops = {
+	.get_fmt = v4l2_subdev_get_fmt,
+	.set_fmt = ipu6_isys_subdev_set_fmt,
+	.get_selection = ipu6_isys_csi2_get_sel,
+	.set_selection = ipu6_isys_csi2_set_sel,
+	.enum_mbus_code = ipu6_isys_subdev_enum_mbus_code,
+	.set_routing = ipu6_isys_subdev_set_routing,
+	.enable_streams = ipu6_isys_csi2_enable_streams,
+	.disable_streams = ipu6_isys_csi2_disable_streams,
+};
+
+static const struct v4l2_subdev_ops csi2_sd_ops = {
+	.core = &csi2_sd_core_ops,
+	.pad = &csi2_sd_pad_ops,
+};
+
+static const struct media_entity_operations csi2_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+	.has_pad_interdep = v4l2_subdev_has_pad_interdep,
+};
+
+void ipu6_isys_csi2_cleanup(struct ipu6_isys_csi2 *csi2)
+{
+	if (!csi2->isys)
+		return;
+
+	v4l2_device_unregister_subdev(&csi2->asd.sd);
+	v4l2_subdev_cleanup(&csi2->asd.sd);
+	ipu6_isys_subdev_cleanup(&csi2->asd);
+	csi2->isys = NULL;
+}
+
+int ipu6_isys_csi2_init(struct ipu6_isys_csi2 *csi2,
+			struct ipu6_isys *isys,
+			void __iomem *base, unsigned int index)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	int ret;
+
+	csi2->isys = isys;
+	csi2->base = base;
+	csi2->port = index;
+
+	csi2->asd.sd.entity.ops = &csi2_entity_ops;
+	csi2->asd.isys = isys;
+	ret = ipu6_isys_subdev_init(&csi2->asd, &csi2_sd_ops, 0,
+				    NR_OF_CSI2_SINK_PADS, NR_OF_CSI2_SRC_PADS);
+	if (ret)
+		goto fail;
+
+	csi2->asd.source = IPU6_FW_ISYS_STREAM_SRC_CSI2_PORT0 + index;
+	csi2->asd.supported_codes = csi2_supported_codes;
+	snprintf(csi2->asd.sd.name, sizeof(csi2->asd.sd.name),
+		 IPU6_ISYS_ENTITY_PREFIX " CSI2 %u", index);
+	v4l2_set_subdevdata(&csi2->asd.sd, &csi2->asd);
+	ret = v4l2_subdev_init_finalize(&csi2->asd.sd);
+	if (ret) {
+		dev_err(dev, "failed to init v4l2 subdev\n");
+		goto fail;
+	}
+
+	ret = v4l2_device_register_subdev(&isys->v4l2_dev, &csi2->asd.sd);
+	if (ret) {
+		dev_err(dev, "failed to register v4l2 subdev\n");
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	ipu6_isys_csi2_cleanup(csi2);
+
+	return ret;
+}
+
+void ipu6_isys_csi2_sof_event_by_stream(struct ipu6_isys_stream *stream)
+{
+	struct video_device *vdev = stream->asd->sd.devnode;
+	struct device *dev = &stream->isys->adev->auxdev.dev;
+	struct ipu6_isys_csi2 *csi2 = ipu6_isys_subdev_to_csi2(stream->asd);
+	struct v4l2_event ev = {
+		.type = V4L2_EVENT_FRAME_SYNC,
+	};
+
+	ev.u.frame_sync.frame_sequence = atomic_fetch_inc(&stream->sequence);
+	v4l2_event_queue(vdev, &ev);
+
+	dev_dbg(dev, "sof_event::csi2-%i sequence: %i, vc: %d\n",
+		csi2->port, ev.u.frame_sync.frame_sequence, stream->vc);
+}
+
+void ipu6_isys_csi2_eof_event_by_stream(struct ipu6_isys_stream *stream)
+{
+	struct device *dev = &stream->isys->adev->auxdev.dev;
+	struct ipu6_isys_csi2 *csi2 = ipu6_isys_subdev_to_csi2(stream->asd);
+	u32 frame_sequence = atomic_read(&stream->sequence);
+
+	dev_dbg(dev, "eof_event::csi2-%i sequence: %i\n",
+		csi2->port, frame_sequence);
+}
+
+int ipu6_isys_csi2_get_remote_desc(u32 source_stream,
+				   struct ipu6_isys_csi2 *csi2,
+				   struct media_entity *source_entity,
+				   struct v4l2_mbus_frame_desc_entry *entry)
+{
+	struct v4l2_mbus_frame_desc_entry *desc_entry = NULL;
+	struct device *dev = &csi2->isys->adev->auxdev.dev;
+	struct v4l2_mbus_frame_desc desc;
+	struct v4l2_subdev *source;
+	struct media_pad *pad;
+	unsigned int i;
+	int ret;
+
+	source = media_entity_to_v4l2_subdev(source_entity);
+	if (!source)
+		return -EPIPE;
+
+	pad = media_pad_remote_pad_first(&csi2->asd.pad[CSI2_PAD_SINK]);
+	if (!pad)
+		return -EPIPE;
+
+	ret = v4l2_subdev_call(source, pad, get_frame_desc, pad->index, &desc);
+	if (ret)
+		return ret;
+
+	if (desc.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
+		dev_err(dev, "Unsupported frame descriptor type\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < desc.num_entries; i++) {
+		if (source_stream == desc.entry[i].stream) {
+			desc_entry = &desc.entry[i];
+			break;
+		}
+	}
+
+	if (!desc_entry) {
+		dev_err(dev, "Failed to find stream %u from remote subdev\n",
+			source_stream);
+		return -EINVAL;
+	}
+
+	if (desc_entry->bus.csi2.vc >= NR_OF_CSI2_VC) {
+		dev_err(dev, "invalid vc %d\n", desc_entry->bus.csi2.vc);
+		return -EINVAL;
+	}
+
+	*entry = *desc_entry;
+
+	return 0;
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-csi2.h

@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_ISYS_CSI2_H
+#define IPU6_ISYS_CSI2_H
+
+#include <linux/container_of.h>
+
+#include "ipu6-isys-subdev.h"
+#include "ipu6-isys-video.h"
+
+struct media_entity;
+struct v4l2_mbus_frame_desc_entry;
+
+struct ipu6_isys_video;
+struct ipu6_isys;
+struct ipu6_isys_stream;
+
+#define NR_OF_CSI2_VC		16
+#define INVALID_VC_ID		-1
+#define NR_OF_CSI2_SINK_PADS	1
+#define CSI2_PAD_SINK		0
+#define NR_OF_CSI2_SRC_PADS	8
+#define CSI2_PAD_SRC		1
+#define NR_OF_CSI2_PADS		(NR_OF_CSI2_SINK_PADS + NR_OF_CSI2_SRC_PADS)
+
+#define CSI2_CSI_RX_DLY_CNT_TERMEN_CLANE_A		0
+#define CSI2_CSI_RX_DLY_CNT_TERMEN_CLANE_B		0
+#define CSI2_CSI_RX_DLY_CNT_SETTLE_CLANE_A		95
+#define CSI2_CSI_RX_DLY_CNT_SETTLE_CLANE_B		-8
+
+#define CSI2_CSI_RX_DLY_CNT_TERMEN_DLANE_A		0
+#define CSI2_CSI_RX_DLY_CNT_TERMEN_DLANE_B		0
+#define CSI2_CSI_RX_DLY_CNT_SETTLE_DLANE_A		85
+#define CSI2_CSI_RX_DLY_CNT_SETTLE_DLANE_B		-2
+
+struct ipu6_isys_csi2 {
+	struct ipu6_isys_subdev asd;
+	struct ipu6_isys *isys;
+	struct ipu6_isys_video av[NR_OF_CSI2_SRC_PADS];
+
+	void __iomem *base;
+	u32 receiver_errors;
+	unsigned int nlanes;
+	unsigned int port;
+};
+
+struct ipu6_isys_csi2_timing {
+	u32 ctermen;
+	u32 csettle;
+	u32 dtermen;
+	u32 dsettle;
+};
+
+struct ipu6_csi2_error {
+	const char *error_string;
+	bool is_info_only;
+};
+
+#define ipu6_isys_subdev_to_csi2(__sd) \
+	container_of(__sd, struct ipu6_isys_csi2, asd)
+
+#define to_ipu6_isys_csi2(__asd) container_of(__asd, struct ipu6_isys_csi2, asd)
+
+s64 ipu6_isys_csi2_get_link_freq(struct ipu6_isys_csi2 *csi2);
+int ipu6_isys_csi2_init(struct ipu6_isys_csi2 *csi2, struct ipu6_isys *isys,
+			void __iomem *base, unsigned int index);
+void ipu6_isys_csi2_cleanup(struct ipu6_isys_csi2 *csi2);
+void ipu6_isys_csi2_sof_event_by_stream(struct ipu6_isys_stream *stream);
+void ipu6_isys_csi2_eof_event_by_stream(struct ipu6_isys_stream *stream);
+void ipu6_isys_register_errors(struct ipu6_isys_csi2 *csi2);
+void ipu6_isys_csi2_error(struct ipu6_isys_csi2 *csi2);
+int ipu6_isys_csi2_get_remote_desc(u32 source_stream,
+				   struct ipu6_isys_csi2 *csi2,
+				   struct media_entity *source_entity,
+				   struct v4l2_mbus_frame_desc_entry *entry);
+
+#endif /* IPU6_ISYS_CSI2_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c

@@ -0,0 +1,548 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-isys.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+
+#define IPU6_DWC_DPHY_BASE(i)			(0x238038 + 0x34 * (i))
+#define IPU6_DWC_DPHY_RSTZ			0x00
+#define IPU6_DWC_DPHY_SHUTDOWNZ			0x04
+#define IPU6_DWC_DPHY_HSFREQRANGE		0x08
+#define IPU6_DWC_DPHY_CFGCLKFREQRANGE		0x0c
+#define IPU6_DWC_DPHY_TEST_IFC_ACCESS_MODE	0x10
+#define IPU6_DWC_DPHY_TEST_IFC_REQ		0x14
+#define IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION	0x18
+#define IPU6_DWC_DPHY_DFT_CTRL0			0x28
+#define IPU6_DWC_DPHY_DFT_CTRL1			0x2c
+#define IPU6_DWC_DPHY_DFT_CTRL2			0x30
+
+/*
+ * test IFC request definition:
+ * - req: 0 for read, 1 for write
+ * - 12 bits address
+ * - 8bits data (will ignore for read)
+ * --24----16------4-----0
+ * --|-data-|-addr-|-req-|
+ */
+#define IFC_REQ(req, addr, data) (FIELD_PREP(GENMASK(23, 16), data) | \
+				  FIELD_PREP(GENMASK(15, 4), addr) | \
+				  FIELD_PREP(GENMASK(1, 0), req))
+
+#define TEST_IFC_REQ_READ	0
+#define TEST_IFC_REQ_WRITE	1
+#define TEST_IFC_REQ_RESET	2
+
+#define TEST_IFC_ACCESS_MODE_FSM	0
+#define TEST_IFC_ACCESS_MODE_IFC_CTL	1
+
+enum phy_fsm_state {
+	PHY_FSM_STATE_POWERON = 0,
+	PHY_FSM_STATE_BGPON = 1,
+	PHY_FSM_STATE_CAL_TYPE = 2,
+	PHY_FSM_STATE_BURNIN_CAL = 3,
+	PHY_FSM_STATE_TERMCAL = 4,
+	PHY_FSM_STATE_OFFSETCAL = 5,
+	PHY_FSM_STATE_OFFSET_LANE = 6,
+	PHY_FSM_STATE_IDLE = 7,
+	PHY_FSM_STATE_ULP = 8,
+	PHY_FSM_STATE_DDLTUNNING = 9,
+	PHY_FSM_STATE_SKEW_BACKWARD = 10,
+	PHY_FSM_STATE_INVALID,
+};
+
+static void dwc_dphy_write(struct ipu6_isys *isys, u32 phy_id, u32 addr,
+			   u32 data)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id);
+
+	dev_dbg(dev, "write: reg 0x%zx = data 0x%x", base + addr - isys_base,
+		data);
+	writel(data, base + addr);
+}
+
+static u32 dwc_dphy_read(struct ipu6_isys *isys, u32 phy_id, u32 addr)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id);
+	u32 data;
+
+	data = readl(base + addr);
+	dev_dbg(dev, "read: reg 0x%zx = data 0x%x", base + addr - isys_base,
+		data);
+
+	return data;
+}
+
+static void dwc_dphy_write_mask(struct ipu6_isys *isys, u32 phy_id, u32 addr,
+				u32 data, u8 shift, u8 width)
+{
+	u32 temp;
+	u32 mask;
+
+	mask = (1 << width) - 1;
+	temp = dwc_dphy_read(isys, phy_id, addr);
+	temp &= ~(mask << shift);
+	temp |= (data & mask) << shift;
+	dwc_dphy_write(isys, phy_id, addr, temp);
+}
+
+static u32 __maybe_unused dwc_dphy_read_mask(struct ipu6_isys *isys, u32 phy_id,
+					     u32 addr, u8 shift,  u8 width)
+{
+	u32 val;
+
+	val = dwc_dphy_read(isys, phy_id, addr) >> shift;
+	return val & ((1 << width) - 1);
+}
+
+#define DWC_DPHY_TIMEOUT (5 * USEC_PER_SEC)
+static int dwc_dphy_ifc_read(struct ipu6_isys *isys, u32 phy_id, u32 addr,
+			     u32 *val)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id);
+	void __iomem *reg;
+	u32 completion;
+	int ret;
+
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ,
+		       IFC_REQ(TEST_IFC_REQ_READ, addr, 0));
+	reg = base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION;
+	ret = readl_poll_timeout(reg, completion, !(completion & BIT(0)),
+				 10, DWC_DPHY_TIMEOUT);
+	if (ret) {
+		dev_err(dev, "DWC ifc request read timeout\n");
+		return ret;
+	}
+
+	*val = completion >> 8 & 0xff;
+	*val = FIELD_GET(GENMASK(15, 8), completion);
+	dev_dbg(dev, "DWC ifc read 0x%x = 0x%x", addr, *val);
+
+	return 0;
+}
+
+static int dwc_dphy_ifc_write(struct ipu6_isys *isys, u32 phy_id, u32 addr,
+			      u32 data)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id);
+	void __iomem *reg;
+	u32 completion;
+	int ret;
+
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ,
+		       IFC_REQ(TEST_IFC_REQ_WRITE, addr, data));
+	completion = readl(base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION);
+	reg = base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION;
+	ret = readl_poll_timeout(reg, completion, !(completion & BIT(0)),
+				 10, DWC_DPHY_TIMEOUT);
+	if (ret)
+		dev_err(dev, "DWC ifc request write timeout\n");
+
+	return ret;
+}
+
+static void dwc_dphy_ifc_write_mask(struct ipu6_isys *isys, u32 phy_id,
+				    u32 addr, u32 data, u8 shift, u8 width)
+{
+	u32 temp, mask;
+	int ret;
+
+	ret = dwc_dphy_ifc_read(isys, phy_id, addr, &temp);
+	if (ret)
+		return;
+
+	mask = (1 << width) - 1;
+	temp &= ~(mask << shift);
+	temp |= (data & mask) << shift;
+	dwc_dphy_ifc_write(isys, phy_id, addr, temp);
+}
+
+static u32 dwc_dphy_ifc_read_mask(struct ipu6_isys *isys, u32 phy_id, u32 addr,
+				  u8 shift, u8 width)
+{
+	int ret;
+	u32 val;
+
+	ret = dwc_dphy_ifc_read(isys, phy_id, addr, &val);
+	if (ret)
+		return 0;
+
+	return ((val >> shift) & ((1 << width) - 1));
+}
+
+static int dwc_dphy_pwr_up(struct ipu6_isys *isys, u32 phy_id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	u32 fsm_state;
+	int ret;
+
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_RSTZ, 1);
+	usleep_range(10, 20);
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_SHUTDOWNZ, 1);
+
+	ret = read_poll_timeout(dwc_dphy_ifc_read_mask, fsm_state,
+				(fsm_state == PHY_FSM_STATE_IDLE ||
+				 fsm_state == PHY_FSM_STATE_ULP),
+				100, DWC_DPHY_TIMEOUT, false, isys,
+				phy_id, 0x1e, 0, 4);
+
+	if (ret)
+		dev_err(dev, "Dphy %d power up failed, state 0x%x", phy_id,
+			fsm_state);
+
+	return ret;
+}
+
+struct dwc_dphy_freq_range {
+	u8 hsfreq;
+	u16 min;
+	u16 max;
+	u16 default_mbps;
+	u16 osc_freq_target;
+};
+
+#define DPHY_FREQ_RANGE_NUM		(63)
+#define DPHY_FREQ_RANGE_INVALID_INDEX	(0xff)
+static const struct dwc_dphy_freq_range freqranges[DPHY_FREQ_RANGE_NUM] = {
+	{0x00,	80,	97,	80,	335},
+	{0x10,	80,	107,	90,	335},
+	{0x20,	84,	118,	100,	335},
+	{0x30,	93,	128,	110,	335},
+	{0x01,	103,	139,	120,	335},
+	{0x11,	112,	149,	130,	335},
+	{0x21,	122,	160,	140,	335},
+	{0x31,	131,	170,	150,	335},
+	{0x02,	141,	181,	160,	335},
+	{0x12,	150,	191,	170,	335},
+	{0x22,	160,	202,	180,	335},
+	{0x32,	169,	212,	190,	335},
+	{0x03,	183,	228,	205,	335},
+	{0x13,	198,	244,	220,	335},
+	{0x23,	212,	259,	235,	335},
+	{0x33,	226,	275,	250,	335},
+	{0x04,	250,	301,	275,	335},
+	{0x14,	274,	328,	300,	335},
+	{0x25,	297,	354,	325,	335},
+	{0x35,	321,	380,	350,	335},
+	{0x05,	369,	433,	400,	335},
+	{0x16,	416,	485,	450,	335},
+	{0x26,	464,	538,	500,	335},
+	{0x37,	511,	590,	550,	335},
+	{0x07,	559,	643,	600,	335},
+	{0x18,	606,	695,	650,	335},
+	{0x28,	654,	748,	700,	335},
+	{0x39,	701,	800,	750,	335},
+	{0x09,	749,	853,	800,	335},
+	{0x19,	796,	905,	850,	335},
+	{0x29,	844,	958,	900,	335},
+	{0x3a,	891,	1010,	950,	335},
+	{0x0a,	939,	1063,	1000,	335},
+	{0x1a,	986,	1115,	1050,	335},
+	{0x2a,	1034,	1168,	1100,	335},
+	{0x3b,	1081,	1220,	1150,	335},
+	{0x0b,	1129,	1273,	1200,	335},
+	{0x1b,	1176,	1325,	1250,	335},
+	{0x2b,	1224,	1378,	1300,	335},
+	{0x3c,	1271,	1430,	1350,	335},
+	{0x0c,	1319,	1483,	1400,	335},
+	{0x1c,	1366,	1535,	1450,	335},
+	{0x2c,	1414,	1588,	1500,	335},
+	{0x3d,	1461,	1640,	1550,	208},
+	{0x0d,	1509,	1693,	1600,	214},
+	{0x1d,	1556,	1745,	1650,	221},
+	{0x2e,	1604,	1798,	1700,	228},
+	{0x3e,	1651,	1850,	1750,	234},
+	{0x0e,	1699,	1903,	1800,	241},
+	{0x1e,	1746,	1955,	1850,	248},
+	{0x2f,	1794,	2008,	1900,	255},
+	{0x3f,	1841,	2060,	1950,	261},
+	{0x0f,	1889,	2113,	2000,	268},
+	{0x40,	1936,	2165,	2050,	275},
+	{0x41,	1984,	2218,	2100,	281},
+	{0x42,	2031,	2270,	2150,	288},
+	{0x43,	2079,	2323,	2200,	294},
+	{0x44,	2126,	2375,	2250,	302},
+	{0x45,	2174,	2428,	2300,	308},
+	{0x46,	2221,	2480,	2350,	315},
+	{0x47,	2269,	2500,	2400,	321},
+	{0x48,	2316,	2500,	2450,	328},
+	{0x49,	2364,	2500,	2500,	335}
+};
+
+static u16 get_hsfreq_by_mbps(u32 mbps)
+{
+	u16 best = DPHY_FREQ_RANGE_INVALID_INDEX;
+	unsigned int i;
+
+	for (i = 0; i < DPHY_FREQ_RANGE_NUM; i++) {
+		if (mbps > freqranges[i].max)
+			continue;
+
+		if (mbps < freqranges[i].min)
+			break;
+
+		if (best == DPHY_FREQ_RANGE_INVALID_INDEX ||
+		    freqranges[i].osc_freq_target >
+		    freqranges[best].osc_freq_target ||
+		    (freqranges[i].osc_freq_target ==
+		     freqranges[best].osc_freq_target &&
+		     abs((int)mbps - (int)freqranges[i].default_mbps) <
+		     abs((int)mbps - (int)freqranges[best].default_mbps)))
+			best = i;
+	}
+
+	return best;
+}
+
+static int ipu6_isys_dwc_phy_config(struct ipu6_isys *isys,
+				    u32 phy_id, u32 mbps)
+{
+	struct ipu6_bus_device *adev = isys->adev;
+	struct device *dev = &adev->auxdev.dev;
+	struct ipu6_device *isp = adev->isp;
+	u32 cfg_clk_freqrange;
+	u32 osc_freq_target;
+	u32 index;
+
+	dev_dbg(dev, "config Dphy %u with %u mbps", phy_id, mbps);
+
+	index = get_hsfreq_by_mbps(mbps);
+	if (index == DPHY_FREQ_RANGE_INVALID_INDEX) {
+		dev_err(dev, "link freq not found for mbps %u", mbps);
+		return -EINVAL;
+	}
+
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_HSFREQRANGE,
+			    freqranges[index].hsfreq, 0, 7);
+
+	/* Force termination Calibration */
+	if (isys->phy_termcal_val) {
+		dwc_dphy_ifc_write_mask(isys, phy_id, 0x20a, 0x1, 0, 1);
+		dwc_dphy_ifc_write_mask(isys, phy_id, 0x209, 0x3, 0, 2);
+		dwc_dphy_ifc_write_mask(isys, phy_id, 0x209,
+					isys->phy_termcal_val, 4, 4);
+	}
+
+	/*
+	 * Enable override to configure the DDL target oscillation
+	 * frequency on bit 0 of register 0xe4
+	 */
+	dwc_dphy_ifc_write_mask(isys, phy_id, 0xe4, 0x1, 0, 1);
+	/*
+	 * configure registers 0xe2, 0xe3 with the
+	 * appropriate DDL target oscillation frequency
+	 * 0x1cc(460)
+	 */
+	osc_freq_target = freqranges[index].osc_freq_target;
+	dwc_dphy_ifc_write_mask(isys, phy_id, 0xe2,
+				osc_freq_target & 0xff, 0, 8);
+	dwc_dphy_ifc_write_mask(isys, phy_id, 0xe3,
+				(osc_freq_target >> 8) & 0xf, 0, 4);
+
+	if (mbps < 1500) {
+		/* deskew_polarity_rw, for < 1.5Gbps */
+		dwc_dphy_ifc_write_mask(isys, phy_id, 0x8, 0x1, 5, 1);
+	}
+
+	/*
+	 * Set cfgclkfreqrange[5:0] = round[(Fcfg_clk(MHz)-17)*4]
+	 * (38.4 - 17) * 4 = ~85 (0x55)
+	 */
+	cfg_clk_freqrange = (isp->buttress.ref_clk - 170) * 4 / 10;
+	dev_dbg(dev, "ref_clk = %u clk_freqrange = %u",
+		isp->buttress.ref_clk, cfg_clk_freqrange);
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_CFGCLKFREQRANGE,
+			    cfg_clk_freqrange, 0, 8);
+
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0x1, 4, 1);
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0x1, 8, 1);
+
+	return 0;
+}
+
+static void ipu6_isys_dwc_phy_aggr_setup(struct ipu6_isys *isys, u32 master,
+					 u32 slave, u32 mbps)
+{
+	/* Config mastermacro */
+	dwc_dphy_ifc_write_mask(isys, master, 0x133, 0x1, 0, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x133, 0x0, 0, 1);
+
+	/* Config master PHY clk lane to drive long channel clk */
+	dwc_dphy_ifc_write_mask(isys, master, 0x307, 0x1, 2, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x307, 0x0, 2, 1);
+
+	/* Config both PHYs data lanes to get clk from long channel */
+	dwc_dphy_ifc_write_mask(isys, master, 0x508, 0x1, 5, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x508, 0x1, 5, 1);
+	dwc_dphy_ifc_write_mask(isys, master, 0x708, 0x1, 5, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x708, 0x1, 5, 1);
+
+	/* Config slave PHY clk lane to bypass long channel clk to DDR clk */
+	dwc_dphy_ifc_write_mask(isys, master, 0x308, 0x0, 3, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x308, 0x1, 3, 1);
+
+	/* Override slave PHY clk lane enable (DPHYRXCLK_CLL_demux module) */
+	dwc_dphy_ifc_write_mask(isys, slave, 0xe0, 0x3, 0, 2);
+
+	/* Override slave PHY DDR clk lane enable (DPHYHSRX_div124 module) */
+	dwc_dphy_ifc_write_mask(isys, slave, 0xe1, 0x1, 1, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x307, 0x1, 3, 1);
+
+	/* Turn off slave PHY LP-RX clk lane */
+	dwc_dphy_ifc_write_mask(isys, slave, 0x304, 0x1, 7, 1);
+	dwc_dphy_ifc_write_mask(isys, slave, 0x305, 0xa, 0, 5);
+}
+
+#define PHY_E	4
+static int ipu6_isys_dwc_phy_powerup_ack(struct ipu6_isys *isys, u32 phy_id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	u32 rescal_done;
+	int ret;
+
+	ret = dwc_dphy_pwr_up(isys, phy_id);
+	if (ret != 0) {
+		dev_err(dev, "Dphy %u power up failed(%d)", phy_id, ret);
+		return ret;
+	}
+
+	/* reset forcerxmode */
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0, 4, 1);
+	dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0, 8, 1);
+
+	dev_dbg(dev, "Dphy %u is ready!", phy_id);
+
+	if (phy_id != PHY_E || isys->phy_termcal_val)
+		return 0;
+
+	usleep_range(100, 200);
+	rescal_done = dwc_dphy_ifc_read_mask(isys, phy_id, 0x221, 7, 1);
+	if (rescal_done) {
+		isys->phy_termcal_val = dwc_dphy_ifc_read_mask(isys, phy_id,
+							       0x220, 2, 4);
+		dev_dbg(dev, "termcal done with value = %u",
+			isys->phy_termcal_val);
+	}
+
+	return 0;
+}
+
+static void ipu6_isys_dwc_phy_reset(struct ipu6_isys *isys, u32 phy_id)
+{
+	dev_dbg(&isys->adev->auxdev.dev, "Reset phy %u", phy_id);
+
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_SHUTDOWNZ, 0);
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_RSTZ, 0);
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_ACCESS_MODE,
+		       TEST_IFC_ACCESS_MODE_FSM);
+	dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ,
+		       TEST_IFC_REQ_RESET);
+}
+
+int ipu6_isys_dwc_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	u32 phy_id, primary, secondary;
+	u32 nlanes, port, mbps;
+	s64 link_freq;
+	int ret;
+
+	port = cfg->port;
+
+	if (!isys_base || port >= isys->pdata->ipdata->csi2.nports) {
+		dev_warn(dev, "invalid port ID %d\n", port);
+		return -EINVAL;
+	}
+
+	nlanes = cfg->nlanes;
+	/* only port 0, 2 and 4 support 4 lanes */
+	if (nlanes == 4 && port % 2) {
+		dev_err(dev, "invalid csi-port %u with %u lanes\n", port,
+			nlanes);
+		return -EINVAL;
+	}
+
+	link_freq = ipu6_isys_csi2_get_link_freq(&isys->csi2[port]);
+	if (link_freq < 0) {
+		dev_err(dev, "get link freq failed(%lld).\n", link_freq);
+		return link_freq;
+	}
+
+	mbps = div_u64(link_freq, 500000);
+
+	phy_id = port;
+	primary = port & ~1;
+	secondary = primary + 1;
+	if (on) {
+		if (nlanes == 4) {
+			dev_dbg(dev, "config phy %u and %u in aggr mode\n",
+				primary, secondary);
+
+			ipu6_isys_dwc_phy_reset(isys, primary);
+			ipu6_isys_dwc_phy_reset(isys, secondary);
+			ipu6_isys_dwc_phy_aggr_setup(isys, primary,
+						     secondary, mbps);
+
+			ret = ipu6_isys_dwc_phy_config(isys, primary, mbps);
+			if (ret)
+				return ret;
+			ret = ipu6_isys_dwc_phy_config(isys, secondary, mbps);
+			if (ret)
+				return ret;
+
+			ret = ipu6_isys_dwc_phy_powerup_ack(isys, primary);
+			if (ret)
+				return ret;
+
+			ret = ipu6_isys_dwc_phy_powerup_ack(isys, secondary);
+			return ret;
+		}
+
+		dev_dbg(dev, "config phy %u with %u lanes in non-aggr mode\n",
+			phy_id, nlanes);
+
+		ipu6_isys_dwc_phy_reset(isys, phy_id);
+		ret = ipu6_isys_dwc_phy_config(isys, phy_id, mbps);
+		if (ret)
+			return ret;
+
+		ret = ipu6_isys_dwc_phy_powerup_ack(isys, phy_id);
+		return ret;
+	}
+
+	if (nlanes == 4) {
+		dev_dbg(dev, "Power down phy %u and phy %u for port %u\n",
+			primary, secondary, port);
+		ipu6_isys_dwc_phy_reset(isys, secondary);
+		ipu6_isys_dwc_phy_reset(isys, primary);
+
+		return 0;
+	}
+
+	dev_dbg(dev, "Powerdown phy %u with %u lanes\n", phy_id, nlanes);
+
+	ipu6_isys_dwc_phy_reset(isys, phy_id);
+
+	return 0;
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-jsl-phy.c

@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/device.h>
+#include <linux/io.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-isys.h"
+#include "ipu6-isys-csi2.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+
+/* only use BB0, BB2, BB4, and BB6 on PHY0 */
+#define IPU6SE_ISYS_PHY_BB_NUM		4
+#define IPU6SE_ISYS_PHY_0_BASE		0x10000
+
+#define PHY_CPHY_DLL_OVRD(x)		(0x100 + 0x100 * (x))
+#define PHY_CPHY_RX_CONTROL1(x)		(0x110 + 0x100 * (x))
+#define PHY_DPHY_CFG(x)			(0x148 + 0x100 * (x))
+#define PHY_BB_AFE_CONFIG(x)		(0x174 + 0x100 * (x))
+
+/*
+ * use port_cfg to configure that which data lanes used
+ * +---------+     +------+ +-----+
+ * | port0 x4<-----|      | |     |
+ * |         |     | port | |     |
+ * | port1 x2<-----|      | |     |
+ * |         |     |      <-| PHY |
+ * | port2 x4<-----|      | |     |
+ * |         |     |config| |     |
+ * | port3 x2<-----|      | |     |
+ * +---------+     +------+ +-----+
+ */
+static const unsigned int csi2_port_cfg[][3] = {
+	{0, 0, 0x1f}, /* no link */
+	{4, 0, 0x10}, /* x4 + x4 config */
+	{2, 0, 0x12}, /* x2 + x2 config */
+	{1, 0, 0x13}, /* x1 + x1 config */
+	{2, 1, 0x15}, /* x2x1 + x2x1 config */
+	{1, 1, 0x16}, /* x1x1 + x1x1 config */
+	{2, 2, 0x18}, /* x2x2 + x2x2 config */
+	{1, 2, 0x19} /* x1x2 + x1x2 config */
+};
+
+/* port, nlanes, bbindex, portcfg */
+static const unsigned int phy_port_cfg[][4] = {
+	/* sip0 */
+	{0, 1, 0, 0x15},
+	{0, 2, 0, 0x15},
+	{0, 4, 0, 0x15},
+	{0, 4, 2, 0x22},
+	/* sip1 */
+	{2, 1, 4, 0x15},
+	{2, 2, 4, 0x15},
+	{2, 4, 4, 0x15},
+	{2, 4, 6, 0x22}
+};
+
+static void ipu6_isys_csi2_phy_config_by_port(struct ipu6_isys *isys,
+					      unsigned int port,
+					      unsigned int nlanes)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *base = isys->adev->isp->base;
+	unsigned int bbnum;
+	u32 val, reg, i;
+
+	dev_dbg(dev, "port %u with %u lanes", port, nlanes);
+
+	/* only support <1.5Gbps */
+	for (i = 0; i < IPU6SE_ISYS_PHY_BB_NUM; i++) {
+		/* cphy_dll_ovrd.crcdc_fsm_dlane0 = 13 */
+		reg = IPU6SE_ISYS_PHY_0_BASE + PHY_CPHY_DLL_OVRD(i);
+		val = readl(base + reg);
+		val |= FIELD_PREP(GENMASK(6, 1), 13);
+		writel(val, base + reg);
+
+		/* cphy_rx_control1.en_crc1 = 1 */
+		reg = IPU6SE_ISYS_PHY_0_BASE + PHY_CPHY_RX_CONTROL1(i);
+		val = readl(base + reg);
+		val |= BIT(31);
+		writel(val, base + reg);
+
+		/* dphy_cfg.reserved = 1, .lden_from_dll_ovrd_0 = 1 */
+		reg = IPU6SE_ISYS_PHY_0_BASE + PHY_DPHY_CFG(i);
+		val = readl(base + reg);
+		val |= BIT(25) | BIT(26);
+		writel(val, base + reg);
+
+		/* cphy_dll_ovrd.lden_crcdc_fsm_dlane0 = 1 */
+		reg = IPU6SE_ISYS_PHY_0_BASE + PHY_CPHY_DLL_OVRD(i);
+		val = readl(base + reg);
+		val |= BIT(0);
+		writel(val, base + reg);
+	}
+
+	/* Front end config, use minimal channel loss */
+	for (i = 0; i < ARRAY_SIZE(phy_port_cfg); i++) {
+		if (phy_port_cfg[i][0] == port &&
+		    phy_port_cfg[i][1] == nlanes) {
+			bbnum = phy_port_cfg[i][2] / 2;
+			reg = IPU6SE_ISYS_PHY_0_BASE + PHY_BB_AFE_CONFIG(bbnum);
+			val = readl(base + reg);
+			val |= phy_port_cfg[i][3];
+			writel(val, base + reg);
+		}
+	}
+}
+
+static void ipu6_isys_csi2_rx_control(struct ipu6_isys *isys)
+{
+	void __iomem *base = isys->adev->isp->base;
+	u32 val, reg;
+
+	reg = CSI2_HUB_GPREG_SIP0_CSI_RX_A_CONTROL;
+	val = readl(base + reg);
+	val |= BIT(0);
+	writel(val, base + CSI2_HUB_GPREG_SIP0_CSI_RX_A_CONTROL);
+
+	reg = CSI2_HUB_GPREG_SIP0_CSI_RX_B_CONTROL;
+	val = readl(base + reg);
+	val |= BIT(0);
+	writel(val, base + CSI2_HUB_GPREG_SIP0_CSI_RX_B_CONTROL);
+
+	reg = CSI2_HUB_GPREG_SIP1_CSI_RX_A_CONTROL;
+	val = readl(base + reg);
+	val |= BIT(0);
+	writel(val, base + CSI2_HUB_GPREG_SIP1_CSI_RX_A_CONTROL);
+
+	reg = CSI2_HUB_GPREG_SIP1_CSI_RX_B_CONTROL;
+	val = readl(base + reg);
+	val |= BIT(0);
+	writel(val, base + CSI2_HUB_GPREG_SIP1_CSI_RX_B_CONTROL);
+}
+
+static int ipu6_isys_csi2_set_port_cfg(struct ipu6_isys *isys,
+				       unsigned int port, unsigned int nlanes)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	unsigned int sip = port / 2;
+	unsigned int index;
+
+	switch (nlanes) {
+	case 1:
+		index = 5;
+		break;
+	case 2:
+		index = 6;
+		break;
+	case 4:
+		index = 1;
+		break;
+	default:
+		dev_err(dev, "lanes nr %u is unsupported\n", nlanes);
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "port config for port %u with %u lanes\n",	port, nlanes);
+
+	writel(csi2_port_cfg[index][2],
+	       isys->pdata->base + CSI2_HUB_GPREG_SIP_FB_PORT_CFG(sip));
+
+	return 0;
+}
+
+static void
+ipu6_isys_csi2_set_timing(struct ipu6_isys *isys,
+			  const struct ipu6_isys_csi2_timing *timing,
+			  unsigned int port, unsigned int nlanes)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *reg;
+	u32 port_base;
+	u32 i;
+
+	port_base = (port % 2) ? CSI2_SIP_TOP_CSI_RX_PORT_BASE_1(port) :
+		CSI2_SIP_TOP_CSI_RX_PORT_BASE_0(port);
+
+	dev_dbg(dev, "set timing for port %u with %u lanes\n", port, nlanes);
+
+	reg = isys->pdata->base + port_base;
+	reg += CSI2_SIP_TOP_CSI_RX_DLY_CNT_TERMEN_CLANE;
+
+	writel(timing->ctermen, reg);
+
+	reg = isys->pdata->base + port_base;
+	reg += CSI2_SIP_TOP_CSI_RX_DLY_CNT_SETTLE_CLANE;
+	writel(timing->csettle, reg);
+
+	for (i = 0; i < nlanes; i++) {
+		reg = isys->pdata->base + port_base;
+		reg += CSI2_SIP_TOP_CSI_RX_DLY_CNT_TERMEN_DLANE(i);
+		writel(timing->dtermen, reg);
+
+		reg = isys->pdata->base + port_base;
+		reg += CSI2_SIP_TOP_CSI_RX_DLY_CNT_SETTLE_DLANE(i);
+		writel(timing->dsettle, reg);
+	}
+}
+
+#define DPHY_TIMER_INCR	0x28
+int ipu6_isys_jsl_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	int ret = 0;
+	u32 nlanes;
+	u32 port;
+
+	if (!on)
+		return 0;
+
+	port = cfg->port;
+	nlanes = cfg->nlanes;
+
+	if (!isys_base || port >= isys->pdata->ipdata->csi2.nports) {
+		dev_warn(dev, "invalid port ID %d\n", port);
+		return -EINVAL;
+	}
+
+	ipu6_isys_csi2_phy_config_by_port(isys, port, nlanes);
+
+	writel(DPHY_TIMER_INCR,
+	       isys->pdata->base + CSI2_HUB_GPREG_DPHY_TIMER_INCR);
+
+	/* set port cfg and rx timing */
+	ipu6_isys_csi2_set_timing(isys, timing, port, nlanes);
+
+	ret = ipu6_isys_csi2_set_port_cfg(isys, port, nlanes);
+	if (ret)
+		return ret;
+
+	ipu6_isys_csi2_rx_control(isys);
+
+	return 0;
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-mcd-phy.c

@@ -0,0 +1,720 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bits.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
+#include <linux/iopoll.h>
+#include <linux/list.h>
+#include <linux/refcount.h>
+#include <linux/time64.h>
+
+#include <media/v4l2-async.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-isys.h"
+#include "ipu6-isys-csi2.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+
+#define CSI_REG_HUB_GPREG_PHY_CTL(id) (CSI_REG_BASE + 0x18008 + (id) * 0x8)
+#define CSI_REG_HUB_GPREG_PHY_CTL_RESET			BIT(4)
+#define CSI_REG_HUB_GPREG_PHY_CTL_PWR_EN		BIT(0)
+#define CSI_REG_HUB_GPREG_PHY_STATUS(id) (CSI_REG_BASE + 0x1800c + (id) * 0x8)
+#define CSI_REG_HUB_GPREG_PHY_POWER_ACK			BIT(0)
+#define CSI_REG_HUB_GPREG_PHY_READY			BIT(4)
+
+#define MCD_PHY_POWER_STATUS_TIMEOUT			(200 * USEC_PER_MSEC)
+
+/*
+ * bridge to phy in buttress reg map, each phy has 16 kbytes
+ * only 2 phys for TGL U and Y
+ */
+#define IPU6_ISYS_MCD_PHY_BASE(i)			(0x10000 + (i) * 0x4000)
+
+/*
+ *  There are 2 MCD DPHY instances on TGL and 1 MCD DPHY instance on ADL.
+ *  Each MCD PHY has 12-lanes which has 8 data lanes and 4 clock lanes.
+ *  CSI port 1, 3 (5, 7) can support max 2 data lanes.
+ *  CSI port 0, 2 (4, 6) can support max 4 data lanes.
+ *  PHY configurations are PPI based instead of port.
+ *  Left:
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | PPI     | PPI5    | PPI4    | PPI3    | PPI2   | PPI1    | PPI0     |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x4      | unused  | D3      | D2      | C0     | D0      | D1       |
+ *  |---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x2x2    | C1      | D0      | D1      | C0     | D0      | D1       |
+ *  ----------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x2x1    | C1      | D0      | unused  | C0     | D0      | D1       |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x1x1    | C1      | D0      | unused  | C0     | D0      | unused   |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x1x2    | C1      | D0      | D1      | C0     | D0      | unused   |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *
+ *  Right:
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | PPI     | PPI6    | PPI7    | PPI8    | PPI9   | PPI10   | PPI11    |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x4      | D1      | D0      | C2      | D2     | D3      | unused   |
+ *  |---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x2x2    | D1      | D0      | C2      | D1     | D0      | C3       |
+ *  ----------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x2x1    | D1      | D0      | C2      | unused | D0      | C3       |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x1x1    | unused  | D0      | C2      | unused | D0      | C3       |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *  |         |         |         |         |        |         |          |
+ *  | x1x2    | unused  | D0      | C2      | D1     | D0      | C3       |
+ *  +---------+---------+---------+---------+--------+---------+----------+
+ *
+ * ppi mapping per phy :
+ *
+ * x4 + x4:
+ * Left : port0 - PPI range {0, 1, 2, 3, 4}
+ * Right: port2 - PPI range {6, 7, 8, 9, 10}
+ *
+ * x4 + x2x2:
+ * Left: port0 - PPI range {0, 1, 2, 3, 4}
+ * Right: port2 - PPI range {6, 7, 8}, port3 - PPI range {9, 10, 11}
+ *
+ * x2x2 + x4:
+ * Left: port0 - PPI range {0, 1, 2}, port1 - PPI range {3, 4, 5}
+ * Right: port2 - PPI range {6, 7, 8, 9, 10}
+ *
+ * x2x2 + x2x2:
+ * Left : port0 - PPI range {0, 1, 2}, port1 - PPI range {3, 4, 5}
+ * Right: port2 - PPI range {6, 7, 8}, port3 - PPI range {9, 10, 11}
+ */
+
+struct phy_reg {
+	u32 reg;
+	u32 val;
+};
+
+static const struct phy_reg common_init_regs[] = {
+	/* for TGL-U, use 0x80000000 */
+	{0x00000040, 0x80000000},
+	{0x00000044, 0x00a80880},
+	{0x00000044, 0x00b80880},
+	{0x00000010, 0x0000078c},
+	{0x00000344, 0x2f4401e2},
+	{0x00000544, 0x924401e2},
+	{0x00000744, 0x594401e2},
+	{0x00000944, 0x624401e2},
+	{0x00000b44, 0xfc4401e2},
+	{0x00000d44, 0xc54401e2},
+	{0x00000f44, 0x034401e2},
+	{0x00001144, 0x8f4401e2},
+	{0x00001344, 0x754401e2},
+	{0x00001544, 0xe94401e2},
+	{0x00001744, 0xcb4401e2},
+	{0x00001944, 0xfa4401e2}
+};
+
+static const struct phy_reg x1_port0_config_regs[] = {
+	{0x00000694, 0xc80060fa},
+	{0x00000680, 0x3d4f78ea},
+	{0x00000690, 0x10a0140b},
+	{0x000006a8, 0xdf04010a},
+	{0x00000700, 0x57050060},
+	{0x00000710, 0x0030001c},
+	{0x00000738, 0x5f004444},
+	{0x0000073c, 0x78464204},
+	{0x00000748, 0x7821f940},
+	{0x0000074c, 0xb2000433},
+	{0x00000494, 0xfe6030fa},
+	{0x00000480, 0x29ef5ed0},
+	{0x00000490, 0x10a0540b},
+	{0x000004a8, 0x7a01010a},
+	{0x00000500, 0xef053460},
+	{0x00000510, 0xe030101c},
+	{0x00000538, 0xdf808444},
+	{0x0000053c, 0xc8422204},
+	{0x00000540, 0x0180088c},
+	{0x00000574, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x1_port1_config_regs[] = {
+	{0x00000c94, 0xc80060fa},
+	{0x00000c80, 0xcf47abea},
+	{0x00000c90, 0x10a0840b},
+	{0x00000ca8, 0xdf04010a},
+	{0x00000d00, 0x57050060},
+	{0x00000d10, 0x0030001c},
+	{0x00000d38, 0x5f004444},
+	{0x00000d3c, 0x78464204},
+	{0x00000d48, 0x7821f940},
+	{0x00000d4c, 0xb2000433},
+	{0x00000a94, 0xc91030fa},
+	{0x00000a80, 0x5a166ed0},
+	{0x00000a90, 0x10a0540b},
+	{0x00000aa8, 0x5d060100},
+	{0x00000b00, 0xef053460},
+	{0x00000b10, 0xa030101c},
+	{0x00000b38, 0xdf808444},
+	{0x00000b3c, 0xc8422204},
+	{0x00000b40, 0x0180088c},
+	{0x00000b74, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x1_port2_config_regs[] = {
+	{0x00001294, 0x28f000fa},
+	{0x00001280, 0x08130cea},
+	{0x00001290, 0x10a0140b},
+	{0x000012a8, 0xd704010a},
+	{0x00001300, 0x8d050060},
+	{0x00001310, 0x0030001c},
+	{0x00001338, 0xdf008444},
+	{0x0000133c, 0x78422204},
+	{0x00001348, 0x7821f940},
+	{0x0000134c, 0x5a000433},
+	{0x00001094, 0x2d20b0fa},
+	{0x00001080, 0xade75dd0},
+	{0x00001090, 0x10a0540b},
+	{0x000010a8, 0xb101010a},
+	{0x00001100, 0x33053460},
+	{0x00001110, 0x0030101c},
+	{0x00001138, 0xdf808444},
+	{0x0000113c, 0xc8422204},
+	{0x00001140, 0x8180088c},
+	{0x00001174, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x1_port3_config_regs[] = {
+	{0x00001894, 0xc80060fa},
+	{0x00001880, 0x0f90fd6a},
+	{0x00001890, 0x10a0840b},
+	{0x000018a8, 0xdf04010a},
+	{0x00001900, 0x57050060},
+	{0x00001910, 0x0030001c},
+	{0x00001938, 0x5f004444},
+	{0x0000193c, 0x78464204},
+	{0x00001948, 0x7821f940},
+	{0x0000194c, 0xb2000433},
+	{0x00001694, 0x3050d0fa},
+	{0x00001680, 0x0ef6d050},
+	{0x00001690, 0x10a0540b},
+	{0x000016a8, 0xe301010a},
+	{0x00001700, 0x69053460},
+	{0x00001710, 0xa030101c},
+	{0x00001738, 0xdf808444},
+	{0x0000173c, 0xc8422204},
+	{0x00001740, 0x0180088c},
+	{0x00001774, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x2_port0_config_regs[] = {
+	{0x00000694, 0xc80060fa},
+	{0x00000680, 0x3d4f78ea},
+	{0x00000690, 0x10a0140b},
+	{0x000006a8, 0xdf04010a},
+	{0x00000700, 0x57050060},
+	{0x00000710, 0x0030001c},
+	{0x00000738, 0x5f004444},
+	{0x0000073c, 0x78464204},
+	{0x00000748, 0x7821f940},
+	{0x0000074c, 0xb2000433},
+	{0x00000494, 0xc80060fa},
+	{0x00000480, 0x29ef5ed8},
+	{0x00000490, 0x10a0540b},
+	{0x000004a8, 0x7a01010a},
+	{0x00000500, 0xef053460},
+	{0x00000510, 0xe030101c},
+	{0x00000538, 0xdf808444},
+	{0x0000053c, 0xc8422204},
+	{0x00000540, 0x0180088c},
+	{0x00000574, 0x00000000},
+	{0x00000294, 0xc80060fa},
+	{0x00000280, 0xcb45b950},
+	{0x00000290, 0x10a0540b},
+	{0x000002a8, 0x8c01010a},
+	{0x00000300, 0xef053460},
+	{0x00000310, 0x8030101c},
+	{0x00000338, 0x41808444},
+	{0x0000033c, 0x32422204},
+	{0x00000340, 0x0180088c},
+	{0x00000374, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x2_port1_config_regs[] = {
+	{0x00000c94, 0xc80060fa},
+	{0x00000c80, 0xcf47abea},
+	{0x00000c90, 0x10a0840b},
+	{0x00000ca8, 0xdf04010a},
+	{0x00000d00, 0x57050060},
+	{0x00000d10, 0x0030001c},
+	{0x00000d38, 0x5f004444},
+	{0x00000d3c, 0x78464204},
+	{0x00000d48, 0x7821f940},
+	{0x00000d4c, 0xb2000433},
+	{0x00000a94, 0xc80060fa},
+	{0x00000a80, 0x5a166ed8},
+	{0x00000a90, 0x10a0540b},
+	{0x00000aa8, 0x7a01010a},
+	{0x00000b00, 0xef053460},
+	{0x00000b10, 0xa030101c},
+	{0x00000b38, 0xdf808444},
+	{0x00000b3c, 0xc8422204},
+	{0x00000b40, 0x0180088c},
+	{0x00000b74, 0x00000000},
+	{0x00000894, 0xc80060fa},
+	{0x00000880, 0x4d4f21d0},
+	{0x00000890, 0x10a0540b},
+	{0x000008a8, 0x5601010a},
+	{0x00000900, 0xef053460},
+	{0x00000910, 0x8030101c},
+	{0x00000938, 0xdf808444},
+	{0x0000093c, 0xc8422204},
+	{0x00000940, 0x0180088c},
+	{0x00000974, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x2_port2_config_regs[] = {
+	{0x00001294, 0xc80060fa},
+	{0x00001280, 0x08130cea},
+	{0x00001290, 0x10a0140b},
+	{0x000012a8, 0xd704010a},
+	{0x00001300, 0x8d050060},
+	{0x00001310, 0x0030001c},
+	{0x00001338, 0xdf008444},
+	{0x0000133c, 0x78422204},
+	{0x00001348, 0x7821f940},
+	{0x0000134c, 0x5a000433},
+	{0x00001094, 0xc80060fa},
+	{0x00001080, 0xade75dd8},
+	{0x00001090, 0x10a0540b},
+	{0x000010a8, 0xb101010a},
+	{0x00001100, 0x33053460},
+	{0x00001110, 0x0030101c},
+	{0x00001138, 0xdf808444},
+	{0x0000113c, 0xc8422204},
+	{0x00001140, 0x8180088c},
+	{0x00001174, 0x00000000},
+	{0x00000e94, 0xc80060fa},
+	{0x00000e80, 0x0fbf16d0},
+	{0x00000e90, 0x10a0540b},
+	{0x00000ea8, 0x7a01010a},
+	{0x00000f00, 0xf5053460},
+	{0x00000f10, 0xc030101c},
+	{0x00000f38, 0xdf808444},
+	{0x00000f3c, 0xc8422204},
+	{0x00000f40, 0x8180088c},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x2_port3_config_regs[] = {
+	{0x00001894, 0xc80060fa},
+	{0x00001880, 0x0f90fd6a},
+	{0x00001890, 0x10a0840b},
+	{0x000018a8, 0xdf04010a},
+	{0x00001900, 0x57050060},
+	{0x00001910, 0x0030001c},
+	{0x00001938, 0x5f004444},
+	{0x0000193c, 0x78464204},
+	{0x00001948, 0x7821f940},
+	{0x0000194c, 0xb2000433},
+	{0x00001694, 0xc80060fa},
+	{0x00001680, 0x0ef6d058},
+	{0x00001690, 0x10a0540b},
+	{0x000016a8, 0x7a01010a},
+	{0x00001700, 0x69053460},
+	{0x00001710, 0xa030101c},
+	{0x00001738, 0xdf808444},
+	{0x0000173c, 0xc8422204},
+	{0x00001740, 0x0180088c},
+	{0x00001774, 0x00000000},
+	{0x00001494, 0xc80060fa},
+	{0x00001480, 0xf9d34bd0},
+	{0x00001490, 0x10a0540b},
+	{0x000014a8, 0x7a01010a},
+	{0x00001500, 0x1b053460},
+	{0x00001510, 0x0030101c},
+	{0x00001538, 0xdf808444},
+	{0x0000153c, 0xc8422204},
+	{0x00001540, 0x8180088c},
+	{0x00001574, 0x00000000},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x4_port0_config_regs[] = {
+	{0x00000694, 0xc80060fa},
+	{0x00000680, 0x3d4f78fa},
+	{0x00000690, 0x10a0140b},
+	{0x000006a8, 0xdf04010a},
+	{0x00000700, 0x57050060},
+	{0x00000710, 0x0030001c},
+	{0x00000738, 0x5f004444},
+	{0x0000073c, 0x78464204},
+	{0x00000748, 0x7821f940},
+	{0x0000074c, 0xb2000433},
+	{0x00000494, 0xfe6030fa},
+	{0x00000480, 0x29ef5ed8},
+	{0x00000490, 0x10a0540b},
+	{0x000004a8, 0x7a01010a},
+	{0x00000500, 0xef053460},
+	{0x00000510, 0xe030101c},
+	{0x00000538, 0xdf808444},
+	{0x0000053c, 0xc8422204},
+	{0x00000540, 0x0180088c},
+	{0x00000574, 0x00000004},
+	{0x00000294, 0x23e030fa},
+	{0x00000280, 0xcb45b950},
+	{0x00000290, 0x10a0540b},
+	{0x000002a8, 0x8c01010a},
+	{0x00000300, 0xef053460},
+	{0x00000310, 0x8030101c},
+	{0x00000338, 0x41808444},
+	{0x0000033c, 0x32422204},
+	{0x00000340, 0x0180088c},
+	{0x00000374, 0x00000004},
+	{0x00000894, 0x5620b0fa},
+	{0x00000880, 0x4d4f21dc},
+	{0x00000890, 0x10a0540b},
+	{0x000008a8, 0x5601010a},
+	{0x00000900, 0xef053460},
+	{0x00000910, 0x8030101c},
+	{0x00000938, 0xdf808444},
+	{0x0000093c, 0xc8422204},
+	{0x00000940, 0x0180088c},
+	{0x00000974, 0x00000004},
+	{0x00000a94, 0xc91030fa},
+	{0x00000a80, 0x5a166ecc},
+	{0x00000a90, 0x10a0540b},
+	{0x00000aa8, 0x5d01010a},
+	{0x00000b00, 0xef053460},
+	{0x00000b10, 0xa030101c},
+	{0x00000b38, 0xdf808444},
+	{0x00000b3c, 0xc8422204},
+	{0x00000b40, 0x0180088c},
+	{0x00000b74, 0x00000004},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x4_port1_config_regs[] = {
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x4_port2_config_regs[] = {
+	{0x00001294, 0x28f000fa},
+	{0x00001280, 0x08130cfa},
+	{0x00001290, 0x10c0140b},
+	{0x000012a8, 0xd704010a},
+	{0x00001300, 0x8d050060},
+	{0x00001310, 0x0030001c},
+	{0x00001338, 0xdf008444},
+	{0x0000133c, 0x78422204},
+	{0x00001348, 0x7821f940},
+	{0x0000134c, 0x5a000433},
+	{0x00001094, 0x2d20b0fa},
+	{0x00001080, 0xade75dd8},
+	{0x00001090, 0x10a0540b},
+	{0x000010a8, 0xb101010a},
+	{0x00001100, 0x33053460},
+	{0x00001110, 0x0030101c},
+	{0x00001138, 0xdf808444},
+	{0x0000113c, 0xc8422204},
+	{0x00001140, 0x8180088c},
+	{0x00001174, 0x00000004},
+	{0x00000e94, 0xd308d0fa},
+	{0x00000e80, 0x0fbf16d0},
+	{0x00000e90, 0x10a0540b},
+	{0x00000ea8, 0x2c01010a},
+	{0x00000f00, 0xf5053460},
+	{0x00000f10, 0xc030101c},
+	{0x00000f38, 0xdf808444},
+	{0x00000f3c, 0xc8422204},
+	{0x00000f40, 0x8180088c},
+	{0x00000f74, 0x00000004},
+	{0x00001494, 0x136850fa},
+	{0x00001480, 0xf9d34bdc},
+	{0x00001490, 0x10a0540b},
+	{0x000014a8, 0x5a01010a},
+	{0x00001500, 0x1b053460},
+	{0x00001510, 0x0030101c},
+	{0x00001538, 0xdf808444},
+	{0x0000153c, 0xc8422204},
+	{0x00001540, 0x8180088c},
+	{0x00001574, 0x00000004},
+	{0x00001694, 0x3050d0fa},
+	{0x00001680, 0x0ef6d04c},
+	{0x00001690, 0x10a0540b},
+	{0x000016a8, 0xe301010a},
+	{0x00001700, 0x69053460},
+	{0x00001710, 0xa030101c},
+	{0x00001738, 0xdf808444},
+	{0x0000173c, 0xc8422204},
+	{0x00001740, 0x0180088c},
+	{0x00001774, 0x00000004},
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg x4_port3_config_regs[] = {
+	{0x00000000, 0x00000000}
+};
+
+static const struct phy_reg *x1_config_regs[4] = {
+	x1_port0_config_regs,
+	x1_port1_config_regs,
+	x1_port2_config_regs,
+	x1_port3_config_regs
+};
+
+static const struct phy_reg *x2_config_regs[4] = {
+	x2_port0_config_regs,
+	x2_port1_config_regs,
+	x2_port2_config_regs,
+	x2_port3_config_regs
+};
+
+static const struct phy_reg *x4_config_regs[4] = {
+	x4_port0_config_regs,
+	x4_port1_config_regs,
+	x4_port2_config_regs,
+	x4_port3_config_regs
+};
+
+static const struct phy_reg **config_regs[3] = {
+	x1_config_regs,
+	x2_config_regs,
+	x4_config_regs
+};
+
+static int ipu6_isys_mcd_phy_powerup_ack(struct ipu6_isys *isys, u8 id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	u32 val;
+	int ret;
+
+	val = readl(isys_base + CSI_REG_HUB_GPREG_PHY_CTL(id));
+	val |= CSI_REG_HUB_GPREG_PHY_CTL_PWR_EN;
+	writel(val, isys_base + CSI_REG_HUB_GPREG_PHY_CTL(id));
+
+	ret = readl_poll_timeout(isys_base + CSI_REG_HUB_GPREG_PHY_STATUS(id),
+				 val, val & CSI_REG_HUB_GPREG_PHY_POWER_ACK,
+				 200, MCD_PHY_POWER_STATUS_TIMEOUT);
+	if (ret)
+		dev_err(dev, "PHY%d powerup ack timeout", id);
+
+	return ret;
+}
+
+static int ipu6_isys_mcd_phy_powerdown_ack(struct ipu6_isys *isys, u8 id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	u32 val;
+	int ret;
+
+	writel(0, isys_base + CSI_REG_HUB_GPREG_PHY_CTL(id));
+	ret = readl_poll_timeout(isys_base + CSI_REG_HUB_GPREG_PHY_STATUS(id),
+				 val, !(val & CSI_REG_HUB_GPREG_PHY_POWER_ACK),
+				 200, MCD_PHY_POWER_STATUS_TIMEOUT);
+	if (ret)
+		dev_err(dev, "PHY%d powerdown ack timeout", id);
+
+	return ret;
+}
+
+static void ipu6_isys_mcd_phy_reset(struct ipu6_isys *isys, u8 id, bool assert)
+{
+	void __iomem *isys_base = isys->pdata->base;
+	u32 val;
+
+	val = readl(isys_base + CSI_REG_HUB_GPREG_PHY_CTL(id));
+	if (assert)
+		val |= CSI_REG_HUB_GPREG_PHY_CTL_RESET;
+	else
+		val &= ~(CSI_REG_HUB_GPREG_PHY_CTL_RESET);
+
+	writel(val, isys_base + CSI_REG_HUB_GPREG_PHY_CTL(id));
+}
+
+static int ipu6_isys_mcd_phy_ready(struct ipu6_isys *isys, u8 id)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	u32 val;
+	int ret;
+
+	ret = readl_poll_timeout(isys_base + CSI_REG_HUB_GPREG_PHY_STATUS(id),
+				 val, val & CSI_REG_HUB_GPREG_PHY_READY,
+				 200, MCD_PHY_POWER_STATUS_TIMEOUT);
+	if (ret)
+		dev_err(dev, "PHY%d ready ack timeout", id);
+
+	return ret;
+}
+
+static void ipu6_isys_mcd_phy_common_init(struct ipu6_isys *isys)
+{
+	struct ipu6_bus_device *adev = isys->adev;
+	struct ipu6_device *isp = adev->isp;
+	void __iomem *isp_base = isp->base;
+	struct sensor_async_sd *s_asd;
+	struct v4l2_async_connection *asc;
+	void __iomem *phy_base;
+	unsigned int i;
+	u8 phy_id;
+
+	list_for_each_entry(asc, &isys->notifier.done_list, asc_entry) {
+		s_asd = container_of(asc, struct sensor_async_sd, asc);
+		phy_id = s_asd->csi2.port / 4;
+		phy_base = isp_base + IPU6_ISYS_MCD_PHY_BASE(phy_id);
+
+		for (i = 0; i < ARRAY_SIZE(common_init_regs); i++)
+			writel(common_init_regs[i].val,
+			       phy_base + common_init_regs[i].reg);
+	}
+}
+
+static int ipu6_isys_driver_port_to_phy_port(struct ipu6_isys_csi2_config *cfg)
+{
+	int phy_port;
+	int ret;
+
+	if (!(cfg->nlanes == 4 || cfg->nlanes == 2 || cfg->nlanes == 1))
+		return -EINVAL;
+
+	/* B,F -> C0 A,E -> C1 C,G -> C2 D,H -> C4 */
+	/* normalize driver port number */
+	phy_port = cfg->port % 4;
+
+	/* swap port number only for A and B */
+	if (phy_port == 0)
+		phy_port = 1;
+	else if (phy_port == 1)
+		phy_port = 0;
+
+	ret = phy_port;
+
+	/* check validity per lane configuration */
+	if (cfg->nlanes == 4 && !(phy_port == 0 || phy_port == 2))
+		ret = -EINVAL;
+	else if ((cfg->nlanes == 2 || cfg->nlanes == 1) &&
+		 !(phy_port >= 0 && phy_port <= 3))
+		ret = -EINVAL;
+
+	return ret;
+}
+
+static int ipu6_isys_mcd_phy_config(struct ipu6_isys *isys)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_bus_device *adev = isys->adev;
+	const struct phy_reg **phy_config_regs;
+	struct ipu6_device *isp = adev->isp;
+	void __iomem *isp_base = isp->base;
+	struct sensor_async_sd *s_asd;
+	struct ipu6_isys_csi2_config cfg;
+	struct v4l2_async_connection *asc;
+	int phy_port, phy_id;
+	unsigned int i;
+	void __iomem *phy_base;
+
+	list_for_each_entry(asc, &isys->notifier.done_list, asc_entry) {
+		s_asd = container_of(asc, struct sensor_async_sd, asc);
+		cfg.port = s_asd->csi2.port;
+		cfg.nlanes = s_asd->csi2.nlanes;
+		phy_port = ipu6_isys_driver_port_to_phy_port(&cfg);
+		if (phy_port < 0) {
+			dev_err(dev, "invalid port %d for lane %d", cfg.port,
+				cfg.nlanes);
+			return -ENXIO;
+		}
+
+		phy_id = cfg.port / 4;
+		phy_base = isp_base + IPU6_ISYS_MCD_PHY_BASE(phy_id);
+		dev_dbg(dev, "port%d PHY%u lanes %u\n", cfg.port, phy_id,
+			cfg.nlanes);
+
+		phy_config_regs = config_regs[cfg.nlanes / 2];
+		cfg.port = phy_port;
+		for (i = 0; phy_config_regs[cfg.port][i].reg; i++)
+			writel(phy_config_regs[cfg.port][i].val,
+			       phy_base + phy_config_regs[cfg.port][i].reg);
+	}
+
+	return 0;
+}
+
+#define CSI_MCD_PHY_NUM		2
+static refcount_t phy_power_ref_count[CSI_MCD_PHY_NUM];
+
+int ipu6_isys_mcd_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on)
+{
+	struct device *dev = &isys->adev->auxdev.dev;
+	void __iomem *isys_base = isys->pdata->base;
+	u8 port, phy_id;
+	refcount_t *ref;
+	int ret;
+
+	port = cfg->port;
+	phy_id = port / 4;
+
+	ref = &phy_power_ref_count[phy_id];
+
+	dev_dbg(dev, "for phy %d port %d, lanes: %d\n", phy_id, port,
+		cfg->nlanes);
+
+	if (!isys_base || port >= isys->pdata->ipdata->csi2.nports) {
+		dev_warn(dev, "invalid port ID %d\n", port);
+		return -EINVAL;
+	}
+
+	if (on) {
+		if (refcount_read(ref)) {
+			dev_dbg(dev, "for phy %d is already UP", phy_id);
+			refcount_inc(ref);
+			return 0;
+		}
+
+		ret = ipu6_isys_mcd_phy_powerup_ack(isys, phy_id);
+		if (ret)
+			return ret;
+
+		ipu6_isys_mcd_phy_reset(isys, phy_id, 0);
+		ipu6_isys_mcd_phy_common_init(isys);
+
+		ret = ipu6_isys_mcd_phy_config(isys);
+		if (ret)
+			return ret;
+
+		ipu6_isys_mcd_phy_reset(isys, phy_id, 1);
+		ret = ipu6_isys_mcd_phy_ready(isys, phy_id);
+		if (ret)
+			return ret;
+
+		refcount_set(ref, 1);
+		return 0;
+	}
+
+	if (!refcount_dec_and_test(ref))
+		return 0;
+
+	return ipu6_isys_mcd_phy_powerdown_ack(isys, phy_id);
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-queue.c

@@ -0,0 +1,857 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+#include <linux/atomic.h>
+#include <linux/cleanup.h>
+#include <linux/bug.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/lockdep.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-sg.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-dma.h"
+#include "ipu6-fw-isys.h"
+#include "ipu6-isys.h"
+#include "ipu6-isys-video.h"
+
+static int ipu6_isys_buf_init(struct vb2_buffer *vb)
+{
+	struct ipu6_isys *isys = vb2_get_drv_priv(vb->vb2_queue);
+	struct sg_table *sg = vb2_dma_sg_plane_desc(vb, 0);
+	struct vb2_v4l2_buffer *vvb = to_vb2_v4l2_buffer(vb);
+	struct ipu6_isys_video_buffer *ivb =
+		vb2_buffer_to_ipu6_isys_video_buffer(vvb);
+	int ret;
+
+	ret = ipu6_dma_map_sgtable(isys->adev, sg, DMA_TO_DEVICE, 0);
+	if (ret)
+		return ret;
+
+	ivb->dma_addr = sg_dma_address(sg->sgl);
+
+	return 0;
+}
+
+static void ipu6_isys_buf_cleanup(struct vb2_buffer *vb)
+{
+	struct ipu6_isys *isys = vb2_get_drv_priv(vb->vb2_queue);
+	struct sg_table *sg = vb2_dma_sg_plane_desc(vb, 0);
+	struct vb2_v4l2_buffer *vvb = to_vb2_v4l2_buffer(vb);
+	struct ipu6_isys_video_buffer *ivb =
+		vb2_buffer_to_ipu6_isys_video_buffer(vvb);
+
+	ivb->dma_addr = 0;
+	ipu6_dma_unmap_sgtable(isys->adev, sg, DMA_TO_DEVICE, 0);
+}
+
+static int ipu6_isys_queue_setup(struct vb2_queue *q, unsigned int *num_buffers,
+				 unsigned int *num_planes, unsigned int sizes[],
+				 struct device *alloc_devs[])
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(q);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	u32 size = ipu6_isys_get_data_size(av);
+
+	/* num_planes == 0: we're being called through VIDIOC_REQBUFS */
+	if (!*num_planes) {
+		sizes[0] = size;
+	} else if (sizes[0] < size) {
+		dev_dbg(dev, "%s: queue setup: size %u < %u\n",
+			av->vdev.name, sizes[0], size);
+		return -EINVAL;
+	}
+
+	*num_planes = 1;
+
+	return 0;
+}
+
+static int ipu6_isys_buf_prepare(struct vb2_buffer *vb)
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(vb->vb2_queue);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	u32 bytesperline = ipu6_isys_get_bytes_per_line(av);
+	u32 height = ipu6_isys_get_frame_height(av);
+	u32 size = ipu6_isys_get_data_size(av);
+
+	dev_dbg(dev, "buffer: %s: configured size %u, buffer size %lu\n",
+		av->vdev.name, size, vb2_plane_size(vb, 0));
+
+	if (size > vb2_plane_size(vb, 0))
+		return -EINVAL;
+
+	vb2_set_plane_payload(vb, 0, bytesperline * height);
+
+	return 0;
+}
+
+/*
+ * Queue a buffer list back to incoming or active queues. The buffers
+ * are removed from the buffer list.
+ */
+void ipu6_isys_buffer_list_queue(struct ipu6_isys_buffer_list *bl,
+				 unsigned long op_flags,
+				 enum vb2_buffer_state state)
+{
+	struct ipu6_isys_buffer *ib, *ib_safe;
+	unsigned long flags;
+	bool first = true;
+
+	if (!bl)
+		return;
+
+	WARN_ON_ONCE(!bl->nbufs);
+	WARN_ON_ONCE(op_flags & IPU6_ISYS_BUFFER_LIST_FL_ACTIVE &&
+		     op_flags & IPU6_ISYS_BUFFER_LIST_FL_INCOMING);
+
+	list_for_each_entry_safe(ib, ib_safe, &bl->head, head) {
+		struct ipu6_isys_video *av;
+		struct vb2_buffer *vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+		struct ipu6_isys_queue *aq =
+			vb2_queue_to_isys_queue(vb->vb2_queue);
+		struct device *dev;
+
+		av = ipu6_isys_queue_to_video(aq);
+		dev = &av->isys->adev->auxdev.dev;
+		spin_lock_irqsave(&aq->lock, flags);
+		list_del(&ib->head);
+		if (op_flags & IPU6_ISYS_BUFFER_LIST_FL_ACTIVE)
+			list_add(&ib->head, &aq->active);
+		else if (op_flags & IPU6_ISYS_BUFFER_LIST_FL_INCOMING)
+			list_add_tail(&ib->head, &aq->incoming);
+		spin_unlock_irqrestore(&aq->lock, flags);
+
+		if (first) {
+			dev_dbg(dev,
+				"queue buf list %p flags %lx, s %d, %d bufs\n",
+				bl, op_flags, state, bl->nbufs);
+			first = false;
+		}
+
+		bl->nbufs--;
+	}
+
+	WARN_ON(bl->nbufs);
+}
+
+/*
+ * flush_firmware_streamon_fail() - Flush in cases where requests may
+ * have been queued to firmware and the *firmware streamon fails for a
+ * reason or another.
+ */
+static void flush_firmware_streamon_fail(struct ipu6_isys_stream *stream)
+{
+	struct device *dev = &stream->isys->adev->auxdev.dev;
+	struct ipu6_isys_queue *aq;
+	unsigned long flags;
+
+	lockdep_assert_held(&stream->mutex);
+
+	list_for_each_entry(aq, &stream->queues, node) {
+		struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+		struct ipu6_isys_buffer *ib, *ib_safe;
+
+		spin_lock_irqsave(&aq->lock, flags);
+		list_for_each_entry_safe(ib, ib_safe, &aq->active, head) {
+			struct vb2_buffer *vb =
+				ipu6_isys_buffer_to_vb2_buffer(ib);
+
+			list_del(&ib->head);
+			if (av->streaming) {
+				dev_dbg(dev,
+					"%s: queue buffer %u back to incoming\n",
+					av->vdev.name, vb->index);
+				/* Queue already streaming, return to driver. */
+				list_add(&ib->head, &aq->incoming);
+				continue;
+			}
+			/* Queue not yet streaming, return to user. */
+			dev_dbg(dev, "%s: return %u back to videobuf2\n",
+				av->vdev.name, vb->index);
+			vb2_buffer_done(ipu6_isys_buffer_to_vb2_buffer(ib),
+					VB2_BUF_STATE_QUEUED);
+		}
+		spin_unlock_irqrestore(&aq->lock, flags);
+	}
+}
+
+/*
+ * Attempt obtaining a buffer list from the incoming queues, a list of buffers
+ * that contains one entry from each video buffer queue. If a buffer can't be
+ * obtained from every queue, the buffers are returned back to the queue.
+ */
+static int buffer_list_get(struct ipu6_isys_stream *stream,
+			   struct ipu6_isys_buffer_list *bl)
+{
+	struct device *dev = &stream->isys->adev->auxdev.dev;
+	struct ipu6_isys_queue *aq;
+	unsigned long flags;
+	unsigned long buf_flag = IPU6_ISYS_BUFFER_LIST_FL_INCOMING;
+
+	lockdep_assert_held(&stream->mutex);
+
+	bl->nbufs = 0;
+	INIT_LIST_HEAD(&bl->head);
+
+	list_for_each_entry(aq, &stream->queues, node) {
+		struct ipu6_isys_buffer *ib;
+
+		spin_lock_irqsave(&aq->lock, flags);
+		if (list_empty(&aq->incoming)) {
+			spin_unlock_irqrestore(&aq->lock, flags);
+			if (!list_empty(&bl->head))
+				ipu6_isys_buffer_list_queue(bl, buf_flag, 0);
+			return -ENODATA;
+		}
+
+		ib = list_last_entry(&aq->incoming,
+				     struct ipu6_isys_buffer, head);
+
+		dev_dbg(dev, "buffer: %s: buffer %u\n",
+			ipu6_isys_queue_to_video(aq)->vdev.name,
+			ipu6_isys_buffer_to_vb2_buffer(ib)->index);
+		list_del(&ib->head);
+		list_add(&ib->head, &bl->head);
+		spin_unlock_irqrestore(&aq->lock, flags);
+
+		bl->nbufs++;
+	}
+
+	dev_dbg(dev, "get buffer list %p, %u buffers\n", bl, bl->nbufs);
+
+	return 0;
+}
+
+static void
+ipu6_isys_buf_to_fw_frame_buf_pin(struct vb2_buffer *vb,
+				  struct ipu6_fw_isys_frame_buff_set_abi *set)
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(vb->vb2_queue);
+	struct vb2_v4l2_buffer *vvb = to_vb2_v4l2_buffer(vb);
+	struct ipu6_isys_video_buffer *ivb =
+		vb2_buffer_to_ipu6_isys_video_buffer(vvb);
+
+	set->output_pins[aq->fw_output].addr = ivb->dma_addr;
+	set->output_pins[aq->fw_output].out_buf_id = vb->index + 1;
+}
+
+/*
+ * Convert a buffer list to a isys fw ABI framebuffer set. The
+ * buffer list is not modified.
+ */
+#define IPU6_ISYS_FRAME_NUM_THRESHOLD  (30)
+void
+ipu6_isys_buf_to_fw_frame_buf(struct ipu6_fw_isys_frame_buff_set_abi *set,
+			      struct ipu6_isys_stream *stream,
+			      struct ipu6_isys_buffer_list *bl)
+{
+	struct ipu6_isys_buffer *ib;
+
+	WARN_ON(!bl->nbufs);
+
+	set->send_irq_sof = 1;
+	set->send_resp_sof = 1;
+	set->send_irq_eof = 0;
+	set->send_resp_eof = 0;
+
+	if (stream->streaming)
+		set->send_irq_capture_ack = 0;
+	else
+		set->send_irq_capture_ack = 1;
+	set->send_irq_capture_done = 0;
+
+	set->send_resp_capture_ack = 1;
+	set->send_resp_capture_done = 1;
+	if (atomic_read(&stream->sequence) >= IPU6_ISYS_FRAME_NUM_THRESHOLD) {
+		set->send_resp_capture_ack = 0;
+		set->send_resp_capture_done = 0;
+	}
+
+	list_for_each_entry(ib, &bl->head, head) {
+		struct vb2_buffer *vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+
+		ipu6_isys_buf_to_fw_frame_buf_pin(vb, set);
+	}
+}
+
+/* Start streaming for real. The buffer list must be available. */
+static int ipu6_isys_stream_start(struct ipu6_isys_video *av,
+				  struct ipu6_isys_buffer_list *bl)
+{
+	struct ipu6_isys_stream *stream = av->stream;
+	struct device *dev = &stream->isys->adev->auxdev.dev;
+	struct ipu6_isys_buffer_list __bl;
+	int ret;
+
+	guard(mutex)(&stream->isys->stream_mutex);
+	ret = ipu6_isys_video_set_streaming(av, 1, bl);
+	if (ret)
+		goto out_requeue;
+
+	stream->streaming = 1;
+
+	bl = &__bl;
+
+	do {
+		struct ipu6_fw_isys_frame_buff_set_abi *buf = NULL;
+		struct isys_fw_msgs *msg;
+		u16 send_type = IPU6_FW_ISYS_SEND_TYPE_STREAM_CAPTURE;
+
+		ret = buffer_list_get(stream, bl);
+		if (ret < 0)
+			break;
+
+		msg = ipu6_get_fw_msg_buf(stream);
+		if (!msg)
+			return -ENOMEM;
+
+		buf = &msg->fw_msg.frame;
+		ipu6_isys_buf_to_fw_frame_buf(buf, stream, bl);
+		ipu6_fw_isys_dump_frame_buff_set(dev, buf,
+						 stream->nr_output_pins);
+		ipu6_isys_buffer_list_queue(bl, IPU6_ISYS_BUFFER_LIST_FL_ACTIVE,
+					    0);
+		ret = ipu6_fw_isys_complex_cmd(stream->isys,
+					       stream->stream_handle, buf,
+					       msg->dma_addr, sizeof(*buf),
+					       send_type);
+	} while (!WARN_ON(ret));
+
+	return 0;
+
+out_requeue:
+	if (bl && bl->nbufs)
+		ipu6_isys_buffer_list_queue(bl,
+					    IPU6_ISYS_BUFFER_LIST_FL_INCOMING,
+					    VB2_BUF_STATE_QUEUED);
+	flush_firmware_streamon_fail(stream);
+
+	return ret;
+}
+
+static void buf_queue(struct vb2_buffer *vb)
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(vb->vb2_queue);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct vb2_v4l2_buffer *vvb = to_vb2_v4l2_buffer(vb);
+	struct ipu6_isys_video_buffer *ivb =
+		vb2_buffer_to_ipu6_isys_video_buffer(vvb);
+	struct ipu6_isys_buffer *ib = &ivb->ib;
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	struct ipu6_fw_isys_frame_buff_set_abi *buf = NULL;
+	struct ipu6_isys_stream *stream = av->stream;
+	struct ipu6_isys_buffer_list bl;
+	struct isys_fw_msgs *msg;
+	unsigned long flags;
+	dma_addr_t dma;
+	int ret;
+
+	dev_dbg(dev, "queue buffer %u for %s\n", vb->index, av->vdev.name);
+
+	dma = ivb->dma_addr;
+	dev_dbg(dev, "iova: iova %pad\n", &dma);
+
+	spin_lock_irqsave(&aq->lock, flags);
+	list_add(&ib->head, &aq->incoming);
+	spin_unlock_irqrestore(&aq->lock, flags);
+
+	if (!vb2_start_streaming_called(vb->vb2_queue)) {
+		dev_dbg(dev, "start_streaming hasn't been called yet on %s\n",
+			av->vdev.name);
+		return;
+	}
+
+	mutex_lock(&stream->mutex);
+
+	if (stream->nr_streaming != stream->nr_queues) {
+		dev_dbg(dev, "not streaming yet, adding to incoming\n");
+		goto out;
+	}
+
+	/*
+	 * We just put one buffer to the incoming list of this queue
+	 * (above). Let's see whether all queues in the pipeline would
+	 * have a buffer.
+	 */
+	ret = buffer_list_get(stream, &bl);
+	if (ret < 0) {
+		dev_dbg(dev, "No buffers available\n");
+		goto out;
+	}
+
+	msg = ipu6_get_fw_msg_buf(stream);
+	if (!msg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	buf = &msg->fw_msg.frame;
+	ipu6_isys_buf_to_fw_frame_buf(buf, stream, &bl);
+	ipu6_fw_isys_dump_frame_buff_set(dev, buf, stream->nr_output_pins);
+
+	/*
+	 * We must queue the buffers in the buffer list to the
+	 * appropriate video buffer queues BEFORE passing them to the
+	 * firmware since we could get a buffer event back before we
+	 * have queued them ourselves to the active queue.
+	 */
+	ipu6_isys_buffer_list_queue(&bl, IPU6_ISYS_BUFFER_LIST_FL_ACTIVE, 0);
+
+	ret = ipu6_fw_isys_complex_cmd(stream->isys, stream->stream_handle,
+				       buf, msg->dma_addr, sizeof(*buf),
+				       IPU6_FW_ISYS_SEND_TYPE_STREAM_CAPTURE);
+	if (ret < 0)
+		dev_err(dev, "send stream capture failed\n");
+
+out:
+	mutex_unlock(&stream->mutex);
+}
+
+static int ipu6_isys_link_fmt_validate(struct ipu6_isys_queue *aq)
+{
+	struct v4l2_mbus_framefmt format, *__format;
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	struct media_pad *remote_pad =
+		media_pad_remote_pad_first(av->vdev.entity.pads);
+	struct v4l2_subdev *sd;
+	u32 r_stream, code;
+
+	if (!remote_pad)
+		return -ENOTCONN;
+
+	sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+	r_stream = ipu6_isys_get_src_stream_by_src_pad(sd, remote_pad->index);
+
+	struct v4l2_subdev_state *state =
+		v4l2_subdev_lock_and_get_active_state(sd);
+
+	__format = v4l2_subdev_state_get_format(state, remote_pad->index,
+						r_stream);
+	if (__format)
+		format = *__format;
+
+	v4l2_subdev_unlock_state(state);
+
+	if (!__format) {
+		dev_dbg(dev, "failed to get %s: pad %d, stream:%d format\n",
+			sd->entity.name, remote_pad->index, r_stream);
+		return -EPIPE;
+	}
+
+	if (format.width != ipu6_isys_get_frame_width(av) ||
+	    format.height != ipu6_isys_get_frame_height(av)) {
+		dev_dbg(dev, "wrong width or height %ux%u (%ux%u expected)\n",
+			ipu6_isys_get_frame_width(av),
+			ipu6_isys_get_frame_height(av), format.width,
+			format.height);
+		return -EINVAL;
+	}
+
+	code = ipu6_isys_get_isys_format(ipu6_isys_get_format(av), 0)->code;
+	if (format.code != code) {
+		dev_dbg(dev, "wrong mbus code 0x%8.8x (0x%8.8x expected)\n",
+			code, format.code);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void return_buffers(struct ipu6_isys_queue *aq,
+			   enum vb2_buffer_state state)
+{
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct ipu6_isys_buffer *ib;
+	bool need_reset = false;
+	unsigned long flags;
+
+	spin_lock_irqsave(&aq->lock, flags);
+	while (!list_empty(&aq->incoming)) {
+		struct vb2_buffer *vb;
+
+		ib = list_first_entry(&aq->incoming, struct ipu6_isys_buffer,
+				      head);
+		vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+		list_del(&ib->head);
+		spin_unlock_irqrestore(&aq->lock, flags);
+
+		vb2_buffer_done(vb, state);
+
+		spin_lock_irqsave(&aq->lock, flags);
+	}
+
+	/*
+	 * Something went wrong (FW crash / HW hang / not all buffers
+	 * returned from isys) if there are still buffers queued in active
+	 * queue. We have to clean up places a bit.
+	 */
+	while (!list_empty(&aq->active)) {
+		struct vb2_buffer *vb;
+
+		ib = list_first_entry(&aq->active, struct ipu6_isys_buffer,
+				      head);
+		vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+
+		list_del(&ib->head);
+		spin_unlock_irqrestore(&aq->lock, flags);
+
+		vb2_buffer_done(vb, state);
+
+		spin_lock_irqsave(&aq->lock, flags);
+		need_reset = true;
+	}
+
+	spin_unlock_irqrestore(&aq->lock, flags);
+
+	if (need_reset) {
+		mutex_lock(&av->isys->mutex);
+		av->isys->need_reset = true;
+		mutex_unlock(&av->isys->mutex);
+	}
+}
+
+static void ipu6_isys_stream_cleanup(struct ipu6_isys_video *av)
+{
+	video_device_pipeline_stop(&av->vdev);
+	ipu6_isys_put_stream(av->stream);
+	av->stream = NULL;
+}
+
+static int start_streaming(struct vb2_queue *q, unsigned int count)
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(q);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	const struct ipu6_isys_pixelformat *pfmt =
+		ipu6_isys_get_isys_format(ipu6_isys_get_format(av), 0);
+	struct ipu6_isys_buffer_list __bl, *bl = NULL;
+	struct ipu6_isys_stream *stream;
+	struct media_pad *source_pad, *remote_pad;
+	int nr_queues, ret;
+
+	dev_dbg(dev, "stream: %s: width %u, height %u, css pixelformat %u\n",
+		av->vdev.name, ipu6_isys_get_frame_width(av),
+		ipu6_isys_get_frame_height(av), pfmt->css_pixelformat);
+
+	remote_pad = media_pad_remote_pad_unique(&av->pad);
+	if (IS_ERR(remote_pad)) {
+		dev_dbg(dev, "failed to get remote pad\n");
+		ret = PTR_ERR(remote_pad);
+		goto out_return_buffers;
+	}
+
+	source_pad = media_pad_remote_pad_unique(&remote_pad->entity->pads[0]);
+	if (IS_ERR(source_pad)) {
+		dev_dbg(dev, "No external source entity\n");
+		ret = PTR_ERR(source_pad);
+		goto out_return_buffers;
+	}
+
+	ret = ipu6_isys_setup_video(av, remote_pad, source_pad, &nr_queues);
+	if (ret < 0) {
+		dev_dbg(dev, "failed to setup video\n");
+		goto out_return_buffers;
+	}
+
+	ret = ipu6_isys_link_fmt_validate(aq);
+	if (ret) {
+		dev_dbg(dev,
+			"%s: link format validation failed (%d)\n",
+			av->vdev.name, ret);
+		goto out_pipeline_stop;
+	}
+
+	ret = ipu6_isys_fw_open(av->isys);
+	if (ret)
+		goto out_pipeline_stop;
+
+	stream = av->stream;
+	mutex_lock(&stream->mutex);
+	if (!stream->nr_streaming) {
+		ret = ipu6_isys_video_prepare_stream(av, source_pad->entity,
+						     nr_queues);
+		if (ret)
+			goto out_fw_close;
+	}
+
+	stream->nr_streaming++;
+	dev_dbg(dev, "queue %u of %u\n", stream->nr_streaming,
+		stream->nr_queues);
+
+	list_add(&aq->node, &stream->queues);
+	ipu6_isys_configure_stream_watermark(av, source_pad->entity);
+	ipu6_isys_update_stream_watermark(av, true);
+
+	if (stream->nr_streaming != stream->nr_queues)
+		goto out;
+
+	bl = &__bl;
+	ret = buffer_list_get(stream, bl);
+	if (ret < 0) {
+		dev_warn(dev, "no buffer available, DRIVER BUG?\n");
+		goto out;
+	}
+
+	ret = ipu6_isys_stream_start(av, bl);
+	if (ret)
+		goto out_stream_start;
+
+out:
+	mutex_unlock(&stream->mutex);
+
+	return 0;
+
+out_stream_start:
+	ipu6_isys_update_stream_watermark(av, false);
+	list_del(&aq->node);
+	stream->nr_streaming--;
+
+out_fw_close:
+	mutex_unlock(&stream->mutex);
+	ipu6_isys_fw_close(av->isys);
+
+out_pipeline_stop:
+	ipu6_isys_stream_cleanup(av);
+
+out_return_buffers:
+	return_buffers(aq, VB2_BUF_STATE_QUEUED);
+
+	return ret;
+}
+
+static void stop_streaming(struct vb2_queue *q)
+{
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(q);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct ipu6_isys_stream *stream = av->stream;
+
+	mutex_lock(&stream->mutex);
+
+	ipu6_isys_update_stream_watermark(av, false);
+
+	mutex_lock(&av->isys->stream_mutex);
+	if (stream->nr_streaming == stream->nr_queues && stream->streaming)
+		ipu6_isys_video_set_streaming(av, 0, NULL);
+	list_del(&aq->node);
+	mutex_unlock(&av->isys->stream_mutex);
+
+	stream->nr_streaming--;
+	stream->streaming = 0;
+	mutex_unlock(&stream->mutex);
+
+	ipu6_isys_stream_cleanup(av);
+
+	return_buffers(aq, VB2_BUF_STATE_ERROR);
+
+	ipu6_isys_fw_close(av->isys);
+}
+
+static unsigned int
+get_sof_sequence_by_timestamp(struct ipu6_isys_stream *stream, u64 time)
+{
+	struct ipu6_isys *isys = stream->isys;
+	struct device *dev = &isys->adev->auxdev.dev;
+	unsigned int i;
+
+	/*
+	 * The timestamp is invalid as no TSC in some FPGA platform,
+	 * so get the sequence from pipeline directly in this case.
+	 */
+	if (time == 0)
+		return atomic_read(&stream->sequence) - 1;
+
+	for (i = 0; i < IPU6_ISYS_MAX_PARALLEL_SOF; i++)
+		if (time == stream->seq[i].timestamp) {
+			dev_dbg(dev, "sof: using seq nr %u for ts %llu\n",
+				stream->seq[i].sequence, time);
+			return stream->seq[i].sequence;
+		}
+
+	for (i = 0; i < IPU6_ISYS_MAX_PARALLEL_SOF; i++)
+		dev_dbg(dev, "sof: sequence %u, timestamp value %llu\n",
+			stream->seq[i].sequence, stream->seq[i].timestamp);
+
+	return 0;
+}
+
+static u64 get_sof_ns_delta(struct ipu6_isys_video *av, u64 timestamp)
+{
+	struct ipu6_bus_device *adev = av->isys->adev;
+	struct ipu6_device *isp = adev->isp;
+	u64 delta, tsc_now;
+
+	ipu6_buttress_tsc_read(isp, &tsc_now);
+	if (!tsc_now)
+		return 0;
+
+	delta = tsc_now - timestamp;
+
+	return ipu6_buttress_tsc_ticks_to_ns(delta, isp);
+}
+
+static void
+ipu6_isys_buf_calc_sequence_time(struct ipu6_isys_buffer *ib, u64 time)
+{
+	struct vb2_buffer *vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct ipu6_isys_queue *aq = vb2_queue_to_isys_queue(vb->vb2_queue);
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct device *dev = &av->isys->adev->auxdev.dev;
+	struct ipu6_isys_stream *stream = av->stream;
+	u64 ns;
+	u32 sequence;
+
+	ns = ktime_get_ns() - get_sof_ns_delta(av, time);
+	sequence = get_sof_sequence_by_timestamp(stream, time);
+
+	vbuf->vb2_buf.timestamp = ns;
+	vbuf->sequence = sequence;
+
+	dev_dbg(dev, "buf: %s: buffer done, CPU-timestamp:%lld, sequence:%d\n",
+		av->vdev.name, ktime_get_ns(), sequence);
+	dev_dbg(dev, "index:%d, vbuf timestamp:%lld\n", vb->index,
+		vbuf->vb2_buf.timestamp);
+}
+
+static void ipu6_isys_queue_buf_done(struct ipu6_isys_buffer *ib)
+{
+	struct vb2_buffer *vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+
+	if (atomic_read(&ib->str2mmio_flag)) {
+		vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+		/*
+		 * Operation on buffer is ended with error and will be reported
+		 * to the userspace when it is de-queued
+		 */
+		atomic_set(&ib->str2mmio_flag, 0);
+	} else {
+		vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+	}
+}
+
+static void
+ipu6_stream_buf_ready(struct ipu6_isys_stream *stream, u8 pin_id, u32 pin_addr,
+		      u64 time, bool error_check)
+{
+	struct ipu6_isys_queue *aq = stream->output_pins_queue[pin_id];
+	struct ipu6_isys *isys = stream->isys;
+	struct device *dev = &isys->adev->auxdev.dev;
+	struct ipu6_isys_buffer *ib;
+	struct vb2_buffer *vb;
+	unsigned long flags;
+	bool first = true;
+	struct vb2_v4l2_buffer *buf;
+
+	spin_lock_irqsave(&aq->lock, flags);
+	if (list_empty(&aq->active)) {
+		spin_unlock_irqrestore(&aq->lock, flags);
+		dev_err(dev, "active queue empty\n");
+		return;
+	}
+
+	list_for_each_entry_reverse(ib, &aq->active, head) {
+		struct ipu6_isys_video_buffer *ivb;
+		struct vb2_v4l2_buffer *vvb;
+		dma_addr_t addr;
+
+		vb = ipu6_isys_buffer_to_vb2_buffer(ib);
+		vvb = to_vb2_v4l2_buffer(vb);
+		ivb = vb2_buffer_to_ipu6_isys_video_buffer(vvb);
+		addr = ivb->dma_addr;
+
+		if (pin_addr != addr) {
+			if (first)
+				dev_err(dev, "Unexpected buffer address %pad\n",
+					&addr);
+			first = false;
+			continue;
+		}
+
+		if (error_check) {
+			/*
+			 * Check for error message:
+			 * 'IPU6_FW_ISYS_ERROR_HW_REPORTED_STR2MMIO'
+			 */
+			atomic_set(&ib->str2mmio_flag, 1);
+		}
+		dev_dbg(dev, "buffer: found buffer %pad\n", &addr);
+
+		buf = to_vb2_v4l2_buffer(vb);
+		buf->field = V4L2_FIELD_NONE;
+
+		list_del(&ib->head);
+		spin_unlock_irqrestore(&aq->lock, flags);
+
+		ipu6_isys_buf_calc_sequence_time(ib, time);
+
+		ipu6_isys_queue_buf_done(ib);
+
+		return;
+	}
+
+	dev_err(dev, "Failed to find a matching video buffer\n");
+
+	spin_unlock_irqrestore(&aq->lock, flags);
+}
+
+void ipu6_isys_queue_buf_ready(struct ipu6_isys_stream *stream,
+			       struct ipu6_fw_isys_resp_info_abi *info)
+{
+	u64 time = (u64)info->timestamp[1] << 32 | info->timestamp[0];
+	bool err = info->error_info.error == IPU6_FW_ISYS_ERROR_HW_REPORTED_STR2MMIO;
+
+	ipu6_stream_buf_ready(stream, info->pin_id, info->pin.addr, time, err);
+}
+
+static const struct vb2_ops ipu6_isys_queue_ops = {
+	.queue_setup = ipu6_isys_queue_setup,
+	.buf_init = ipu6_isys_buf_init,
+	.buf_prepare = ipu6_isys_buf_prepare,
+	.buf_cleanup = ipu6_isys_buf_cleanup,
+	.start_streaming = start_streaming,
+	.stop_streaming = stop_streaming,
+	.buf_queue = buf_queue,
+};
+
+int ipu6_isys_queue_init(struct ipu6_isys_queue *aq)
+{
+	struct ipu6_isys *isys = ipu6_isys_queue_to_video(aq)->isys;
+	struct ipu6_isys_video *av = ipu6_isys_queue_to_video(aq);
+	struct ipu6_bus_device *adev = isys->adev;
+	int ret;
+
+	/* no support for userptr */
+	if (!aq->vbq.io_modes)
+		aq->vbq.io_modes = VB2_MMAP | VB2_DMABUF;
+
+	aq->vbq.drv_priv = isys;
+	aq->vbq.ops = &ipu6_isys_queue_ops;
+	aq->vbq.lock = &av->mutex;
+	aq->vbq.mem_ops = &vb2_dma_sg_memops;
+	aq->vbq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	aq->vbq.min_queued_buffers = 1;
+	aq->vbq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+
+	ret = vb2_queue_init(&aq->vbq);
+	if (ret)
+		return ret;
+
+	aq->vbq.dev = &adev->isp->pdev->dev;
+	spin_lock_init(&aq->lock);
+	INIT_LIST_HEAD(&aq->active);
+	INIT_LIST_HEAD(&aq->incoming);
+
+	return 0;
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-queue.h

@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_ISYS_QUEUE_H
+#define IPU6_ISYS_QUEUE_H
+
+#include <linux/container_of.h>
+#include <linux/atomic.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/spinlock_types.h>
+
+#include <media/videobuf2-v4l2.h>
+
+#include "ipu6-fw-isys.h"
+#include "ipu6-isys-video.h"
+
+struct ipu6_isys_stream;
+
+struct ipu6_isys_queue {
+	struct vb2_queue vbq;
+	struct list_head node;
+	spinlock_t lock; /* Protects active and incoming lists */
+	struct list_head active;
+	struct list_head incoming;
+	unsigned int fw_output;
+};
+
+struct ipu6_isys_buffer {
+	struct list_head head;
+	atomic_t str2mmio_flag;
+};
+
+struct ipu6_isys_video_buffer {
+	struct vb2_v4l2_buffer vb_v4l2;
+	struct ipu6_isys_buffer ib;
+	dma_addr_t dma_addr;
+};
+
+#define IPU6_ISYS_BUFFER_LIST_FL_INCOMING	BIT(0)
+#define IPU6_ISYS_BUFFER_LIST_FL_ACTIVE	BIT(1)
+
+struct ipu6_isys_buffer_list {
+	struct list_head head;
+	unsigned int nbufs;
+};
+
+#define vb2_queue_to_isys_queue(__vb2) \
+	container_of(__vb2, struct ipu6_isys_queue, vbq)
+
+#define ipu6_isys_to_isys_video_buffer(__ib) \
+	container_of(__ib, struct ipu6_isys_video_buffer, ib)
+
+#define vb2_buffer_to_ipu6_isys_video_buffer(__vvb) \
+	container_of(__vvb, struct ipu6_isys_video_buffer, vb_v4l2)
+
+#define ipu6_isys_buffer_to_vb2_buffer(__ib) \
+	(&ipu6_isys_to_isys_video_buffer(__ib)->vb_v4l2.vb2_buf)
+
+void ipu6_isys_buffer_list_queue(struct ipu6_isys_buffer_list *bl,
+				 unsigned long op_flags,
+				 enum vb2_buffer_state state);
+void
+ipu6_isys_buf_to_fw_frame_buf(struct ipu6_fw_isys_frame_buff_set_abi *set,
+			      struct ipu6_isys_stream *stream,
+			      struct ipu6_isys_buffer_list *bl);
+void ipu6_isys_queue_buf_ready(struct ipu6_isys_stream *stream,
+			       struct ipu6_fw_isys_resp_info_abi *info);
+int ipu6_isys_queue_init(struct ipu6_isys_queue *aq);
+#endif /* IPU6_ISYS_QUEUE_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-subdev.c

@@ -0,0 +1,389 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bug.h>
+#include <linux/device.h>
+#include <linux/minmax.h>
+
+#include <media/media-entity.h>
+#include <media/mipi-csi2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#include "ipu6-bus.h"
+#include "ipu6-isys.h"
+#include "ipu6-isys-subdev.h"
+
+unsigned int ipu6_isys_mbus_code_to_bpp(u32 code)
+{
+	switch (code) {
+	case MEDIA_BUS_FMT_RGB888_1X24:
+	case MEDIA_BUS_FMT_META_24:
+		return 24;
+	case MEDIA_BUS_FMT_RGB565_1X16:
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_Y16_1X16:
+	case MEDIA_BUS_FMT_META_16:
+		return 16;
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+	case MEDIA_BUS_FMT_Y12_1X12:
+	case MEDIA_BUS_FMT_META_12:
+		return 12;
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
+	case MEDIA_BUS_FMT_Y10_1X10:
+	case MEDIA_BUS_FMT_META_10:
+		return 10;
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_Y8_1X8:
+	case MEDIA_BUS_FMT_META_8:
+		return 8;
+	default:
+		WARN_ON(1);
+		return 8;
+	}
+}
+
+unsigned int ipu6_isys_mbus_code_to_mipi(u32 code)
+{
+	switch (code) {
+	case MEDIA_BUS_FMT_RGB565_1X16:
+		return MIPI_CSI2_DT_RGB565;
+	case MEDIA_BUS_FMT_RGB888_1X24:
+		return MIPI_CSI2_DT_RGB888;
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_YUYV8_1X16:
+		return MIPI_CSI2_DT_YUV422_8B;
+	case MEDIA_BUS_FMT_SBGGR16_1X16:
+	case MEDIA_BUS_FMT_SGBRG16_1X16:
+	case MEDIA_BUS_FMT_SGRBG16_1X16:
+	case MEDIA_BUS_FMT_SRGGB16_1X16:
+	case MEDIA_BUS_FMT_Y16_1X16:
+		return MIPI_CSI2_DT_RAW16;
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+	case MEDIA_BUS_FMT_Y12_1X12:
+		return MIPI_CSI2_DT_RAW12;
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
+	case MEDIA_BUS_FMT_Y10_1X10:
+		return MIPI_CSI2_DT_RAW10;
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_Y8_1X8:
+		return MIPI_CSI2_DT_RAW8;
+	case MEDIA_BUS_FMT_META_8:
+	case MEDIA_BUS_FMT_META_10:
+	case MEDIA_BUS_FMT_META_12:
+	case MEDIA_BUS_FMT_META_16:
+	case MEDIA_BUS_FMT_META_24:
+		return MIPI_CSI2_DT_EMBEDDED_8B;
+	default:
+		/* return unavailable MIPI data type - 0x3f */
+		WARN_ON(1);
+		return 0x3f;
+	}
+}
+
+bool ipu6_isys_is_bayer_format(u32 code)
+{
+	switch (code) {
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+	case MEDIA_BUS_FMT_SRGGB16_1X16:
+	case MEDIA_BUS_FMT_SGRBG16_1X16:
+	case MEDIA_BUS_FMT_SGBRG16_1X16:
+	case MEDIA_BUS_FMT_SBGGR16_1X16:
+		return true;
+	default:
+		return false;
+	}
+}
+
+u32 ipu6_isys_convert_bayer_order(u32 code, int x, int y)
+{
+	static const u32 code_map[] = {
+		MEDIA_BUS_FMT_SRGGB8_1X8,
+		MEDIA_BUS_FMT_SGRBG8_1X8,
+		MEDIA_BUS_FMT_SGBRG8_1X8,
+		MEDIA_BUS_FMT_SBGGR8_1X8,
+		MEDIA_BUS_FMT_SRGGB10_1X10,
+		MEDIA_BUS_FMT_SGRBG10_1X10,
+		MEDIA_BUS_FMT_SGBRG10_1X10,
+		MEDIA_BUS_FMT_SBGGR10_1X10,
+		MEDIA_BUS_FMT_SRGGB12_1X12,
+		MEDIA_BUS_FMT_SGRBG12_1X12,
+		MEDIA_BUS_FMT_SGBRG12_1X12,
+		MEDIA_BUS_FMT_SBGGR12_1X12,
+		MEDIA_BUS_FMT_SRGGB16_1X16,
+		MEDIA_BUS_FMT_SGRBG16_1X16,
+		MEDIA_BUS_FMT_SGBRG16_1X16,
+		MEDIA_BUS_FMT_SBGGR16_1X16,
+	};
+	u32 i;
+
+	for (i = 0; i < ARRAY_SIZE(code_map); i++)
+		if (code_map[i] == code)
+			break;
+
+	if (WARN_ON(i == ARRAY_SIZE(code_map)))
+		return code;
+
+	return code_map[i ^ (((y & 1) << 1) | (x & 1))];
+}
+
+int ipu6_isys_subdev_set_fmt(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state,
+			     struct v4l2_subdev_format *format)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	struct v4l2_mbus_framefmt *fmt;
+	struct v4l2_rect *crop;
+	u32 code = asd->supported_codes[0];
+	u32 other_pad, other_stream;
+	unsigned int i;
+	int ret;
+
+	/* No transcoding, source and sink formats must match. */
+	if ((sd->entity.pads[format->pad].flags & MEDIA_PAD_FL_SOURCE) &&
+	    sd->entity.num_pads > 1)
+		return v4l2_subdev_get_fmt(sd, state, format);
+
+	format->format.width = clamp(format->format.width, IPU6_ISYS_MIN_WIDTH,
+				     IPU6_ISYS_MAX_WIDTH);
+	format->format.height = clamp(format->format.height,
+				      IPU6_ISYS_MIN_HEIGHT,
+				      IPU6_ISYS_MAX_HEIGHT);
+
+	for (i = 0; asd->supported_codes[i]; i++) {
+		if (asd->supported_codes[i] == format->format.code) {
+			code = asd->supported_codes[i];
+			break;
+		}
+	}
+	format->format.code = code;
+	format->format.field = V4L2_FIELD_NONE;
+
+	/* Store the format and propagate it to the source pad. */
+	fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream);
+	if (!fmt)
+		return -EINVAL;
+
+	*fmt = format->format;
+
+	if (!(sd->entity.pads[format->pad].flags & MEDIA_PAD_FL_SINK))
+		return 0;
+
+	/* propagate format to following source pad */
+	fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+							   format->stream);
+	if (!fmt)
+		return -EINVAL;
+
+	*fmt = format->format;
+
+	ret = v4l2_subdev_routing_find_opposite_end(&state->routing,
+						    format->pad,
+						    format->stream,
+						    &other_pad,
+						    &other_stream);
+	if (ret)
+		return -EINVAL;
+
+	crop = v4l2_subdev_state_get_crop(state, other_pad, other_stream);
+	/* reset crop */
+	crop->left = 0;
+	crop->top = 0;
+	crop->width = fmt->width;
+	crop->height = fmt->height;
+
+	return 0;
+}
+
+int ipu6_isys_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_state *state,
+				    struct v4l2_subdev_mbus_code_enum *code)
+{
+	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
+	const u32 *supported_codes = asd->supported_codes;
+	u32 index;
+
+	for (index = 0; supported_codes[index]; index++) {
+		if (index == code->index) {
+			code->code = supported_codes[index];
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int subdev_set_routing(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *state,
+			      struct v4l2_subdev_krouting *routing)
+{
+	static const struct v4l2_mbus_framefmt format = {
+		.width = 4096,
+		.height = 3072,
+		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
+		.field = V4L2_FIELD_NONE,
+	};
+	int ret;
+
+	ret = v4l2_subdev_routing_validate(sd, routing,
+					   V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+	if (ret)
+		return ret;
+
+	return v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
+}
+
+u32 ipu6_isys_get_src_stream_by_src_pad(struct v4l2_subdev *sd, u32 pad)
+{
+	struct v4l2_subdev_state *state;
+	struct v4l2_subdev_route *routes;
+	unsigned int i;
+	u32 source_stream = 0;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+	if (!state)
+		return 0;
+
+	routes = state->routing.routes;
+	for (i = 0; i < state->routing.num_routes; i++) {
+		if (routes[i].source_pad == pad) {
+			source_stream = routes[i].source_stream;
+			break;
+		}
+	}
+
+	v4l2_subdev_unlock_state(state);
+
+	return source_stream;
+}
+
+static int ipu6_isys_subdev_init_state(struct v4l2_subdev *sd,
+				       struct v4l2_subdev_state *state)
+{
+	struct v4l2_subdev_route route = {
+		.sink_pad = 0,
+		.sink_stream = 0,
+		.source_pad = 1,
+		.source_stream = 0,
+		.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+	};
+	struct v4l2_subdev_krouting routing = {
+		.num_routes = 1,
+		.routes = &route,
+	};
+
+	return subdev_set_routing(sd, state, &routing);
+}
+
+int ipu6_isys_subdev_set_routing(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *state,
+				 enum v4l2_subdev_format_whence which,
+				 struct v4l2_subdev_krouting *routing)
+{
+	return subdev_set_routing(sd, state, routing);
+}
+
+static const struct v4l2_subdev_internal_ops ipu6_isys_subdev_internal_ops = {
+	.init_state = ipu6_isys_subdev_init_state,
+};
+
+int ipu6_isys_subdev_init(struct ipu6_isys_subdev *asd,
+			  const struct v4l2_subdev_ops *ops,
+			  unsigned int nr_ctrls,
+			  unsigned int num_sink_pads,
+			  unsigned int num_source_pads)
+{
+	unsigned int num_pads = num_sink_pads + num_source_pads;
+	unsigned int i;
+	int ret;
+
+	v4l2_subdev_init(&asd->sd, ops);
+
+	asd->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+			 V4L2_SUBDEV_FL_HAS_EVENTS |
+			 V4L2_SUBDEV_FL_STREAMS;
+	asd->sd.owner = THIS_MODULE;
+	asd->sd.dev = &asd->isys->adev->auxdev.dev;
+	asd->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+	asd->sd.internal_ops = &ipu6_isys_subdev_internal_ops;
+
+	asd->pad = devm_kcalloc(&asd->isys->adev->auxdev.dev, num_pads,
+				sizeof(*asd->pad), GFP_KERNEL);
+	if (!asd->pad)
+		return -ENOMEM;
+
+	for (i = 0; i < num_sink_pads; i++)
+		asd->pad[i].flags = MEDIA_PAD_FL_SINK |
+				    MEDIA_PAD_FL_MUST_CONNECT;
+
+	for (i = num_sink_pads; i < num_pads; i++)
+		asd->pad[i].flags = MEDIA_PAD_FL_SOURCE;
+
+	ret = media_entity_pads_init(&asd->sd.entity, num_pads, asd->pad);
+	if (ret)
+		return ret;
+
+	if (asd->ctrl_init) {
+		ret = v4l2_ctrl_handler_init(&asd->ctrl_handler, nr_ctrls);
+		if (ret)
+			goto out_media_entity_cleanup;
+
+		asd->ctrl_init(&asd->sd);
+		if (asd->ctrl_handler.error) {
+			ret = asd->ctrl_handler.error;
+			goto out_v4l2_ctrl_handler_free;
+		}
+
+		asd->sd.ctrl_handler = &asd->ctrl_handler;
+	}
+
+	asd->source = -1;
+
+	return 0;
+
+out_v4l2_ctrl_handler_free:
+	v4l2_ctrl_handler_free(&asd->ctrl_handler);
+
+out_media_entity_cleanup:
+	media_entity_cleanup(&asd->sd.entity);
+
+	return ret;
+}
+
+void ipu6_isys_subdev_cleanup(struct ipu6_isys_subdev *asd)
+{
+	media_entity_cleanup(&asd->sd.entity);
+	v4l2_ctrl_handler_free(&asd->ctrl_handler);
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-subdev.h

@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_ISYS_SUBDEV_H
+#define IPU6_ISYS_SUBDEV_H
+
+#include <linux/container_of.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+struct ipu6_isys;
+
+struct ipu6_isys_subdev {
+	struct v4l2_subdev sd;
+	struct ipu6_isys *isys;
+	u32 const *supported_codes;
+	struct media_pad *pad;
+	struct v4l2_ctrl_handler ctrl_handler;
+	void (*ctrl_init)(struct v4l2_subdev *sd);
+	int source;	/* SSI stream source; -1 if unset */
+};
+
+#define to_ipu6_isys_subdev(__sd) \
+	container_of(__sd, struct ipu6_isys_subdev, sd)
+
+unsigned int ipu6_isys_mbus_code_to_bpp(u32 code);
+unsigned int ipu6_isys_mbus_code_to_mipi(u32 code);
+bool ipu6_isys_is_bayer_format(u32 code);
+u32 ipu6_isys_convert_bayer_order(u32 code, int x, int y);
+
+int ipu6_isys_subdev_set_fmt(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state,
+			     struct v4l2_subdev_format *fmt);
+int ipu6_isys_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_state *state,
+				    struct v4l2_subdev_mbus_code_enum
+				    *code);
+u32 ipu6_isys_get_src_stream_by_src_pad(struct v4l2_subdev *sd, u32 pad);
+int ipu6_isys_subdev_set_routing(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *state,
+				 enum v4l2_subdev_format_whence which,
+				 struct v4l2_subdev_krouting *routing);
+int ipu6_isys_subdev_init(struct ipu6_isys_subdev *asd,
+			  const struct v4l2_subdev_ops *ops,
+			  unsigned int nr_ctrls,
+			  unsigned int num_sink_pads,
+			  unsigned int num_source_pads);
+void ipu6_isys_subdev_cleanup(struct ipu6_isys_subdev *asd);
+#endif /* IPU6_ISYS_SUBDEV_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys-video.h

@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_ISYS_VIDEO_H
+#define IPU6_ISYS_VIDEO_H
+
+#include <linux/atomic.h>
+#include <linux/completion.h>
+#include <linux/container_of.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-dev.h>
+
+#include "ipu6-isys-queue.h"
+
+#define IPU6_ISYS_OUTPUT_PINS 11
+#define IPU6_ISYS_MAX_PARALLEL_SOF 2
+
+struct file;
+struct ipu6_isys;
+struct ipu6_isys_csi2;
+struct ipu6_isys_subdev;
+
+struct ipu6_isys_pixelformat {
+	u32 pixelformat;
+	u32 bpp;
+	u32 bpp_packed;
+	u32 code;
+	u32 css_pixelformat;
+	bool is_meta;
+};
+
+struct sequence_info {
+	unsigned int sequence;
+	u64 timestamp;
+};
+
+/*
+ * Align with firmware stream. Each stream represents a CSI virtual channel.
+ * May map to multiple video devices
+ */
+struct ipu6_isys_stream {
+	struct mutex mutex;
+	atomic_t sequence;
+	unsigned int seq_index;
+	struct sequence_info seq[IPU6_ISYS_MAX_PARALLEL_SOF];
+	int stream_source;
+	int stream_handle;
+	unsigned int nr_output_pins;
+	struct ipu6_isys_subdev *asd;
+
+	int nr_queues;	/* Number of capture queues */
+	int nr_streaming;
+	int streaming;	/* Has streaming been really started? */
+	struct list_head queues;
+	struct completion stream_open_completion;
+	struct completion stream_close_completion;
+	struct completion stream_start_completion;
+	struct completion stream_stop_completion;
+	struct ipu6_isys *isys;
+
+	struct ipu6_isys_queue *output_pins_queue[IPU6_ISYS_OUTPUT_PINS];
+	int error;
+	u8 vc;
+};
+
+struct video_stream_watermark {
+	u32 width;
+	u32 height;
+	u32 hblank;
+	u32 frame_rate;
+	u64 pixel_rate;
+	u64 stream_data_rate;
+	u16 sram_gran_shift;
+	u16 sram_gran_size;
+	struct list_head stream_node;
+};
+
+struct ipu6_isys_video {
+	struct ipu6_isys_queue aq;
+	/* Serialise access to other fields in the struct. */
+	struct mutex mutex;
+	struct media_pad pad;
+	struct video_device vdev;
+	struct v4l2_pix_format pix_fmt;
+	struct v4l2_meta_format meta_fmt;
+	struct ipu6_isys *isys;
+	struct ipu6_isys_csi2 *csi2;
+	struct ipu6_isys_stream *stream;
+	unsigned int streaming;
+	struct video_stream_watermark watermark;
+	u32 source_stream;
+	u8 vc;
+	u8 dt;
+};
+
+#define ipu6_isys_queue_to_video(__aq) \
+	container_of(__aq, struct ipu6_isys_video, aq)
+
+extern const struct ipu6_isys_pixelformat ipu6_isys_pfmts[];
+extern const struct ipu6_isys_pixelformat ipu6_isys_pfmts_packed[];
+
+const struct ipu6_isys_pixelformat *
+ipu6_isys_get_isys_format(u32 pixelformat, u32 code);
+int ipu6_isys_video_prepare_stream(struct ipu6_isys_video *av,
+				   struct media_entity *source_entity,
+				   int nr_queues);
+int ipu6_isys_video_set_streaming(struct ipu6_isys_video *av, int state,
+				  struct ipu6_isys_buffer_list *bl);
+int ipu6_isys_fw_open(struct ipu6_isys *isys);
+void ipu6_isys_fw_close(struct ipu6_isys *isys);
+int ipu6_isys_setup_video(struct ipu6_isys_video *av,
+			  struct media_pad *remote_pad,
+			  struct media_pad *source_pad, int *nr_queues);
+int ipu6_isys_video_init(struct ipu6_isys_video *av);
+void ipu6_isys_video_cleanup(struct ipu6_isys_video *av);
+void ipu6_isys_put_stream(struct ipu6_isys_stream *stream);
+struct ipu6_isys_stream *
+ipu6_isys_query_stream_by_handle(struct ipu6_isys *isys, u8 stream_handle);
+struct ipu6_isys_stream *
+ipu6_isys_query_stream_by_source(struct ipu6_isys *isys, int source, u8 vc);
+
+void ipu6_isys_configure_stream_watermark(struct ipu6_isys_video *av,
+					  struct media_entity *source);
+void ipu6_isys_update_stream_watermark(struct ipu6_isys_video *av, bool state);
+
+u32 ipu6_isys_get_format(struct ipu6_isys_video *av);
+u32 ipu6_isys_get_data_size(struct ipu6_isys_video *av);
+u32 ipu6_isys_get_bytes_per_line(struct ipu6_isys_video *av);
+u32 ipu6_isys_get_frame_width(struct ipu6_isys_video *av);
+u32 ipu6_isys_get_frame_height(struct ipu6_isys_video *av);
+
+#endif /* IPU6_ISYS_VIDEO_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-isys.h

@@ -0,0 +1,200 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_ISYS_H
+#define IPU6_ISYS_H
+
+#include <linux/irqreturn.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/pm_qos.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+
+#include <media/media-device.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-device.h>
+
+#include "ipu6.h"
+#include "ipu6-fw-isys.h"
+#include "ipu6-isys-csi2.h"
+#include "ipu6-isys-video.h"
+
+struct ipu6_bus_device;
+
+#define IPU6_ISYS_ENTITY_PREFIX		"Intel IPU6"
+/* FW support max 16 streams */
+#define IPU6_ISYS_MAX_STREAMS		16
+#define ISYS_UNISPART_IRQS	(IPU6_ISYS_UNISPART_IRQ_SW |	\
+				 IPU6_ISYS_UNISPART_IRQ_CSI0 |	\
+				 IPU6_ISYS_UNISPART_IRQ_CSI1)
+
+/*
+ * Current message queue configuration. These must be big enough
+ * so that they never gets full. Queues are located in system memory
+ */
+#define IPU6_ISYS_SIZE_RECV_QUEUE 40
+#define IPU6_ISYS_SIZE_SEND_QUEUE 40
+#define IPU6_ISYS_SIZE_PROXY_RECV_QUEUE 5
+#define IPU6_ISYS_SIZE_PROXY_SEND_QUEUE 5
+#define IPU6_ISYS_NUM_RECV_QUEUE 1
+
+#define IPU6_ISYS_MIN_WIDTH		2U
+#define IPU6_ISYS_MIN_HEIGHT		1U
+#define IPU6_ISYS_MAX_WIDTH		4672U
+#define IPU6_ISYS_MAX_HEIGHT		3416U
+
+/* the threshold granularity is 2KB on IPU6 */
+#define IPU6_SRAM_GRANULARITY_SHIFT	11
+#define IPU6_SRAM_GRANULARITY_SIZE	2048
+/* the threshold granularity is 1KB on IPU6SE */
+#define IPU6SE_SRAM_GRANULARITY_SHIFT	10
+#define IPU6SE_SRAM_GRANULARITY_SIZE	1024
+/* IS pixel buffer is 256KB, MaxSRAMSize is 200KB on IPU6 */
+#define IPU6_MAX_SRAM_SIZE			(200 << 10)
+/* IS pixel buffer is 128KB, MaxSRAMSize is 96KB on IPU6SE */
+#define IPU6SE_MAX_SRAM_SIZE			(96 << 10)
+
+#define IPU6EP_LTR_VALUE			200
+#define IPU6EP_MIN_MEMOPEN_TH			0x4
+#define IPU6EP_MTL_LTR_VALUE			1023
+#define IPU6EP_MTL_MIN_MEMOPEN_TH		0xc
+
+struct ltr_did {
+	union {
+		u32 value;
+		struct {
+			u8 val0;
+			u8 val1;
+			u8 val2;
+			u8 val3;
+		} bits;
+	} lut_ltr;
+	union {
+		u32 value;
+		struct {
+			u8 th0;
+			u8 th1;
+			u8 th2;
+			u8 th3;
+		} bits;
+	} lut_fill_time;
+};
+
+struct isys_iwake_watermark {
+	bool iwake_enabled;
+	bool force_iwake_disable;
+	u32 iwake_threshold;
+	u64 isys_pixelbuffer_datarate;
+	struct ltr_did ltrdid;
+	struct mutex mutex; /* protect whole struct */
+	struct ipu6_isys *isys;
+	struct list_head video_list;
+};
+
+struct ipu6_isys_csi2_config {
+	u32 nlanes;
+	u32 port;
+};
+
+struct sensor_async_sd {
+	struct v4l2_async_connection asc;
+	struct ipu6_isys_csi2_config csi2;
+};
+
+/*
+ * struct ipu6_isys
+ *
+ * @media_dev: Media device
+ * @v4l2_dev: V4L2 device
+ * @adev: ISYS bus device
+ * @power: Is ISYS powered on or not?
+ * @isr_bits: Which bits does the ISR handle?
+ * @power_lock: Serialise access to power (power state in general)
+ * @csi2_rx_ctrl_cached: cached shared value between all CSI2 receivers
+ * @streams_lock: serialise access to streams
+ * @streams: streams per firmware stream ID
+ * @fwcom: fw communication layer private pointer
+ *         or optional external library private pointer
+ * @phy_termcal_val: the termination calibration value, only used for DWC PHY
+ * @need_reset: Isys requires d0i0->i3 transition
+ * @ref_count: total number of callers fw open
+ * @mutex: serialise access isys video open/release related operations
+ * @stream_mutex: serialise stream start and stop, queueing requests
+ * @pdata: platform data pointer
+ * @csi2: CSI-2 receivers
+ */
+struct ipu6_isys {
+	struct media_device media_dev;
+	struct v4l2_device v4l2_dev;
+	struct ipu6_bus_device *adev;
+
+	int power;
+	spinlock_t power_lock;
+	u32 isr_csi2_bits;
+	u32 csi2_rx_ctrl_cached;
+	spinlock_t streams_lock;
+	struct ipu6_isys_stream streams[IPU6_ISYS_MAX_STREAMS];
+	int streams_ref_count[IPU6_ISYS_MAX_STREAMS];
+	void *fwcom;
+	u32 phy_termcal_val;
+	bool need_reset;
+	bool icache_prefetch;
+	bool csi2_cse_ipc_not_supported;
+	unsigned int ref_count;
+	unsigned int stream_opened;
+	unsigned int sensor_type;
+
+	struct mutex mutex;
+	struct mutex stream_mutex;
+
+	struct ipu6_isys_pdata *pdata;
+
+	int (*phy_set_power)(struct ipu6_isys *isys,
+			     struct ipu6_isys_csi2_config *cfg,
+			     const struct ipu6_isys_csi2_timing *timing,
+			     bool on);
+
+	struct ipu6_isys_csi2 *csi2;
+
+	struct pm_qos_request pm_qos;
+	spinlock_t listlock;	/* Protect framebuflist */
+	struct list_head framebuflist;
+	struct list_head framebuflist_fw;
+	struct v4l2_async_notifier notifier;
+	struct isys_iwake_watermark iwake_watermark;
+};
+
+struct isys_fw_msgs {
+	union {
+		u64 dummy;
+		struct ipu6_fw_isys_frame_buff_set_abi frame;
+		struct ipu6_fw_isys_stream_cfg_data_abi stream;
+	} fw_msg;
+	struct list_head head;
+	dma_addr_t dma_addr;
+};
+
+struct isys_fw_msgs *ipu6_get_fw_msg_buf(struct ipu6_isys_stream *stream);
+void ipu6_put_fw_msg_buf(struct ipu6_isys *isys, uintptr_t data);
+void ipu6_cleanup_fw_msg_bufs(struct ipu6_isys *isys);
+
+extern const struct v4l2_ioctl_ops ipu6_isys_ioctl_ops;
+
+void update_watermark_setting(struct ipu6_isys *isys);
+
+int ipu6_isys_mcd_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on);
+
+int ipu6_isys_dwc_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on);
+
+int ipu6_isys_jsl_phy_set_power(struct ipu6_isys *isys,
+				struct ipu6_isys_csi2_config *cfg,
+				const struct ipu6_isys_csi2_timing *timing,
+				bool on);
+#endif /* IPU6_ISYS_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-mmu.c

@@ -0,0 +1,806 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+#include <asm/barrier.h>
+
+#include <linux/align.h>
+#include <linux/atomic.h>
+#include <linux/bitops.h>
+#include <linux/bits.h>
+#include <linux/bug.h>
+#include <linux/cacheflush.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/io.h>
+#include <linux/iova.h>
+#include <linux/math.h>
+#include <linux/minmax.h>
+#include <linux/mm.h>
+#include <linux/pfn.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/vmalloc.h>
+
+#include "ipu6.h"
+#include "ipu6-dma.h"
+#include "ipu6-mmu.h"
+#include "ipu6-platform-regs.h"
+
+#define ISP_PAGE_SHIFT		12
+#define ISP_PAGE_SIZE		BIT(ISP_PAGE_SHIFT)
+#define ISP_PAGE_MASK		(~(ISP_PAGE_SIZE - 1))
+
+#define ISP_L1PT_SHIFT		22
+#define ISP_L1PT_MASK		(~((1U << ISP_L1PT_SHIFT) - 1))
+
+#define ISP_L2PT_SHIFT		12
+#define ISP_L2PT_MASK		(~(ISP_L1PT_MASK | (~(ISP_PAGE_MASK))))
+
+#define ISP_L1PT_PTES           1024
+#define ISP_L2PT_PTES           1024
+
+#define ISP_PADDR_SHIFT		12
+
+#define REG_TLB_INVALIDATE	0x0000
+
+#define REG_L1_PHYS		0x0004	/* 27-bit pfn */
+#define REG_INFO		0x0008
+
+#define TBL_PHYS_ADDR(a)	((phys_addr_t)(a) << ISP_PADDR_SHIFT)
+
+static void tlb_invalidate(struct ipu6_mmu *mmu)
+{
+	unsigned long flags;
+	unsigned int i;
+
+	spin_lock_irqsave(&mmu->ready_lock, flags);
+	if (!mmu->ready) {
+		spin_unlock_irqrestore(&mmu->ready_lock, flags);
+		return;
+	}
+
+	for (i = 0; i < mmu->nr_mmus; i++) {
+		/*
+		 * To avoid the HW bug induced dead lock in some of the IPU6
+		 * MMUs on successive invalidate calls, we need to first do a
+		 * read to the page table base before writing the invalidate
+		 * register. MMUs which need to implement this WA, will have
+		 * the insert_read_before_invalidate flags set as true.
+		 * Disregard the return value of the read.
+		 */
+		if (mmu->mmu_hw[i].insert_read_before_invalidate)
+			readl(mmu->mmu_hw[i].base + REG_L1_PHYS);
+
+		writel(0xffffffff, mmu->mmu_hw[i].base +
+		       REG_TLB_INVALIDATE);
+		/*
+		 * The TLB invalidation is a "single cycle" (IOMMU clock cycles)
+		 * When the actual MMIO write reaches the IPU6 TLB Invalidate
+		 * register, wmb() will force the TLB invalidate out if the CPU
+		 * attempts to update the IOMMU page table (or sooner).
+		 */
+		wmb();
+	}
+	spin_unlock_irqrestore(&mmu->ready_lock, flags);
+}
+
+#ifdef DEBUG
+static void page_table_dump(struct ipu6_mmu_info *mmu_info)
+{
+	u32 l1_idx;
+
+	dev_dbg(mmu_info->dev, "begin IOMMU page table dump\n");
+
+	for (l1_idx = 0; l1_idx < ISP_L1PT_PTES; l1_idx++) {
+		u32 l2_idx;
+		u32 iova = (phys_addr_t)l1_idx << ISP_L1PT_SHIFT;
+		phys_addr_t l2_phys;
+
+		if (mmu_info->l1_pt[l1_idx] == mmu_info->dummy_l2_pteval)
+			continue;
+
+		l2_phys = TBL_PHYS_ADDR(mmu_info->l1_pt[l1_idx]);
+		dev_dbg(mmu_info->dev,
+			"l1 entry %u; iovas 0x%8.8x-0x%8.8x, at %pap\n",
+			l1_idx, iova, iova + ISP_PAGE_SIZE, &l2_phys);
+
+		for (l2_idx = 0; l2_idx < ISP_L2PT_PTES; l2_idx++) {
+			u32 *l2_pt = mmu_info->l2_pts[l1_idx];
+			u32 iova2 = iova + (l2_idx << ISP_L2PT_SHIFT);
+
+			if (l2_pt[l2_idx] == mmu_info->dummy_page_pteval)
+				continue;
+
+			dev_dbg(mmu_info->dev,
+				"\tl2 entry %u; iova 0x%8.8x, phys %pa\n",
+				l2_idx, iova2,
+				TBL_PHYS_ADDR(l2_pt[l2_idx]));
+		}
+	}
+
+	dev_dbg(mmu_info->dev, "end IOMMU page table dump\n");
+}
+#endif /* DEBUG */
+
+static dma_addr_t map_single(struct ipu6_mmu_info *mmu_info, void *ptr)
+{
+	dma_addr_t dma;
+
+	dma = dma_map_single(mmu_info->dev, ptr, PAGE_SIZE, DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(mmu_info->dev, dma))
+		return 0;
+
+	return dma;
+}
+
+static int get_dummy_page(struct ipu6_mmu_info *mmu_info)
+{
+	void *pt = (void *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
+	dma_addr_t dma;
+
+	if (!pt)
+		return -ENOMEM;
+
+	dev_dbg(mmu_info->dev, "dummy_page: get_zeroed_page() == %p\n", pt);
+
+	dma = map_single(mmu_info, pt);
+	if (!dma) {
+		dev_err(mmu_info->dev, "Failed to map dummy page\n");
+		goto err_free_page;
+	}
+
+	mmu_info->dummy_page = pt;
+	mmu_info->dummy_page_pteval = dma >> ISP_PAGE_SHIFT;
+
+	return 0;
+
+err_free_page:
+	free_page((unsigned long)pt);
+	return -ENOMEM;
+}
+
+static void free_dummy_page(struct ipu6_mmu_info *mmu_info)
+{
+	dma_unmap_single(mmu_info->dev,
+			 TBL_PHYS_ADDR(mmu_info->dummy_page_pteval),
+			 PAGE_SIZE, DMA_BIDIRECTIONAL);
+	free_page((unsigned long)mmu_info->dummy_page);
+}
+
+static int alloc_dummy_l2_pt(struct ipu6_mmu_info *mmu_info)
+{
+	u32 *pt = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
+	dma_addr_t dma;
+	unsigned int i;
+
+	if (!pt)
+		return -ENOMEM;
+
+	dev_dbg(mmu_info->dev, "dummy_l2: get_zeroed_page() = %p\n", pt);
+
+	dma = map_single(mmu_info, pt);
+	if (!dma) {
+		dev_err(mmu_info->dev, "Failed to map l2pt page\n");
+		goto err_free_page;
+	}
+
+	for (i = 0; i < ISP_L2PT_PTES; i++)
+		pt[i] = mmu_info->dummy_page_pteval;
+
+	mmu_info->dummy_l2_pt = pt;
+	mmu_info->dummy_l2_pteval = dma >> ISP_PAGE_SHIFT;
+
+	return 0;
+
+err_free_page:
+	free_page((unsigned long)pt);
+	return -ENOMEM;
+}
+
+static void free_dummy_l2_pt(struct ipu6_mmu_info *mmu_info)
+{
+	dma_unmap_single(mmu_info->dev,
+			 TBL_PHYS_ADDR(mmu_info->dummy_l2_pteval),
+			 PAGE_SIZE, DMA_BIDIRECTIONAL);
+	free_page((unsigned long)mmu_info->dummy_l2_pt);
+}
+
+static u32 *alloc_l1_pt(struct ipu6_mmu_info *mmu_info)
+{
+	u32 *pt = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
+	dma_addr_t dma;
+	unsigned int i;
+
+	if (!pt)
+		return NULL;
+
+	dev_dbg(mmu_info->dev, "alloc_l1: get_zeroed_page() = %p\n", pt);
+
+	for (i = 0; i < ISP_L1PT_PTES; i++)
+		pt[i] = mmu_info->dummy_l2_pteval;
+
+	dma = map_single(mmu_info, pt);
+	if (!dma) {
+		dev_err(mmu_info->dev, "Failed to map l1pt page\n");
+		goto err_free_page;
+	}
+
+	mmu_info->l1_pt_dma = dma >> ISP_PADDR_SHIFT;
+	dev_dbg(mmu_info->dev, "l1 pt %p mapped at %pad\n", pt, &dma);
+
+	return pt;
+
+err_free_page:
+	free_page((unsigned long)pt);
+	return NULL;
+}
+
+static u32 *alloc_l2_pt(struct ipu6_mmu_info *mmu_info)
+{
+	u32 *pt = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
+	unsigned int i;
+
+	if (!pt)
+		return NULL;
+
+	dev_dbg(mmu_info->dev, "alloc_l2: get_zeroed_page() = %p\n", pt);
+
+	for (i = 0; i < ISP_L2PT_PTES; i++)
+		pt[i] = mmu_info->dummy_page_pteval;
+
+	return pt;
+}
+
+static void l2_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		     phys_addr_t dummy, size_t size)
+{
+	unsigned int l2_entries;
+	unsigned int l2_idx;
+	unsigned long flags;
+	u32 l1_idx;
+	u32 *l2_pt;
+
+	spin_lock_irqsave(&mmu_info->lock, flags);
+	for (l1_idx = iova >> ISP_L1PT_SHIFT;
+	     size > 0 && l1_idx < ISP_L1PT_PTES; l1_idx++) {
+		dev_dbg(mmu_info->dev,
+			"unmapping l2 pgtable (l1 index %u (iova 0x%8.8lx))\n",
+			l1_idx, iova);
+
+		if (mmu_info->l1_pt[l1_idx] == mmu_info->dummy_l2_pteval) {
+			dev_err(mmu_info->dev,
+				"unmap not mapped iova 0x%8.8lx l1 index %u\n",
+				iova, l1_idx);
+			continue;
+		}
+		l2_pt = mmu_info->l2_pts[l1_idx];
+
+		l2_entries = 0;
+		for (l2_idx = (iova & ISP_L2PT_MASK) >> ISP_L2PT_SHIFT;
+		     size > 0 && l2_idx < ISP_L2PT_PTES; l2_idx++) {
+			phys_addr_t pteval = TBL_PHYS_ADDR(l2_pt[l2_idx]);
+
+			dev_dbg(mmu_info->dev,
+				"unmap l2 index %u with pteval 0x%p\n",
+				l2_idx, &pteval);
+			l2_pt[l2_idx] = mmu_info->dummy_page_pteval;
+
+			iova += ISP_PAGE_SIZE;
+			size -= ISP_PAGE_SIZE;
+
+			l2_entries++;
+		}
+
+		WARN_ON_ONCE(!l2_entries);
+		clflush_cache_range(&l2_pt[l2_idx - l2_entries],
+				    sizeof(l2_pt[0]) * l2_entries);
+	}
+
+	WARN_ON_ONCE(size);
+	spin_unlock_irqrestore(&mmu_info->lock, flags);
+}
+
+static int l2_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		  phys_addr_t paddr, size_t size)
+{
+	struct device *dev = mmu_info->dev;
+	unsigned int l2_entries;
+	u32 *l2_pt, *l2_virt;
+	unsigned int l2_idx;
+	unsigned long flags;
+	size_t mapped = 0;
+	dma_addr_t dma;
+	u32 l1_entry;
+	u32 l1_idx;
+	int err = 0;
+
+	spin_lock_irqsave(&mmu_info->lock, flags);
+
+	paddr = ALIGN(paddr, ISP_PAGE_SIZE);
+	for (l1_idx = iova >> ISP_L1PT_SHIFT;
+	     size > 0 && l1_idx < ISP_L1PT_PTES; l1_idx++) {
+		dev_dbg(dev,
+			"mapping l2 page table for l1 index %u (iova %8.8x)\n",
+			l1_idx, (u32)iova);
+
+		l1_entry = mmu_info->l1_pt[l1_idx];
+		if (l1_entry == mmu_info->dummy_l2_pteval) {
+			l2_virt = mmu_info->l2_pts[l1_idx];
+			if (likely(!l2_virt)) {
+				l2_virt = alloc_l2_pt(mmu_info);
+				if (!l2_virt) {
+					err = -ENOMEM;
+					goto error;
+				}
+			}
+
+			dma = map_single(mmu_info, l2_virt);
+			if (!dma) {
+				dev_err(dev, "Failed to map l2pt page\n");
+				free_page((unsigned long)l2_virt);
+				err = -EINVAL;
+				goto error;
+			}
+
+			l1_entry = dma >> ISP_PADDR_SHIFT;
+
+			dev_dbg(dev, "page for l1_idx %u %p allocated\n",
+				l1_idx, l2_virt);
+			mmu_info->l1_pt[l1_idx] = l1_entry;
+			mmu_info->l2_pts[l1_idx] = l2_virt;
+
+			clflush_cache_range(&mmu_info->l1_pt[l1_idx],
+					    sizeof(mmu_info->l1_pt[l1_idx]));
+		}
+
+		l2_pt = mmu_info->l2_pts[l1_idx];
+		l2_entries = 0;
+
+		for (l2_idx = (iova & ISP_L2PT_MASK) >> ISP_L2PT_SHIFT;
+		     size > 0 && l2_idx < ISP_L2PT_PTES; l2_idx++) {
+			l2_pt[l2_idx] = paddr >> ISP_PADDR_SHIFT;
+
+			dev_dbg(dev, "l2 index %u mapped as 0x%8.8x\n", l2_idx,
+				l2_pt[l2_idx]);
+
+			iova += ISP_PAGE_SIZE;
+			paddr += ISP_PAGE_SIZE;
+			mapped += ISP_PAGE_SIZE;
+			size -= ISP_PAGE_SIZE;
+
+			l2_entries++;
+		}
+
+		WARN_ON_ONCE(!l2_entries);
+		clflush_cache_range(&l2_pt[l2_idx - l2_entries],
+				    sizeof(l2_pt[0]) * l2_entries);
+	}
+
+	spin_unlock_irqrestore(&mmu_info->lock, flags);
+
+	return 0;
+
+error:
+	spin_unlock_irqrestore(&mmu_info->lock, flags);
+	/* unroll mapping in case something went wrong */
+	if (mapped)
+		l2_unmap(mmu_info, iova - mapped, paddr - mapped, mapped);
+
+	return err;
+}
+
+static int __ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+			  phys_addr_t paddr, size_t size)
+{
+	u32 iova_start = round_down(iova, ISP_PAGE_SIZE);
+	u32 iova_end = ALIGN(iova + size, ISP_PAGE_SIZE);
+
+	dev_dbg(mmu_info->dev,
+		"mapping iova 0x%8.8x--0x%8.8x, size %zu at paddr %pap\n",
+		iova_start, iova_end, size, &paddr);
+
+	return l2_map(mmu_info, iova_start, paddr, size);
+}
+
+static void __ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info,
+			     unsigned long iova, size_t size)
+{
+	l2_unmap(mmu_info, iova, 0, size);
+}
+
+static int allocate_trash_buffer(struct ipu6_mmu *mmu)
+{
+	unsigned int n_pages = PFN_UP(IPU6_MMUV2_TRASH_RANGE);
+	struct iova *iova;
+	unsigned int i;
+	dma_addr_t dma;
+	unsigned long iova_addr;
+	int ret;
+
+	/* Allocate 8MB in iova range */
+	iova = alloc_iova(&mmu->dmap->iovad, n_pages,
+			  PHYS_PFN(mmu->dmap->mmu_info->aperture_end), 0);
+	if (!iova) {
+		dev_err(mmu->dev, "cannot allocate iova range for trash\n");
+		return -ENOMEM;
+	}
+
+	dma = dma_map_page(mmu->dmap->mmu_info->dev, mmu->trash_page, 0,
+			   PAGE_SIZE, DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(mmu->dmap->mmu_info->dev, dma)) {
+		dev_err(mmu->dmap->mmu_info->dev, "Failed to map trash page\n");
+		ret = -ENOMEM;
+		goto out_free_iova;
+	}
+
+	mmu->pci_trash_page = dma;
+
+	/*
+	 * Map the 8MB iova address range to the same physical trash page
+	 * mmu->trash_page which is already reserved at the probe
+	 */
+	iova_addr = iova->pfn_lo;
+	for (i = 0; i < n_pages; i++) {
+		ret = ipu6_mmu_map(mmu->dmap->mmu_info, PFN_PHYS(iova_addr),
+				   mmu->pci_trash_page, PAGE_SIZE);
+		if (ret) {
+			dev_err(mmu->dev,
+				"mapping trash buffer range failed\n");
+			goto out_unmap;
+		}
+
+		iova_addr++;
+	}
+
+	mmu->iova_trash_page = PFN_PHYS(iova->pfn_lo);
+	dev_dbg(mmu->dev, "iova trash buffer for MMUID: %d is %u\n",
+		mmu->mmid, (unsigned int)mmu->iova_trash_page);
+	return 0;
+
+out_unmap:
+	ipu6_mmu_unmap(mmu->dmap->mmu_info, PFN_PHYS(iova->pfn_lo),
+		       PFN_PHYS(iova_size(iova)));
+	dma_unmap_page(mmu->dmap->mmu_info->dev, mmu->pci_trash_page,
+		       PAGE_SIZE, DMA_BIDIRECTIONAL);
+out_free_iova:
+	__free_iova(&mmu->dmap->iovad, iova);
+	return ret;
+}
+
+int ipu6_mmu_hw_init(struct ipu6_mmu *mmu)
+{
+	struct ipu6_mmu_info *mmu_info;
+	unsigned long flags;
+	unsigned int i;
+
+	mmu_info = mmu->dmap->mmu_info;
+
+	/* Initialise the each MMU HW block */
+	for (i = 0; i < mmu->nr_mmus; i++) {
+		struct ipu6_mmu_hw *mmu_hw = &mmu->mmu_hw[i];
+		unsigned int j;
+		u16 block_addr;
+
+		/* Write page table address per MMU */
+		writel((phys_addr_t)mmu_info->l1_pt_dma,
+		       mmu->mmu_hw[i].base + REG_L1_PHYS);
+
+		/* Set info bits per MMU */
+		writel(mmu->mmu_hw[i].info_bits,
+		       mmu->mmu_hw[i].base + REG_INFO);
+
+		/* Configure MMU TLB stream configuration for L1 */
+		for (j = 0, block_addr = 0; j < mmu_hw->nr_l1streams;
+		     block_addr += mmu->mmu_hw[i].l1_block_sz[j], j++) {
+			if (block_addr > IPU6_MAX_LI_BLOCK_ADDR) {
+				dev_err(mmu->dev, "invalid L1 configuration\n");
+				return -EINVAL;
+			}
+
+			/* Write block start address for each streams */
+			writel(block_addr, mmu_hw->base +
+			       mmu_hw->l1_stream_id_reg_offset + 4 * j);
+		}
+
+		/* Configure MMU TLB stream configuration for L2 */
+		for (j = 0, block_addr = 0; j < mmu_hw->nr_l2streams;
+		     block_addr += mmu->mmu_hw[i].l2_block_sz[j], j++) {
+			if (block_addr > IPU6_MAX_L2_BLOCK_ADDR) {
+				dev_err(mmu->dev, "invalid L2 configuration\n");
+				return -EINVAL;
+			}
+
+			writel(block_addr, mmu_hw->base +
+			       mmu_hw->l2_stream_id_reg_offset + 4 * j);
+		}
+	}
+
+	if (!mmu->trash_page) {
+		int ret;
+
+		mmu->trash_page = alloc_page(GFP_KERNEL);
+		if (!mmu->trash_page) {
+			dev_err(mmu->dev, "insufficient memory for trash buffer\n");
+			return -ENOMEM;
+		}
+
+		ret = allocate_trash_buffer(mmu);
+		if (ret) {
+			__free_page(mmu->trash_page);
+			mmu->trash_page = NULL;
+			dev_err(mmu->dev, "trash buffer allocation failed\n");
+			return ret;
+		}
+	}
+
+	spin_lock_irqsave(&mmu->ready_lock, flags);
+	mmu->ready = true;
+	spin_unlock_irqrestore(&mmu->ready_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_mmu_hw_init, "INTEL_IPU6");
+
+static struct ipu6_mmu_info *ipu6_mmu_alloc(struct ipu6_device *isp)
+{
+	struct ipu6_mmu_info *mmu_info;
+	int ret;
+
+	mmu_info = kzalloc_obj(*mmu_info);
+	if (!mmu_info)
+		return NULL;
+
+	mmu_info->aperture_start = 0;
+	mmu_info->aperture_end =
+		(dma_addr_t)DMA_BIT_MASK(isp->secure_mode ?
+					 IPU6_MMU_ADDR_BITS :
+					 IPU6_MMU_ADDR_BITS_NON_SECURE);
+	mmu_info->pgsize_bitmap = SZ_4K;
+	mmu_info->dev = &isp->pdev->dev;
+
+	ret = get_dummy_page(mmu_info);
+	if (ret)
+		goto err_free_info;
+
+	ret = alloc_dummy_l2_pt(mmu_info);
+	if (ret)
+		goto err_free_dummy_page;
+
+	mmu_info->l2_pts = vzalloc(ISP_L2PT_PTES * sizeof(*mmu_info->l2_pts));
+	if (!mmu_info->l2_pts)
+		goto err_free_dummy_l2_pt;
+
+	/*
+	 * We always map the L1 page table (a single page as well as
+	 * the L2 page tables).
+	 */
+	mmu_info->l1_pt = alloc_l1_pt(mmu_info);
+	if (!mmu_info->l1_pt)
+		goto err_free_l2_pts;
+
+	spin_lock_init(&mmu_info->lock);
+
+	dev_dbg(mmu_info->dev, "domain initialised\n");
+
+	return mmu_info;
+
+err_free_l2_pts:
+	vfree(mmu_info->l2_pts);
+err_free_dummy_l2_pt:
+	free_dummy_l2_pt(mmu_info);
+err_free_dummy_page:
+	free_dummy_page(mmu_info);
+err_free_info:
+	kfree(mmu_info);
+
+	return NULL;
+}
+
+void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mmu->ready_lock, flags);
+	mmu->ready = false;
+	spin_unlock_irqrestore(&mmu->ready_lock, flags);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_mmu_hw_cleanup, "INTEL_IPU6");
+
+static struct ipu6_dma_mapping *alloc_dma_mapping(struct ipu6_device *isp)
+{
+	struct ipu6_dma_mapping *dmap;
+
+	dmap = kzalloc_obj(*dmap);
+	if (!dmap)
+		return NULL;
+
+	dmap->mmu_info = ipu6_mmu_alloc(isp);
+	if (!dmap->mmu_info) {
+		kfree(dmap);
+		return NULL;
+	}
+
+	init_iova_domain(&dmap->iovad, SZ_4K, 1);
+	dmap->mmu_info->dmap = dmap;
+
+	dev_dbg(&isp->pdev->dev, "alloc mapping\n");
+
+	iova_cache_get();
+
+	return dmap;
+}
+
+phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
+				  dma_addr_t iova)
+{
+	phys_addr_t phy_addr;
+	unsigned long flags;
+	u32 *l2_pt;
+
+	spin_lock_irqsave(&mmu_info->lock, flags);
+	l2_pt = mmu_info->l2_pts[iova >> ISP_L1PT_SHIFT];
+	phy_addr = (phys_addr_t)l2_pt[(iova & ISP_L2PT_MASK) >> ISP_L2PT_SHIFT];
+	phy_addr <<= ISP_PAGE_SHIFT;
+	spin_unlock_irqrestore(&mmu_info->lock, flags);
+
+	return phy_addr;
+}
+
+void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		    size_t size)
+{
+	unsigned int min_pagesz;
+
+	dev_dbg(mmu_info->dev, "unmapping iova 0x%lx size 0x%zx\n", iova, size);
+
+	/* find out the minimum page size supported */
+	min_pagesz = 1 << __ffs(mmu_info->pgsize_bitmap);
+
+	/*
+	 * The virtual address and the size of the mapping must be
+	 * aligned (at least) to the size of the smallest page supported
+	 * by the hardware
+	 */
+	if (!IS_ALIGNED(iova | size, min_pagesz)) {
+		dev_err(NULL, "unaligned: iova 0x%lx size 0x%zx min_pagesz 0x%x\n",
+			iova, size, min_pagesz);
+		return;
+	}
+
+	__ipu6_mmu_unmap(mmu_info, iova, size);
+}
+
+int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		 phys_addr_t paddr, size_t size)
+{
+	unsigned int min_pagesz;
+
+	if (mmu_info->pgsize_bitmap == 0UL)
+		return -ENODEV;
+
+	/* find out the minimum page size supported */
+	min_pagesz = 1 << __ffs(mmu_info->pgsize_bitmap);
+
+	/*
+	 * both the virtual address and the physical one, as well as
+	 * the size of the mapping, must be aligned (at least) to the
+	 * size of the smallest page supported by the hardware
+	 */
+	if (!IS_ALIGNED(iova | paddr | size, min_pagesz)) {
+		dev_err(mmu_info->dev,
+			"unaligned: iova %lx pa %pa size %zx min_pagesz %x\n",
+			iova, &paddr, size, min_pagesz);
+		return -EINVAL;
+	}
+
+	dev_dbg(mmu_info->dev, "map: iova 0x%lx pa %pa size 0x%zx\n",
+		iova, &paddr, size);
+
+	return __ipu6_mmu_map(mmu_info, iova, paddr, size);
+}
+
+static void ipu6_mmu_destroy(struct ipu6_mmu *mmu)
+{
+	struct ipu6_dma_mapping *dmap = mmu->dmap;
+	struct ipu6_mmu_info *mmu_info = dmap->mmu_info;
+	struct iova *iova;
+	u32 l1_idx;
+
+	if (mmu->iova_trash_page) {
+		iova = find_iova(&dmap->iovad, PHYS_PFN(mmu->iova_trash_page));
+		if (iova) {
+			/* unmap and free the trash buffer iova */
+			ipu6_mmu_unmap(mmu_info, PFN_PHYS(iova->pfn_lo),
+				       PFN_PHYS(iova_size(iova)));
+			__free_iova(&dmap->iovad, iova);
+		} else {
+			dev_err(mmu->dev, "trash buffer iova not found.\n");
+		}
+
+		mmu->iova_trash_page = 0;
+		dma_unmap_page(mmu_info->dev, mmu->pci_trash_page,
+			       PAGE_SIZE, DMA_BIDIRECTIONAL);
+		mmu->pci_trash_page = 0;
+		__free_page(mmu->trash_page);
+	}
+
+	for (l1_idx = 0; l1_idx < ISP_L1PT_PTES; l1_idx++) {
+		if (mmu_info->l1_pt[l1_idx] != mmu_info->dummy_l2_pteval) {
+			dma_unmap_single(mmu_info->dev,
+					 TBL_PHYS_ADDR(mmu_info->l1_pt[l1_idx]),
+					 PAGE_SIZE, DMA_BIDIRECTIONAL);
+			free_page((unsigned long)mmu_info->l2_pts[l1_idx]);
+		}
+	}
+
+	vfree(mmu_info->l2_pts);
+	free_dummy_page(mmu_info);
+	dma_unmap_single(mmu_info->dev, TBL_PHYS_ADDR(mmu_info->l1_pt_dma),
+			 PAGE_SIZE, DMA_BIDIRECTIONAL);
+	free_page((unsigned long)mmu_info->dummy_l2_pt);
+	free_page((unsigned long)mmu_info->l1_pt);
+	kfree(mmu_info);
+}
+
+struct ipu6_mmu *ipu6_mmu_init(struct device *dev,
+			       void __iomem *base, int mmid,
+			       const struct ipu6_hw_variants *hw)
+{
+	struct ipu6_device *isp = pci_get_drvdata(to_pci_dev(dev));
+	struct ipu6_mmu_pdata *pdata;
+	struct ipu6_mmu *mmu;
+	unsigned int i;
+
+	if (hw->nr_mmus > IPU6_MMU_MAX_DEVICES)
+		return ERR_PTR(-EINVAL);
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < hw->nr_mmus; i++) {
+		struct ipu6_mmu_hw *pdata_mmu = &pdata->mmu_hw[i];
+		const struct ipu6_mmu_hw *src_mmu = &hw->mmu_hw[i];
+
+		if (src_mmu->nr_l1streams > IPU6_MMU_MAX_TLB_L1_STREAMS ||
+		    src_mmu->nr_l2streams > IPU6_MMU_MAX_TLB_L2_STREAMS)
+			return ERR_PTR(-EINVAL);
+
+		*pdata_mmu = *src_mmu;
+		pdata_mmu->base = base + src_mmu->offset;
+	}
+
+	mmu = devm_kzalloc(dev, sizeof(*mmu), GFP_KERNEL);
+	if (!mmu)
+		return ERR_PTR(-ENOMEM);
+
+	mmu->mmid = mmid;
+	mmu->mmu_hw = pdata->mmu_hw;
+	mmu->nr_mmus = hw->nr_mmus;
+	mmu->tlb_invalidate = tlb_invalidate;
+	mmu->ready = false;
+	INIT_LIST_HEAD(&mmu->vma_list);
+	spin_lock_init(&mmu->ready_lock);
+
+	mmu->dmap = alloc_dma_mapping(isp);
+	if (!mmu->dmap) {
+		dev_err(dev, "can't alloc dma mapping\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	return mmu;
+}
+
+void ipu6_mmu_cleanup(struct ipu6_mmu *mmu)
+{
+	struct ipu6_dma_mapping *dmap = mmu->dmap;
+
+	ipu6_mmu_destroy(mmu);
+	mmu->dmap = NULL;
+	iova_cache_put();
+	put_iova_domain(&dmap->iovad);
+	kfree(dmap);
+}

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-mmu.h

@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013--2024 Intel Corporation */
+
+#ifndef IPU6_MMU_H
+#define IPU6_MMU_H
+
+#define ISYS_MMID 1
+#define PSYS_MMID 0
+
+#include <linux/list.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+
+struct device;
+struct page;
+struct ipu6_hw_variants;
+
+struct ipu6_mmu_info {
+	struct device *dev;
+
+	u32 *l1_pt;
+	u32 l1_pt_dma;
+	u32 **l2_pts;
+
+	u32 *dummy_l2_pt;
+	u32 dummy_l2_pteval;
+	void *dummy_page;
+	u32 dummy_page_pteval;
+
+	dma_addr_t aperture_start;
+	dma_addr_t aperture_end;
+	unsigned long pgsize_bitmap;
+
+	spinlock_t lock;	/* Serialize access to users */
+	struct ipu6_dma_mapping *dmap;
+};
+
+struct ipu6_mmu {
+	struct list_head node;
+
+	struct ipu6_mmu_hw *mmu_hw;
+	unsigned int nr_mmus;
+	unsigned int mmid;
+
+	phys_addr_t pgtbl;
+	struct device *dev;
+
+	struct ipu6_dma_mapping *dmap;
+	struct list_head vma_list;
+
+	struct page *trash_page;
+	dma_addr_t pci_trash_page; /* IOVA from PCI DMA services (parent) */
+	dma_addr_t iova_trash_page; /* IOVA for IPU6 child nodes to use */
+
+	bool ready;
+	spinlock_t ready_lock;	/* Serialize access to bool ready */
+
+	void (*tlb_invalidate)(struct ipu6_mmu *mmu);
+};
+
+struct ipu6_mmu *ipu6_mmu_init(struct device *dev,
+			       void __iomem *base, int mmid,
+			       const struct ipu6_hw_variants *hw);
+void ipu6_mmu_cleanup(struct ipu6_mmu *mmu);
+int ipu6_mmu_hw_init(struct ipu6_mmu *mmu);
+void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu);
+int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		 phys_addr_t paddr, size_t size);
+void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		    size_t size);
+phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
+				  dma_addr_t iova);
+#endif

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-platform-buttress-regs.h

@@ -0,0 +1,224 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2023--2024 Intel Corporation */
+
+#ifndef IPU6_PLATFORM_BUTTRESS_REGS_H
+#define IPU6_PLATFORM_BUTTRESS_REGS_H
+
+#include <linux/bits.h>
+
+/* IS_WORKPOINT_REQ */
+#define IPU6_BUTTRESS_REG_IS_FREQ_CTL		0x34
+/* PS_WORKPOINT_REQ */
+#define IPU6_BUTTRESS_REG_PS_FREQ_CTL		0x38
+
+/* should be tuned for real silicon */
+#define IPU6_IS_FREQ_CTL_DEFAULT_RATIO		0x08
+#define IPU6SE_IS_FREQ_CTL_DEFAULT_RATIO	0x0a
+#define IPU6_PS_FREQ_CTL_DEFAULT_RATIO		0x0d
+
+#define IPU6_IS_FREQ_CTL_DEFAULT_QOS_FLOOR_RATIO	0x10
+#define IPU6_PS_FREQ_CTL_DEFAULT_QOS_FLOOR_RATIO	0x0708
+
+#define IPU6_BUTTRESS_PWR_STATE_IS_PWR_SHIFT	3
+#define IPU6_BUTTRESS_PWR_STATE_IS_PWR_MASK	GENMASK(4, 3)
+
+#define IPU6_BUTTRESS_PWR_STATE_PS_PWR_SHIFT	6
+#define IPU6_BUTTRESS_PWR_STATE_PS_PWR_MASK	GENMASK(7, 6)
+
+#define IPU6_BUTTRESS_PWR_STATE_DN_DONE		0x0
+#define IPU6_BUTTRESS_PWR_STATE_UP_PROCESS	0x1
+#define IPU6_BUTTRESS_PWR_STATE_DN_PROCESS	0x2
+#define IPU6_BUTTRESS_PWR_STATE_UP_DONE		0x3
+
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_0	0x270
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_1	0x274
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_2	0x278
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_3	0x27c
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_4	0x280
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_5	0x284
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_6	0x288
+#define IPU6_BUTTRESS_REG_FPGA_SUPPORT_7	0x28c
+
+#define BUTTRESS_REG_WDT			0x8
+#define BUTTRESS_REG_BTRS_CTRL			0xc
+#define BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC0	BIT(0)
+#define BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC1	BIT(1)
+#define BUTTRESS_REG_BTRS_CTRL_REF_CLK_IND	GENMASK(9, 8)
+
+#define BUTTRESS_REG_FW_RESET_CTL	0x30
+#define BUTTRESS_FW_RESET_CTL_START	BIT(0)
+#define BUTTRESS_FW_RESET_CTL_DONE	BIT(1)
+
+#define BUTTRESS_REG_IS_FREQ_CTL	0x34
+#define BUTTRESS_REG_PS_FREQ_CTL	0x38
+
+#define BUTTRESS_FREQ_CTL_START		BIT(31)
+#define BUTTRESS_FREQ_CTL_ICCMAX_LEVEL		GENMASK(19, 16)
+#define BUTTRESS_FREQ_CTL_QOS_FLOOR_MASK	GENMASK(15, 8)
+#define BUTTRESS_FREQ_CTL_RATIO_MASK	GENMASK(7, 0)
+
+#define BUTTRESS_REG_PWR_STATE	0x5c
+
+#define BUTTRESS_PWR_STATE_RESET		0x0
+#define BUTTRESS_PWR_STATE_PWR_ON_DONE		0x1
+#define BUTTRESS_PWR_STATE_PWR_RDY		0x3
+#define BUTTRESS_PWR_STATE_PWR_IDLE		0x4
+
+#define BUTTRESS_PWR_STATE_HH_STATUS_MASK	GENMASK(12, 11)
+
+enum {
+	BUTTRESS_PWR_STATE_HH_STATE_IDLE,
+	BUTTRESS_PWR_STATE_HH_STATE_IN_PRGS,
+	BUTTRESS_PWR_STATE_HH_STATE_DONE,
+	BUTTRESS_PWR_STATE_HH_STATE_ERR,
+};
+
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_MASK	GENMASK(23, 19)
+
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_IDLE			0x0
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_PLL_CMP		0x1
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_CLKACK		0x2
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_PG_ACK		0x3
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_RST_ASSRT_CYCLES		0x4
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_STOP_CLK_CYCLES1		0x5
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_STOP_CLK_CYCLES2		0x6
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_RST_DEASSRT_CYCLES	0x7
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_FUSE_WR_CMP	0x8
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_BRK_POINT			0x9
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_IS_RDY			0xa
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_HALT_HALTED		0xb
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_RST_DURATION_CNT3		0xc
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_CLKACK_PD		0xd
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_PD_BRK_POINT		0xe
+#define BUTTRESS_PWR_STATE_IS_PWR_FSM_WAIT_4_PD_PG_ACK0		0xf
+
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_MASK	GENMASK(28, 24)
+
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_IDLE			0x0
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PU_PLL_IP_RDY	0x1
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_RO_PRE_CNT_EXH	0x2
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PU_VGI_PWRGOOD	0x3
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_RO_POST_CNT_EXH	0x4
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WR_PLL_RATIO		0x5
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PU_PLL_CMP		0x6
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PU_CLKACK		0x7
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_RST_ASSRT_CYCLES		0x8
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_STOP_CLK_CYCLES1		0x9
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_STOP_CLK_CYCLES2		0xa
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_RST_DEASSRT_CYCLES	0xb
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_PU_BRK_PNT		0xc
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_FUSE_ACCPT		0xd
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_PS_PWR_UP			0xf
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_4_HALTED		0x10
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_RESET_CNT3		0x11
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PD_CLKACK		0x12
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_PD_OFF_IND		0x13
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_DVFS_PH4		0x14
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_DVFS_PLL_CMP		0x15
+#define BUTTRESS_PWR_STATE_PS_PWR_FSM_WAIT_DVFS_CLKACK		0x16
+
+#define BUTTRESS_REG_SECURITY_CTL	0x300
+#define BUTTRESS_REG_SKU		0x314
+#define BUTTRESS_REG_SECURITY_TOUCH	0x318
+#define BUTTRESS_REG_CAMERA_MASK	0x84
+
+#define BUTTRESS_SECURITY_CTL_FW_SECURE_MODE	BIT(16)
+#define BUTTRESS_SECURITY_CTL_FW_SETUP_MASK	GENMASK(4, 0)
+
+#define BUTTRESS_SECURITY_CTL_FW_SETUP_DONE		BIT(0)
+#define BUTTRESS_SECURITY_CTL_AUTH_DONE			BIT(1)
+#define BUTTRESS_SECURITY_CTL_AUTH_FAILED		BIT(3)
+
+#define BUTTRESS_REG_FW_SOURCE_BASE_LO	0x78
+#define BUTTRESS_REG_FW_SOURCE_BASE_HI	0x7C
+#define BUTTRESS_REG_FW_SOURCE_SIZE	0x80
+
+#define BUTTRESS_REG_ISR_STATUS		0x90
+#define BUTTRESS_REG_ISR_ENABLED_STATUS	0x94
+#define BUTTRESS_REG_ISR_ENABLE		0x98
+#define BUTTRESS_REG_ISR_CLEAR		0x9C
+
+#define BUTTRESS_ISR_IS_IRQ			BIT(0)
+#define BUTTRESS_ISR_PS_IRQ			BIT(1)
+#define BUTTRESS_ISR_IPC_EXEC_DONE_BY_CSE	BIT(2)
+#define BUTTRESS_ISR_IPC_EXEC_DONE_BY_ISH	BIT(3)
+#define BUTTRESS_ISR_IPC_FROM_CSE_IS_WAITING	BIT(4)
+#define BUTTRESS_ISR_IPC_FROM_ISH_IS_WAITING	BIT(5)
+#define BUTTRESS_ISR_CSE_CSR_SET		BIT(6)
+#define BUTTRESS_ISR_ISH_CSR_SET		BIT(7)
+#define BUTTRESS_ISR_SPURIOUS_CMP		BIT(8)
+#define BUTTRESS_ISR_WATCHDOG_EXPIRED		BIT(9)
+#define BUTTRESS_ISR_PUNIT_2_IUNIT_IRQ		BIT(10)
+#define BUTTRESS_ISR_SAI_VIOLATION		BIT(11)
+#define BUTTRESS_ISR_HW_ASSERTION		BIT(12)
+#define BUTTRESS_ISR_IS_CORRECTABLE_MEM_ERR	BIT(13)
+#define BUTTRESS_ISR_IS_FATAL_MEM_ERR		BIT(14)
+#define BUTTRESS_ISR_IS_NON_FATAL_MEM_ERR	BIT(15)
+#define BUTTRESS_ISR_PS_CORRECTABLE_MEM_ERR	BIT(16)
+#define BUTTRESS_ISR_PS_FATAL_MEM_ERR		BIT(17)
+#define BUTTRESS_ISR_PS_NON_FATAL_MEM_ERR	BIT(18)
+#define BUTTRESS_ISR_PS_FAST_THROTTLE		BIT(19)
+#define BUTTRESS_ISR_UFI_ERROR			BIT(20)
+
+#define BUTTRESS_REG_IU2CSEDB0	0x100
+
+#define BUTTRESS_IU2CSEDB0_BUSY		BIT(31)
+#define BUTTRESS_IU2CSEDB0_IPC_CLIENT_ID_VAL	2
+
+#define BUTTRESS_REG_IU2CSEDATA0	0x104
+
+#define BUTTRESS_IU2CSEDATA0_IPC_BOOT_LOAD		1
+#define BUTTRESS_IU2CSEDATA0_IPC_AUTH_RUN		2
+#define BUTTRESS_IU2CSEDATA0_IPC_AUTH_REPLACE		3
+#define BUTTRESS_IU2CSEDATA0_IPC_UPDATE_SECURE_TOUCH	16
+
+#define BUTTRESS_CSE2IUDATA0_IPC_BOOT_LOAD_DONE			BIT(0)
+#define BUTTRESS_CSE2IUDATA0_IPC_AUTH_RUN_DONE			BIT(1)
+#define BUTTRESS_CSE2IUDATA0_IPC_AUTH_REPLACE_DONE		BIT(2)
+#define BUTTRESS_CSE2IUDATA0_IPC_UPDATE_SECURE_TOUCH_DONE	BIT(4)
+
+#define BUTTRESS_REG_IU2CSECSR		0x108
+
+#define BUTTRESS_IU2CSECSR_IPC_PEER_COMP_ACTIONS_RST_PHASE1		BIT(0)
+#define BUTTRESS_IU2CSECSR_IPC_PEER_COMP_ACTIONS_RST_PHASE2		BIT(1)
+#define BUTTRESS_IU2CSECSR_IPC_PEER_QUERIED_IP_COMP_ACTIONS_RST_PHASE	BIT(2)
+#define BUTTRESS_IU2CSECSR_IPC_PEER_ASSERTED_REG_VALID_REQ		BIT(3)
+#define BUTTRESS_IU2CSECSR_IPC_PEER_ACKED_REG_VALID			BIT(4)
+#define BUTTRESS_IU2CSECSR_IPC_PEER_DEASSERTED_REG_VALID_REQ		BIT(5)
+
+#define BUTTRESS_REG_CSE2IUDB0		0x304
+#define BUTTRESS_REG_CSE2IUCSR		0x30C
+#define BUTTRESS_REG_CSE2IUDATA0	0x308
+
+/* 0x20 == NACK, 0xf == unknown command */
+#define BUTTRESS_CSE2IUDATA0_IPC_NACK      0xf20
+#define BUTTRESS_CSE2IUDATA0_IPC_NACK_MASK GENMASK(15, 0)
+
+#define BUTTRESS_REG_ISH2IUCSR		0x50
+#define BUTTRESS_REG_ISH2IUDB0		0x54
+#define BUTTRESS_REG_ISH2IUDATA0	0x58
+
+#define BUTTRESS_REG_IU2ISHDB0		0x10C
+#define BUTTRESS_REG_IU2ISHDATA0	0x110
+#define BUTTRESS_REG_IU2ISHDATA1	0x114
+#define BUTTRESS_REG_IU2ISHCSR		0x118
+
+#define BUTTRESS_REG_FABRIC_CMD		0x88
+
+#define BUTTRESS_FABRIC_CMD_START_TSC_SYNC	BIT(0)
+#define BUTTRESS_FABRIC_CMD_IS_DRAIN		BIT(4)
+
+#define BUTTRESS_REG_TSW_CTL		0x120
+#define BUTTRESS_TSW_CTL_SOFT_RESET	BIT(8)
+
+#define BUTTRESS_REG_TSC_LO	0x164
+#define BUTTRESS_REG_TSC_HI	0x168
+
+#define BUTTRESS_IRQS		(BUTTRESS_ISR_IPC_FROM_CSE_IS_WAITING | \
+				 BUTTRESS_ISR_IPC_EXEC_DONE_BY_CSE |    \
+				 BUTTRESS_ISR_IS_IRQ | BUTTRESS_ISR_PS_IRQ)
+
+#define BUTTRESS_EVENT		 (BUTTRESS_ISR_IPC_FROM_CSE_IS_WAITING | \
+				  BUTTRESS_ISR_IPC_EXEC_DONE_BY_CSE |    \
+				  BUTTRESS_ISR_SAI_VIOLATION)
+#endif /* IPU6_PLATFORM_BUTTRESS_REGS_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-platform-isys-csi2-reg.h

@@ -0,0 +1,172 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2023--2024 Intel Corporation */
+
+#ifndef IPU6_PLATFORM_ISYS_CSI2_REG_H
+#define IPU6_PLATFORM_ISYS_CSI2_REG_H
+
+#include <linux/bits.h>
+
+#define CSI_REG_BASE			0x220000
+#define CSI_REG_PORT_BASE(id)		(CSI_REG_BASE + (id) * 0x1000)
+
+/* CSI Port Genral Purpose Registers */
+#define CSI_REG_PORT_GPREG_SRST                 0x0
+#define CSI_REG_PORT_GPREG_CSI2_SLV_REG_SRST    0x4
+#define CSI_REG_PORT_GPREG_CSI2_PORT_CONTROL    0x8
+
+/*
+ * Port IRQs mapping events:
+ * IRQ0 - CSI_FE event
+ * IRQ1 - CSI_SYNC
+ * IRQ2 - S2M_SIDS0TO7
+ * IRQ3 - S2M_SIDS8TO15
+ */
+#define CSI_PORT_REG_BASE_IRQ_CSI               0x80
+#define CSI_PORT_REG_BASE_IRQ_CSI_SYNC          0xA0
+#define CSI_PORT_REG_BASE_IRQ_S2M_SIDS0TOS7     0xC0
+#define CSI_PORT_REG_BASE_IRQ_S2M_SIDS8TOS15    0xE0
+
+#define CSI_PORT_REG_BASE_IRQ_EDGE_OFFSET	0x0
+#define CSI_PORT_REG_BASE_IRQ_MASK_OFFSET	0x4
+#define CSI_PORT_REG_BASE_IRQ_STATUS_OFFSET	0x8
+#define CSI_PORT_REG_BASE_IRQ_CLEAR_OFFSET	0xc
+#define CSI_PORT_REG_BASE_IRQ_ENABLE_OFFSET	0x10
+#define CSI_PORT_REG_BASE_IRQ_LEVEL_NOT_PULSE_OFFSET	0x14
+
+#define IPU6SE_CSI_RX_ERROR_IRQ_MASK		GENMASK(18, 0)
+#define IPU6_CSI_RX_ERROR_IRQ_MASK		GENMASK(19, 0)
+
+#define CSI_RX_NUM_ERRORS_IN_IRQ		20
+#define CSI_RX_NUM_IRQ				32
+
+#define IPU_CSI_RX_IRQ_FS_VC(chn)	(1 << ((chn) * 2))
+#define IPU_CSI_RX_IRQ_FE_VC(chn)	(2 << ((chn) * 2))
+
+/* PPI2CSI */
+#define CSI_REG_PPI2CSI_ENABLE				0x200
+#define CSI_REG_PPI2CSI_CONFIG_PPI_INTF			0x204
+#define PPI_INTF_CONFIG_NOF_ENABLED_DLANES_MASK		GENMASK(4, 3)
+#define CSI_REG_PPI2CSI_CONFIG_CSI_FEATURE		0x208
+
+enum CSI_PPI2CSI_CTRL {
+	CSI_PPI2CSI_DISABLE = 0,
+	CSI_PPI2CSI_ENABLE = 1,
+};
+
+/* CSI_FE */
+#define CSI_REG_CSI_FE_ENABLE                   0x280
+#define CSI_REG_CSI_FE_MODE                     0x284
+#define CSI_REG_CSI_FE_MUX_CTRL                 0x288
+#define CSI_REG_CSI_FE_SYNC_CNTR_SEL            0x290
+
+enum CSI_FE_ENABLE_TYPE {
+	CSI_FE_DISABLE = 0,
+	CSI_FE_ENABLE = 1,
+};
+
+enum CSI_FE_MODE_TYPE {
+	CSI_FE_DPHY_MODE = 0,
+	CSI_FE_CPHY_MODE = 1,
+};
+
+enum CSI_FE_INPUT_SELECTOR {
+	CSI_SENSOR_INPUT = 0,
+	CSI_MIPIGEN_INPUT = 1,
+};
+
+enum CSI_FE_SYNC_CNTR_SEL_TYPE {
+	CSI_CNTR_SENSOR_LINE_ID = BIT(0),
+	CSI_CNTR_INT_LINE_PKT_ID = ~CSI_CNTR_SENSOR_LINE_ID,
+	CSI_CNTR_SENSOR_FRAME_ID = BIT(1),
+	CSI_CNTR_INT_FRAME_PKT_ID = ~CSI_CNTR_SENSOR_FRAME_ID,
+};
+
+/* CSI HUB General Purpose Registers */
+#define CSI_REG_HUB_GPREG_SRST			(CSI_REG_BASE + 0x18000)
+#define CSI_REG_HUB_GPREG_SLV_REG_SRST		(CSI_REG_BASE + 0x18004)
+
+#define CSI_REG_HUB_DRV_ACCESS_PORT(id)	(CSI_REG_BASE + 0x18018 + (id) * 4)
+#define CSI_REG_HUB_FW_ACCESS_PORT_OFS		0x17000
+#define CSI_REG_HUB_FW_ACCESS_PORT_V6OFS	0x16000
+#define CSI_REG_HUB_FW_ACCESS_PORT(ofs, id)	\
+					(CSI_REG_BASE + (ofs) + (id) * 4)
+
+enum CSI_PORT_CLK_GATING_SWITCH {
+	CSI_PORT_CLK_GATING_OFF = 0,
+	CSI_PORT_CLK_GATING_ON = 1,
+};
+
+#define CSI_REG_BASE_HUB_IRQ                        0x18200
+
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_EDGE			0x238200
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_MASK			0x238204
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_STATUS			0x238208
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_CLEAR			0x23820c
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_ENABLE			0x238210
+#define IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_LEVEL_NOT_PULSE		0x238214
+
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_EDGE			0x238220
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_MASK			0x238224
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_STATUS			0x238228
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_CLEAR			0x23822c
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_ENABLE			0x238230
+#define IPU6_REG_ISYS_CSI_TOP_CTRL1_IRQ_LEVEL_NOT_PULSE		0x238234
+
+/* MTL IPU6V6 irq ctrl0 & ctrl1 */
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_EDGE			0x238700
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_MASK			0x238704
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_STATUS		0x238708
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_CLEAR			0x23870c
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_ENABLE		0x238710
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_LEVEL_NOT_PULSE	0x238714
+
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_EDGE			0x238720
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_MASK			0x238724
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_STATUS		0x238728
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_CLEAR			0x23872c
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_ENABLE		0x238730
+#define IPU6V6_REG_ISYS_CSI_TOP_CTRL1_IRQ_LEVEL_NOT_PULSE	0x238734
+
+/*
+ * 3:0 CSI_PORT.irq_out[3:0] CSI_PORT_CTRL0 IRQ outputs (4bits)
+ * [0] CSI_PORT.IRQ_CTRL0_csi
+ * [1] CSI_PORT.IRQ_CTRL1_csi_sync
+ * [2] CSI_PORT.IRQ_CTRL2_s2m_sids0to7
+ * [3] CSI_PORT.IRQ_CTRL3_s2m_sids8to15
+ */
+#define IPU6_ISYS_UNISPART_IRQ_CSI2(port)		\
+				   (0x3 << ((port) * IPU6_CSI_IRQ_NUM_PER_PIPE))
+
+/*
+ * ipu6se support 2 front ends, 2 port per front end, 4 ports 0..3
+ * sip0 - 0, 1
+ * sip1 - 2, 3
+ * 0 and 2 support 4 data lanes, 1 and 3 support 2 data lanes
+ * all offset are base from isys base address
+ */
+
+#define CSI2_HUB_GPREG_SIP_SRST(sip)			(0x238038 + (sip) * 4)
+#define CSI2_HUB_GPREG_SIP_FB_PORT_CFG(sip)		(0x238050 + (sip) * 4)
+
+#define CSI2_HUB_GPREG_DPHY_TIMER_INCR			0x238040
+#define CSI2_HUB_GPREG_HPLL_FREQ			0x238044
+#define CSI2_HUB_GPREG_IS_CLK_RATIO			0x238048
+#define CSI2_HUB_GPREG_HPLL_FREQ_ISCLK_RATE_OVERRIDE	0x23804c
+#define CSI2_HUB_GPREG_PORT_CLKGATING_DISABLE		0x238058
+#define CSI2_HUB_GPREG_SIP0_CSI_RX_A_CONTROL		0x23805c
+#define CSI2_HUB_GPREG_SIP0_CSI_RX_B_CONTROL		0x238088
+#define CSI2_HUB_GPREG_SIP1_CSI_RX_A_CONTROL		0x2380a4
+#define CSI2_HUB_GPREG_SIP1_CSI_RX_B_CONTROL		0x2380d0
+
+#define CSI2_SIP_TOP_CSI_RX_BASE(sip)		(0x23805c + (sip) * 0x48)
+#define CSI2_SIP_TOP_CSI_RX_PORT_BASE_0(port)	(0x23805c + ((port) / 2) * 0x48)
+#define CSI2_SIP_TOP_CSI_RX_PORT_BASE_1(port)	(0x238088 + ((port) / 2) * 0x48)
+
+/* offset from port base */
+#define CSI2_SIP_TOP_CSI_RX_PORT_CONTROL		0x0
+#define CSI2_SIP_TOP_CSI_RX_DLY_CNT_TERMEN_CLANE	0x4
+#define CSI2_SIP_TOP_CSI_RX_DLY_CNT_SETTLE_CLANE	0x8
+#define CSI2_SIP_TOP_CSI_RX_DLY_CNT_TERMEN_DLANE(lane)	(0xc + (lane) * 8)
+#define CSI2_SIP_TOP_CSI_RX_DLY_CNT_SETTLE_DLANE(lane)	(0x10 + (lane) * 8)
+
+#endif /* IPU6_ISYS_CSI2_REG_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6-platform-regs.h

@@ -0,0 +1,179 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2018 - 2024 Intel Corporation */
+
+#ifndef IPU6_PLATFORM_REGS_H
+#define IPU6_PLATFORM_REGS_H
+
+#include <linux/bits.h>
+
+/*
+ * IPU6 uses uniform address within IPU6, therefore all subsystem registers
+ * locates in one single space starts from 0 but in different sctions with
+ * different addresses, the subsystem offsets are defined to 0 as the
+ * register definition will have the address offset to 0.
+ */
+#define IPU6_UNIFIED_OFFSET			0
+
+#define IPU6_ISYS_IOMMU0_OFFSET		0x2e0000
+#define IPU6_ISYS_IOMMU1_OFFSET		0x2e0500
+#define IPU6_ISYS_IOMMUI_OFFSET		0x2e0a00
+
+#define IPU6_PSYS_IOMMU0_OFFSET		0x1b0000
+#define IPU6_PSYS_IOMMU1_OFFSET		0x1b0700
+#define IPU6_PSYS_IOMMU1R_OFFSET	0x1b0e00
+#define IPU6_PSYS_IOMMUI_OFFSET		0x1b1500
+
+/* the offset from IOMMU base register */
+#define IPU6_MMU_L1_STREAM_ID_REG_OFFSET	0x0c
+#define IPU6_MMU_L2_STREAM_ID_REG_OFFSET	0x4c
+#define IPU6_PSYS_MMU1W_L2_STREAM_ID_REG_OFFSET	0x8c
+
+#define IPU6_MMU_INFO_OFFSET		0x8
+
+#define IPU6_ISYS_SPC_OFFSET		0x210000
+
+#define IPU6SE_PSYS_SPC_OFFSET		0x110000
+#define IPU6_PSYS_SPC_OFFSET		0x118000
+
+#define IPU6_ISYS_DMEM_OFFSET		0x200000
+#define IPU6_PSYS_DMEM_OFFSET		0x100000
+
+#define IPU6_REG_ISYS_UNISPART_IRQ_EDGE			0x27c000
+#define IPU6_REG_ISYS_UNISPART_IRQ_MASK			0x27c004
+#define IPU6_REG_ISYS_UNISPART_IRQ_STATUS		0x27c008
+#define IPU6_REG_ISYS_UNISPART_IRQ_CLEAR		0x27c00c
+#define IPU6_REG_ISYS_UNISPART_IRQ_ENABLE		0x27c010
+#define IPU6_REG_ISYS_UNISPART_IRQ_LEVEL_NOT_PULSE	0x27c014
+#define IPU6_REG_ISYS_UNISPART_SW_IRQ_REG		0x27c414
+#define IPU6_REG_ISYS_UNISPART_SW_IRQ_MUX_REG		0x27c418
+#define IPU6_ISYS_UNISPART_IRQ_CSI0			BIT(2)
+#define IPU6_ISYS_UNISPART_IRQ_CSI1			BIT(3)
+#define IPU6_ISYS_UNISPART_IRQ_SW			BIT(22)
+
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_EDGE			0x2b0200
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_MASK			0x2b0204
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_STATUS		0x2b0208
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_CLEAR			0x2b020c
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_ENABLE		0x2b0210
+#define IPU6_REG_ISYS_ISL_TOP_IRQ_LEVEL_NOT_PULSE	0x2b0214
+
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_EDGE			0x2d2100
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_MASK			0x2d2104
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_STATUS		0x2d2108
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_CLEAR		0x2d210c
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_ENABLE		0x2d2110
+#define IPU6_REG_ISYS_CMPR_TOP_IRQ_LEVEL_NOT_PULSE	0x2d2114
+
+/* CDC Burst collector thresholds for isys - 3 FIFOs i = 0..2 */
+#define IPU6_REG_ISYS_CDC_THRESHOLD(i)		(0x27c400 + ((i) * 4))
+
+#define IPU6_CSI_IRQ_NUM_PER_PIPE			4
+#define IPU6SE_ISYS_CSI_PORT_NUM			4
+#define IPU6_ISYS_CSI_PORT_NUM				8
+
+#define IPU6_ISYS_CSI_PORT_IRQ(irq_num)		BIT(irq_num)
+
+/* PKG DIR OFFSET in IMR in secure mode */
+#define IPU6_PKG_DIR_IMR_OFFSET			0x40
+
+#define IPU6_ISYS_REG_SPC_STATUS_CTRL		0x0
+
+#define IPU6_ISYS_SPC_STATUS_START			BIT(1)
+#define IPU6_ISYS_SPC_STATUS_RUN			BIT(3)
+#define IPU6_ISYS_SPC_STATUS_READY			BIT(5)
+#define IPU6_ISYS_SPC_STATUS_CTRL_ICACHE_INVALIDATE	BIT(12)
+#define IPU6_ISYS_SPC_STATUS_ICACHE_PREFETCH		BIT(13)
+
+#define IPU6_PSYS_REG_SPC_STATUS_CTRL			0x0
+#define IPU6_PSYS_REG_SPC_START_PC			0x4
+#define IPU6_PSYS_REG_SPC_ICACHE_BASE			0x10
+#define IPU6_REG_PSYS_INFO_SEG_0_CONFIG_ICACHE_MASTER	0x14
+
+#define IPU6_PSYS_SPC_STATUS_START			BIT(1)
+#define IPU6_PSYS_SPC_STATUS_RUN			BIT(3)
+#define IPU6_PSYS_SPC_STATUS_READY			BIT(5)
+#define IPU6_PSYS_SPC_STATUS_CTRL_ICACHE_INVALIDATE	BIT(12)
+#define IPU6_PSYS_SPC_STATUS_ICACHE_PREFETCH		BIT(13)
+
+#define IPU6_PSYS_REG_SPP0_STATUS_CTRL			0x20000
+
+#define IPU6_INFO_ENABLE_SNOOP			BIT(0)
+#define IPU6_INFO_DEC_FORCE_FLUSH		BIT(1)
+#define IPU6_INFO_DEC_PASS_THROUGH		BIT(2)
+#define IPU6_INFO_ZLW				BIT(3)
+#define IPU6_INFO_REQUEST_DESTINATION_IOSF	BIT(9)
+#define IPU6_INFO_IMR_BASE			BIT(10)
+#define IPU6_INFO_IMR_DESTINED			BIT(11)
+
+#define IPU6_INFO_REQUEST_DESTINATION_PRIMARY IPU6_INFO_REQUEST_DESTINATION_IOSF
+
+/*
+ * s2m_pixel_soc_pixel_remapping is dedicated for the enabling of the
+ * pixel s2m remp ability.Remap here  means that s2m rearange the order
+ * of the pixels in each 4 pixels group.
+ * For examle, mirroring remping means that if input's 4 first pixels
+ * are 1 2 3 4 then in output we should see 4 3 2 1 in this 4 first pixels.
+ * 0xE4 is from s2m MAS document. It means no remapping.
+ */
+#define S2M_PIXEL_SOC_PIXEL_REMAPPING_FLAG_NO_REMAPPING 0xe4
+/*
+ * csi_be_soc_pixel_remapping is for the enabling of the pixel remapping.
+ * This remapping is exactly like the stream2mmio remapping.
+ */
+#define CSI_BE_SOC_PIXEL_REMAPPING_FLAG_NO_REMAPPING    0xe4
+
+#define IPU6_REG_DMA_TOP_AB_GROUP1_BASE_ADDR		0x1ae000
+#define IPU6_REG_DMA_TOP_AB_GROUP2_BASE_ADDR		0x1af000
+#define IPU6_REG_DMA_TOP_AB_RING_MIN_OFFSET(n)		(0x4 + (n) * 0xc)
+#define IPU6_REG_DMA_TOP_AB_RING_MAX_OFFSET(n)		(0x8 + (n) * 0xc)
+#define IPU6_REG_DMA_TOP_AB_RING_ACCESS_OFFSET(n)	(0xc + (n) * 0xc)
+
+enum ipu6_device_ab_group1_target_id {
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R0_SPC_DMEM,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R1_SPC_DMEM,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R2_SPC_DMEM,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R3_SPC_STATUS_REG,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R4_SPC_MASTER_BASE_ADDR,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R5_SPC_PC_STALL,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R6_SPC_EQ,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R7_SPC_RESERVED,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R8_SPC_RESERVED,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R9_SPP0,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R10_SPP1,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R11_CENTRAL_R1,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R12_IRQ,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R13_CENTRAL_R2,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R14_DMA,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R15_DMA,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R16_GP,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R17_ZLW_INSERTER,
+	IPU6_DEVICE_AB_GROUP1_TARGET_ID_R18_AB,
+};
+
+enum nci_ab_access_mode {
+	NCI_AB_ACCESS_MODE_RW,	/* read & write */
+	NCI_AB_ACCESS_MODE_RO,	/* read only */
+	NCI_AB_ACCESS_MODE_WO,	/* write only */
+	NCI_AB_ACCESS_MODE_NA,	/* No access at all */
+};
+
+/* IRQ-related registers in PSYS */
+#define IPU6_REG_PSYS_GPDEV_IRQ_EDGE		0x1aa200
+#define IPU6_REG_PSYS_GPDEV_IRQ_MASK		0x1aa204
+#define IPU6_REG_PSYS_GPDEV_IRQ_STATUS		0x1aa208
+#define IPU6_REG_PSYS_GPDEV_IRQ_CLEAR		0x1aa20c
+#define IPU6_REG_PSYS_GPDEV_IRQ_ENABLE		0x1aa210
+#define IPU6_REG_PSYS_GPDEV_IRQ_LEVEL_NOT_PULSE	0x1aa214
+/* There are 8 FW interrupts, n = 0..7 */
+#define IPU6_PSYS_GPDEV_FWIRQ0			5
+#define IPU6_PSYS_GPDEV_FWIRQ1			6
+#define IPU6_PSYS_GPDEV_FWIRQ2			7
+#define IPU6_PSYS_GPDEV_FWIRQ3			8
+#define IPU6_PSYS_GPDEV_FWIRQ4			9
+#define IPU6_PSYS_GPDEV_FWIRQ5			10
+#define IPU6_PSYS_GPDEV_FWIRQ6			11
+#define IPU6_PSYS_GPDEV_FWIRQ7			12
+#define IPU6_PSYS_GPDEV_IRQ_FWIRQ(n)		BIT(n)
+#define IPU6_REG_PSYS_GPDEV_FWIRQ(n)		(4 * (n) + 0x1aa100)
+
+#endif /* IPU6_PLATFORM_REGS_H */

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6.c

@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013--2024 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/pci-ats.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <media/ipu-bridge.h>
+#include <media/ipu6-pci-table.h>
+
+#include "ipu6.h"
+#include "ipu6-bus.h"
+#include "ipu6-buttress.h"
+#include "ipu6-cpd.h"
+#include "ipu6-isys.h"
+#include "ipu6-mmu.h"
+#include "ipu6-platform-buttress-regs.h"
+#include "ipu6-platform-isys-csi2-reg.h"
+#include "ipu6-platform-regs.h"
+
+#define IPU6_PCI_BAR		0
+
+struct ipu6_cell_program {
+	u32 magic_number;
+
+	u32 blob_offset;
+	u32 blob_size;
+
+	u32 start[3];
+
+	u32 icache_source;
+	u32 icache_target;
+	u32 icache_size;
+
+	u32 pmem_source;
+	u32 pmem_target;
+	u32 pmem_size;
+
+	u32 data_source;
+	u32 data_target;
+	u32 data_size;
+
+	u32 bss_target;
+	u32 bss_size;
+
+	u32 cell_id;
+	u32 regs_addr;
+
+	u32 cell_pmem_data_bus_address;
+	u32 cell_dmem_data_bus_address;
+	u32 cell_pmem_control_bus_address;
+	u32 cell_dmem_control_bus_address;
+
+	u32 next;
+	u32 dummy[2];
+};
+
+static struct ipu6_isys_internal_pdata isys_ipdata = {
+	.hw_variant = {
+		.offset = IPU6_UNIFIED_OFFSET,
+		.nr_mmus = 3,
+		.mmu_hw = {
+			{
+				.offset = IPU6_ISYS_IOMMU0_OFFSET,
+				.info_bits = IPU6_INFO_REQUEST_DESTINATION_IOSF,
+				.nr_l1streams = 16,
+				.l1_block_sz = {
+					3, 8, 2, 2, 2, 2, 2, 2, 1, 1,
+					1, 1, 1, 1, 1, 1
+				},
+				.nr_l2streams = 16,
+				.l2_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.insert_read_before_invalidate = false,
+				.l1_stream_id_reg_offset =
+				IPU6_MMU_L1_STREAM_ID_REG_OFFSET,
+				.l2_stream_id_reg_offset =
+				IPU6_MMU_L2_STREAM_ID_REG_OFFSET,
+			},
+			{
+				.offset = IPU6_ISYS_IOMMU1_OFFSET,
+				.info_bits = 0,
+				.nr_l1streams = 16,
+				.l1_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 1, 1, 4
+				},
+				.nr_l2streams = 16,
+				.l2_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.insert_read_before_invalidate = false,
+				.l1_stream_id_reg_offset =
+				IPU6_MMU_L1_STREAM_ID_REG_OFFSET,
+				.l2_stream_id_reg_offset =
+				IPU6_MMU_L2_STREAM_ID_REG_OFFSET,
+			},
+			{
+				.offset = IPU6_ISYS_IOMMUI_OFFSET,
+				.info_bits = 0,
+				.nr_l1streams = 0,
+				.nr_l2streams = 0,
+				.insert_read_before_invalidate = false,
+			},
+		},
+		.cdc_fifos = 3,
+		.cdc_fifo_threshold = {6, 8, 2},
+		.dmem_offset = IPU6_ISYS_DMEM_OFFSET,
+		.spc_offset = IPU6_ISYS_SPC_OFFSET,
+	},
+	.isys_dma_overshoot = IPU6_ISYS_OVERALLOC_MIN,
+};
+
+static struct ipu6_psys_internal_pdata psys_ipdata = {
+	.hw_variant = {
+		.offset = IPU6_UNIFIED_OFFSET,
+		.nr_mmus = 4,
+		.mmu_hw = {
+			{
+				.offset = IPU6_PSYS_IOMMU0_OFFSET,
+				.info_bits =
+				IPU6_INFO_REQUEST_DESTINATION_IOSF,
+				.nr_l1streams = 16,
+				.l1_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.nr_l2streams = 16,
+				.l2_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.insert_read_before_invalidate = false,
+				.l1_stream_id_reg_offset =
+				IPU6_MMU_L1_STREAM_ID_REG_OFFSET,
+				.l2_stream_id_reg_offset =
+				IPU6_MMU_L2_STREAM_ID_REG_OFFSET,
+			},
+			{
+				.offset = IPU6_PSYS_IOMMU1_OFFSET,
+				.info_bits = 0,
+				.nr_l1streams = 32,
+				.l1_block_sz = {
+					1, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 10,
+					5, 4, 14, 6, 4, 14, 6, 4, 8,
+					4, 2, 1, 1, 1, 1, 14
+				},
+				.nr_l2streams = 32,
+				.l2_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.insert_read_before_invalidate = false,
+				.l1_stream_id_reg_offset =
+				IPU6_MMU_L1_STREAM_ID_REG_OFFSET,
+				.l2_stream_id_reg_offset =
+				IPU6_PSYS_MMU1W_L2_STREAM_ID_REG_OFFSET,
+			},
+			{
+				.offset = IPU6_PSYS_IOMMU1R_OFFSET,
+				.info_bits = 0,
+				.nr_l1streams = 16,
+				.l1_block_sz = {
+					1, 4, 4, 4, 4, 16, 8, 4, 32,
+					16, 16, 2, 2, 2, 1, 12
+				},
+				.nr_l2streams = 16,
+				.l2_block_sz = {
+					2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+					2, 2, 2, 2, 2, 2
+				},
+				.insert_read_before_invalidate = false,
+				.l1_stream_id_reg_offset =
+				IPU6_MMU_L1_STREAM_ID_REG_OFFSET,
+				.l2_stream_id_reg_offset =
+				IPU6_MMU_L2_STREAM_ID_REG_OFFSET,
+			},
+			{
+				.offset = IPU6_PSYS_IOMMUI_OFFSET,
+				.info_bits = 0,
+				.nr_l1streams = 0,
+				.nr_l2streams = 0,
+				.insert_read_before_invalidate = false,
+			},
+		},
+		.dmem_offset = IPU6_PSYS_DMEM_OFFSET,
+	},
+};
+
+static const struct ipu6_buttress_ctrl isys_buttress_ctrl = {
+	.ratio = IPU6_IS_FREQ_CTL_DEFAULT_RATIO,
+	.qos_floor = IPU6_IS_FREQ_CTL_DEFAULT_QOS_FLOOR_RATIO,
+	.freq_ctl = IPU6_BUTTRESS_REG_IS_FREQ_CTL,
+	.pwr_sts_shift = IPU6_BUTTRESS_PWR_STATE_IS_PWR_SHIFT,
+	.pwr_sts_mask = IPU6_BUTTRESS_PWR_STATE_IS_PWR_MASK,
+	.pwr_sts_on = IPU6_BUTTRESS_PWR_STATE_UP_DONE,
+	.pwr_sts_off = IPU6_BUTTRESS_PWR_STATE_DN_DONE,
+};
+
+static const struct ipu6_buttress_ctrl psys_buttress_ctrl = {
+	.ratio = IPU6_PS_FREQ_CTL_DEFAULT_RATIO,
+	.qos_floor = IPU6_PS_FREQ_CTL_DEFAULT_QOS_FLOOR_RATIO,
+	.freq_ctl = IPU6_BUTTRESS_REG_PS_FREQ_CTL,
+	.pwr_sts_shift = IPU6_BUTTRESS_PWR_STATE_PS_PWR_SHIFT,
+	.pwr_sts_mask = IPU6_BUTTRESS_PWR_STATE_PS_PWR_MASK,
+	.pwr_sts_on = IPU6_BUTTRESS_PWR_STATE_UP_DONE,
+	.pwr_sts_off = IPU6_BUTTRESS_PWR_STATE_DN_DONE,
+};
+
+static void
+ipu6_pkg_dir_configure_spc(struct ipu6_device *isp,
+			   const struct ipu6_hw_variants *hw_variant,
+			   int pkg_dir_idx, void __iomem *base,
+			   u64 *pkg_dir, dma_addr_t pkg_dir_vied_address)
+{
+	struct ipu6_cell_program *prog;
+	void __iomem *spc_base;
+	u32 server_fw_addr;
+	dma_addr_t dma_addr;
+	u32 pg_offset;
+
+	server_fw_addr = lower_32_bits(*(pkg_dir + (pkg_dir_idx + 1) * 2));
+	if (pkg_dir_idx == IPU6_CPD_PKG_DIR_ISYS_SERVER_IDX)
+		dma_addr = sg_dma_address(isp->isys->fw_sgt.sgl);
+	else
+		dma_addr = sg_dma_address(isp->psys->fw_sgt.sgl);
+
+	pg_offset = server_fw_addr - dma_addr;
+	prog = (struct ipu6_cell_program *)((uintptr_t)isp->cpd_fw->data +
+					    pg_offset);
+	spc_base = base + prog->regs_addr;
+	if (spc_base != (base + hw_variant->spc_offset))
+		dev_warn(&isp->pdev->dev,
+			 "SPC reg addr %p not matching value from CPD %p\n",
+			 base + hw_variant->spc_offset, spc_base);
+	writel(server_fw_addr + prog->blob_offset +
+	       prog->icache_source, spc_base + IPU6_PSYS_REG_SPC_ICACHE_BASE);
+	writel(IPU6_INFO_REQUEST_DESTINATION_IOSF,
+	       spc_base + IPU6_REG_PSYS_INFO_SEG_0_CONFIG_ICACHE_MASTER);
+	writel(prog->start[1], spc_base + IPU6_PSYS_REG_SPC_START_PC);
+	writel(pkg_dir_vied_address, base + hw_variant->dmem_offset);
+}
+
+void ipu6_configure_spc(struct ipu6_device *isp,
+			const struct ipu6_hw_variants *hw_variant,
+			int pkg_dir_idx, void __iomem *base, u64 *pkg_dir,
+			dma_addr_t pkg_dir_dma_addr)
+{
+	void __iomem *dmem_base = base + hw_variant->dmem_offset;
+	void __iomem *spc_regs_base = base + hw_variant->spc_offset;
+	u32 val;
+
+	val = readl(spc_regs_base + IPU6_PSYS_REG_SPC_STATUS_CTRL);
+	val |= IPU6_PSYS_SPC_STATUS_CTRL_ICACHE_INVALIDATE;
+	writel(val, spc_regs_base + IPU6_PSYS_REG_SPC_STATUS_CTRL);
+
+	if (isp->secure_mode)
+		writel(IPU6_PKG_DIR_IMR_OFFSET, dmem_base);
+	else
+		ipu6_pkg_dir_configure_spc(isp, hw_variant, pkg_dir_idx, base,
+					   pkg_dir, pkg_dir_dma_addr);
+}
+EXPORT_SYMBOL_NS_GPL(ipu6_configure_spc, "INTEL_IPU6");
+
+#define IPU6_ISYS_CSI2_NPORTS		4
+#define IPU6SE_ISYS_CSI2_NPORTS		4
+#define IPU6_TGL_ISYS_CSI2_NPORTS	8
+#define IPU6EP_MTL_ISYS_CSI2_NPORTS	6
+
+static void ipu6_internal_pdata_init(struct ipu6_device *isp)
+{
+	u8 hw_ver = isp->hw_ver;
+
+	isys_ipdata.num_parallel_streams = IPU6_ISYS_NUM_STREAMS;
+	isys_ipdata.sram_gran_shift = IPU6_SRAM_GRANULARITY_SHIFT;
+	isys_ipdata.sram_gran_size = IPU6_SRAM_GRANULARITY_SIZE;
+	isys_ipdata.max_sram_size = IPU6_MAX_SRAM_SIZE;
+	isys_ipdata.sensor_type_start = IPU6_FW_ISYS_SENSOR_TYPE_START;
+	isys_ipdata.sensor_type_end = IPU6_FW_ISYS_SENSOR_TYPE_END;
+	isys_ipdata.max_streams = IPU6_ISYS_NUM_STREAMS;
+	isys_ipdata.max_send_queues = IPU6_N_MAX_SEND_QUEUES;
+	isys_ipdata.max_sram_blocks = IPU6_NOF_SRAM_BLOCKS_MAX;
+	isys_ipdata.max_devq_size = IPU6_DEV_SEND_QUEUE_SIZE;
+	isys_ipdata.csi2.nports = IPU6_ISYS_CSI2_NPORTS;
+	isys_ipdata.csi2.irq_mask = IPU6_CSI_RX_ERROR_IRQ_MASK;
+	isys_ipdata.csi2.ctrl0_irq_edge = IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_EDGE;
+	isys_ipdata.csi2.ctrl0_irq_clear =
+		IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_CLEAR;
+	isys_ipdata.csi2.ctrl0_irq_mask = IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_MASK;
+	isys_ipdata.csi2.ctrl0_irq_enable =
+		IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_ENABLE;
+	isys_ipdata.csi2.ctrl0_irq_status =
+		IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_STATUS;
+	isys_ipdata.csi2.ctrl0_irq_lnp =
+		IPU6_REG_ISYS_CSI_TOP_CTRL0_IRQ_LEVEL_NOT_PULSE;
+	isys_ipdata.enhanced_iwake = is_ipu6ep_mtl(hw_ver) || is_ipu6ep(hw_ver);
+	psys_ipdata.hw_variant.spc_offset = IPU6_PSYS_SPC_OFFSET;
+	isys_ipdata.csi2.fw_access_port_ofs = CSI_REG_HUB_FW_ACCESS_PORT_OFS;
+
+	if (is_ipu6ep(hw_ver)) {
+		isys_ipdata.ltr = IPU6EP_LTR_VALUE;
+		isys_ipdata.memopen_threshold = IPU6EP_MIN_MEMOPEN_TH;
+	}
+
+	if (is_ipu6_tgl(hw_ver))
+		isys_ipdata.csi2.nports = IPU6_TGL_ISYS_CSI2_NPORTS;
+
+	if (is_ipu6ep_mtl(hw_ver)) {
+		isys_ipdata.csi2.nports = IPU6EP_MTL_ISYS_CSI2_NPORTS;
+
+		isys_ipdata.csi2.ctrl0_irq_edge =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_EDGE;
+		isys_ipdata.csi2.ctrl0_irq_clear =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_CLEAR;
+		isys_ipdata.csi2.ctrl0_irq_mask =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_MASK;
+		isys_ipdata.csi2.ctrl0_irq_enable =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_ENABLE;
+		isys_ipdata.csi2.ctrl0_irq_lnp =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_LEVEL_NOT_PULSE;
+		isys_ipdata.csi2.ctrl0_irq_status =
+			IPU6V6_REG_ISYS_CSI_TOP_CTRL0_IRQ_STATUS;
+		isys_ipdata.csi2.fw_access_port_ofs =
+			CSI_REG_HUB_FW_ACCESS_PORT_V6OFS;
+		isys_ipdata.ltr = IPU6EP_MTL_LTR_VALUE;
+		isys_ipdata.memopen_threshold = IPU6EP_MTL_MIN_MEMOPEN_TH;
+	}
+
+	if (is_ipu6se(hw_ver)) {
+		isys_ipdata.csi2.nports = IPU6SE_ISYS_CSI2_NPORTS;
+		isys_ipdata.csi2.irq_mask = IPU6SE_CSI_RX_ERROR_IRQ_MASK;
+		isys_ipdata.num_parallel_streams = IPU6SE_ISYS_NUM_STREAMS;
+		isys_ipdata.sram_gran_shift = IPU6SE_SRAM_GRANULARITY_SHIFT;
+		isys_ipdata.sram_gran_size = IPU6SE_SRAM_GRANULARITY_SIZE;
+		isys_ipdata.max_sram_size = IPU6SE_MAX_SRAM_SIZE;
+		isys_ipdata.sensor_type_start =
+			IPU6SE_FW_ISYS_SENSOR_TYPE_START;
+		isys_ipdata.sensor_type_end = IPU6SE_FW_ISYS_SENSOR_TYPE_END;
+		isys_ipdata.max_streams = IPU6SE_ISYS_NUM_STREAMS;
+		isys_ipdata.max_send_queues = IPU6SE_N_MAX_SEND_QUEUES;
+		isys_ipdata.max_sram_blocks = IPU6SE_NOF_SRAM_BLOCKS_MAX;
+		isys_ipdata.max_devq_size = IPU6SE_DEV_SEND_QUEUE_SIZE;
+		psys_ipdata.hw_variant.spc_offset = IPU6SE_PSYS_SPC_OFFSET;
+	}
+}
+
+static struct ipu6_bus_device *
+ipu6_isys_init(struct pci_dev *pdev, struct device *parent,
+	       struct ipu6_buttress_ctrl *ctrl, void __iomem *base,
+	       const struct ipu6_isys_internal_pdata *ipdata)
+{
+	struct device *dev = &pdev->dev;
+	struct ipu6_bus_device *isys_adev;
+	struct ipu6_isys_pdata *pdata;
+	int ret;
+
+	ret = ipu_bridge_init(dev, ipu_bridge_parse_ssdb);
+	if (ret) {
+		dev_err_probe(dev, ret, "IPU6 bridge init failed\n");
+		return ERR_PTR(ret);
+	}
+
+	pdata = kzalloc_obj(*pdata);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	pdata->base = base;
+	pdata->ipdata = ipdata;
+
+	isys_adev = ipu6_bus_initialize_device(pdev, parent, pdata, ctrl,
+					       IPU6_ISYS_NAME);
+	if (IS_ERR(isys_adev)) {
+		kfree(pdata);
+		return dev_err_cast_probe(dev, isys_adev,
+				"ipu6_bus_initialize_device isys failed\n");
+	}
+
+	isys_adev->mmu = ipu6_mmu_init(dev, base, ISYS_MMID,
+				       &ipdata->hw_variant);
+	if (IS_ERR(isys_adev->mmu)) {
+		put_device(&isys_adev->auxdev.dev);
+		kfree(pdata);
+		return dev_err_cast_probe(dev, isys_adev->mmu,
+				"ipu6_mmu_init(isys_adev->mmu) failed\n");
+	}
+
+	isys_adev->mmu->dev = &isys_adev->auxdev.dev;
+
+	ret = ipu6_bus_add_device(isys_adev);
+	if (ret) {
+		kfree(pdata);
+		return ERR_PTR(ret);
+	}
+
+	return isys_adev;
+}
+
+static struct ipu6_bus_device *
+ipu6_psys_init(struct pci_dev *pdev, struct device *parent,
+	       struct ipu6_buttress_ctrl *ctrl, void __iomem *base,
+	       const struct ipu6_psys_internal_pdata *ipdata)
+{
+	struct ipu6_bus_device *psys_adev;
+	struct ipu6_psys_pdata *pdata;
+	int ret;
+
+	pdata = kzalloc_obj(*pdata);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	pdata->base = base;
+	pdata->ipdata = ipdata;
+
+	psys_adev = ipu6_bus_initialize_device(pdev, parent, pdata, ctrl,
+					       IPU6_PSYS_NAME);
+	if (IS_ERR(psys_adev)) {
+		kfree(pdata);
+		return dev_err_cast_probe(&pdev->dev, psys_adev,
+				"ipu6_bus_initialize_device psys failed\n");
+	}
+
+	psys_adev->mmu = ipu6_mmu_init(&pdev->dev, base, PSYS_MMID,
+				       &ipdata->hw_variant);
+	if (IS_ERR(psys_adev->mmu)) {
+		put_device(&psys_adev->auxdev.dev);
+		kfree(pdata);
+		return dev_err_cast_probe(&pdev->dev, psys_adev->mmu,
+				"ipu6_mmu_init(psys_adev->mmu) failed\n");
+	}
+
+	psys_adev->mmu->dev = &psys_adev->auxdev.dev;
+
+	ret = ipu6_bus_add_device(psys_adev);
+	if (ret) {
+		kfree(pdata);
+		return ERR_PTR(ret);
+	}
+
+	return psys_adev;
+}
+
+static int ipu6_pci_config_setup(struct pci_dev *dev, u8 hw_ver)
+{
+	int ret;
+
+	/* No PCI msi capability for IPU6EP */
+	if (is_ipu6ep(hw_ver) || is_ipu6ep_mtl(hw_ver)) {
+		/* likely do nothing as msi not enabled by default */
+		pci_disable_msi(dev);
+		return 0;
+	}
+
+	ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_MSI);
+	if (ret < 0)
+		return dev_err_probe(&dev->dev, ret, "Request msi failed");
+
+	return 0;
+}
+
+static void ipu6_configure_vc_mechanism(struct ipu6_device *isp)
+{
+	u32 val = readl(isp->base + BUTTRESS_REG_BTRS_CTRL);
+
+	if (IPU6_BTRS_ARB_STALL_MODE_VC0 == IPU6_BTRS_ARB_MODE_TYPE_STALL)
+		val |= BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC0;
+	else
+		val &= ~BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC0;
+
+	if (IPU6_BTRS_ARB_STALL_MODE_VC1 == IPU6_BTRS_ARB_MODE_TYPE_STALL)
+		val |= BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC1;
+	else
+		val &= ~BUTTRESS_REG_BTRS_CTRL_STALL_MODE_VC1;
+
+	writel(val, isp->base + BUTTRESS_REG_BTRS_CTRL);
+}
+
+static int ipu6_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct ipu6_buttress_ctrl *isys_ctrl = NULL, *psys_ctrl = NULL;
+	struct device *dev = &pdev->dev;
+	void __iomem *isys_base = NULL;
+	void __iomem *psys_base = NULL;
+	struct ipu6_device *isp;
+	phys_addr_t phys;
+	u32 val, version, sku_id;
+	int ret;
+
+	isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
+	if (!isp)
+		return -ENOMEM;
+
+	isp->pdev = pdev;
+	INIT_LIST_HEAD(&isp->devices);
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Enable PCI device failed\n");
+
+	phys = pci_resource_start(pdev, IPU6_PCI_BAR);
+	dev_dbg(dev, "IPU6 PCI bar[%u] = %pa\n", IPU6_PCI_BAR, &phys);
+
+	isp->base = pcim_iomap_region(pdev, IPU6_PCI_BAR, IPU6_NAME);
+	if (IS_ERR(isp->base))
+		return dev_err_probe(dev, PTR_ERR(isp->base),
+				     "Failed to I/O mem remapping\n");
+
+	pci_set_drvdata(pdev, isp);
+	pci_set_master(pdev);
+
+	isp->cpd_metadata_cmpnt_size = sizeof(struct ipu6_cpd_metadata_cmpnt);
+	switch (id->device) {
+	case PCI_DEVICE_ID_INTEL_IPU6:
+		isp->hw_ver = IPU6_VER_6;
+		isp->cpd_fw_name = IPU6_FIRMWARE_NAME;
+		break;
+	case PCI_DEVICE_ID_INTEL_IPU6SE:
+		isp->hw_ver = IPU6_VER_6SE;
+		isp->cpd_fw_name = IPU6SE_FIRMWARE_NAME;
+		isp->cpd_metadata_cmpnt_size =
+			sizeof(struct ipu6se_cpd_metadata_cmpnt);
+		break;
+	case PCI_DEVICE_ID_INTEL_IPU6EP_ADLP:
+	case PCI_DEVICE_ID_INTEL_IPU6EP_RPLP:
+		isp->hw_ver = IPU6_VER_6EP;
+		isp->cpd_fw_name = IPU6EP_FIRMWARE_NAME;
+		break;
+	case PCI_DEVICE_ID_INTEL_IPU6EP_ADLN:
+		isp->hw_ver = IPU6_VER_6EP;
+		isp->cpd_fw_name = IPU6EPADLN_FIRMWARE_NAME;
+		break;
+	case PCI_DEVICE_ID_INTEL_IPU6EP_MTL:
+		isp->hw_ver = IPU6_VER_6EP_MTL;
+		isp->cpd_fw_name = IPU6EPMTL_FIRMWARE_NAME;
+		break;
+	default:
+		return dev_err_probe(dev, -ENODEV,
+				     "Unsupported IPU6 device %x\n",
+				     id->device);
+	}
+
+	ipu6_internal_pdata_init(isp);
+
+	isys_base = isp->base + isys_ipdata.hw_variant.offset;
+	psys_base = isp->base + psys_ipdata.hw_variant.offset;
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(39));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set DMA mask\n");
+
+	dma_set_max_seg_size(dev, UINT_MAX);
+
+	ret = ipu6_pci_config_setup(pdev, isp->hw_ver);
+	if (ret)
+		return ret;
+
+	ret = ipu6_buttress_init(isp);
+	if (ret)
+		return ret;
+
+	ret = request_firmware(&isp->cpd_fw, isp->cpd_fw_name, dev);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret,
+			      "Requesting signed firmware %s failed\n",
+			      isp->cpd_fw_name);
+		goto buttress_exit;
+	}
+
+	ret = ipu6_cpd_validate_cpd_file(isp, isp->cpd_fw->data,
+					 isp->cpd_fw->size);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret,
+			      "Failed to validate cpd\n");
+		goto out_ipu6_bus_del_devices;
+	}
+
+	isys_ctrl = devm_kmemdup(dev, &isys_buttress_ctrl,
+				 sizeof(isys_buttress_ctrl), GFP_KERNEL);
+	if (!isys_ctrl) {
+		ret = -ENOMEM;
+		goto out_ipu6_bus_del_devices;
+	}
+
+	isp->isys = ipu6_isys_init(pdev, dev, isys_ctrl, isys_base,
+				   &isys_ipdata);
+	if (IS_ERR(isp->isys)) {
+		ret = PTR_ERR(isp->isys);
+		goto out_ipu6_bus_del_devices;
+	}
+
+	psys_ctrl = devm_kmemdup(dev, &psys_buttress_ctrl,
+				 sizeof(psys_buttress_ctrl), GFP_KERNEL);
+	if (!psys_ctrl) {
+		ret = -ENOMEM;
+		goto out_ipu6_bus_del_devices;
+	}
+
+	isp->psys = ipu6_psys_init(pdev, &isp->isys->auxdev.dev, psys_ctrl,
+				   psys_base, &psys_ipdata);
+	if (IS_ERR(isp->psys)) {
+		ret = PTR_ERR(isp->psys);
+		goto out_ipu6_bus_del_devices;
+	}
+
+	ret = pm_runtime_resume_and_get(&isp->psys->auxdev.dev);
+	if (ret < 0)
+		goto out_ipu6_bus_del_devices;
+
+	ret = ipu6_mmu_hw_init(isp->psys->mmu);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret,
+			      "Failed to set MMU hardware\n");
+		goto out_ipu6_rpm_put;
+	}
+
+	ret = ipu6_buttress_map_fw_image(isp->psys, isp->cpd_fw,
+					 &isp->psys->fw_sgt);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret, "failed to map fw image\n");
+		goto out_ipu6_rpm_put;
+	}
+
+	ret = ipu6_cpd_create_pkg_dir(isp->psys, isp->cpd_fw->data);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret,
+			      "failed to create pkg dir\n");
+		goto out_ipu6_rpm_put;
+	}
+
+	ret = devm_request_threaded_irq(dev, pdev->irq, ipu6_buttress_isr,
+					ipu6_buttress_isr_threaded,
+					IRQF_SHARED, IPU6_NAME, isp);
+	if (ret) {
+		dev_err_probe(dev, ret, "Requesting irq failed\n");
+		goto out_ipu6_rpm_put;
+	}
+
+	ret = ipu6_buttress_authenticate(isp);
+	if (ret) {
+		dev_err_probe(&isp->pdev->dev, ret,
+			      "FW authentication failed\n");
+		goto out_free_irq;
+	}
+
+	ipu6_mmu_hw_cleanup(isp->psys->mmu);
+	pm_runtime_put(&isp->psys->auxdev.dev);
+
+	/* Configure the arbitration mechanisms for VC requests */
+	ipu6_configure_vc_mechanism(isp);
+
+	val = readl(isp->base + BUTTRESS_REG_SKU);
+	sku_id = FIELD_GET(GENMASK(6, 4), val);
+	version = FIELD_GET(GENMASK(3, 0), val);
+	dev_info(dev, "IPU%u-v%u[%x] hardware version %d\n", version, sku_id,
+		 pdev->device, isp->hw_ver);
+
+	pm_runtime_put_noidle(dev);
+	pm_runtime_allow(dev);
+
+	isp->bus_ready_to_probe = true;
+
+	return 0;
+
+out_free_irq:
+	devm_free_irq(dev, pdev->irq, isp);
+out_ipu6_rpm_put:
+	pm_runtime_put_sync(&isp->psys->auxdev.dev);
+out_ipu6_bus_del_devices:
+	if (!IS_ERR_OR_NULL(isp->psys)) {
+		ipu6_cpd_free_pkg_dir(isp->psys);
+		ipu6_buttress_unmap_fw_image(isp->psys, &isp->psys->fw_sgt);
+	}
+	if (!IS_ERR_OR_NULL(isp->psys) && !IS_ERR_OR_NULL(isp->psys->mmu))
+		ipu6_mmu_cleanup(isp->psys->mmu);
+	if (!IS_ERR_OR_NULL(isp->isys) && !IS_ERR_OR_NULL(isp->isys->mmu))
+		ipu6_mmu_cleanup(isp->isys->mmu);
+	ipu6_bus_del_devices(pdev);
+	release_firmware(isp->cpd_fw);
+buttress_exit:
+	ipu6_buttress_exit(isp);
+
+	return ret;
+}
+
+static void ipu6_pci_remove(struct pci_dev *pdev)
+{
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+	struct ipu6_mmu *isys_mmu = isp->isys->mmu;
+	struct ipu6_mmu *psys_mmu = isp->psys->mmu;
+
+	devm_free_irq(&pdev->dev, pdev->irq, isp);
+	ipu6_cpd_free_pkg_dir(isp->psys);
+
+	ipu6_buttress_unmap_fw_image(isp->psys, &isp->psys->fw_sgt);
+	ipu6_buttress_exit(isp);
+
+	ipu6_bus_del_devices(pdev);
+
+	pm_runtime_forbid(&pdev->dev);
+	pm_runtime_get_noresume(&pdev->dev);
+
+	release_firmware(isp->cpd_fw);
+
+	ipu6_mmu_cleanup(psys_mmu);
+	ipu6_mmu_cleanup(isys_mmu);
+}
+
+static void ipu6_pci_reset_prepare(struct pci_dev *pdev)
+{
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+
+	pm_runtime_forbid(&isp->pdev->dev);
+}
+
+static void ipu6_pci_reset_done(struct pci_dev *pdev)
+{
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+
+	ipu6_buttress_restore(isp);
+	if (isp->secure_mode)
+		ipu6_buttress_reset_authentication(isp);
+
+	isp->need_ipc_reset = true;
+	pm_runtime_allow(&isp->pdev->dev);
+}
+
+/*
+ * PCI base driver code requires driver to provide these to enable
+ * PCI device level PM state transitions (D0<->D3)
+ */
+static int ipu6_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	synchronize_irq(pdev->irq);
+	return 0;
+}
+
+static int ipu6_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+	struct ipu6_buttress *b = &isp->buttress;
+	int ret;
+
+	/* Configure the arbitration mechanisms for VC requests */
+	ipu6_configure_vc_mechanism(isp);
+
+	isp->secure_mode = ipu6_buttress_get_secure_mode(isp);
+	dev_info(dev, "IPU6 in %s mode\n",
+		 isp->secure_mode ? "secure" : "non-secure");
+
+	ipu6_buttress_restore(isp);
+
+	ret = ipu6_buttress_ipc_reset(isp, &b->cse);
+	if (ret)
+		dev_err(&isp->pdev->dev, "IPC reset protocol failed!\n");
+
+	ret = pm_runtime_resume_and_get(&isp->psys->auxdev.dev);
+	if (ret < 0) {
+		dev_err(&isp->psys->auxdev.dev, "Failed to get runtime PM\n");
+		return 0;
+	}
+
+	ret = ipu6_buttress_authenticate(isp);
+	if (ret)
+		dev_err(&isp->pdev->dev, "FW authentication failed(%d)\n", ret);
+
+	pm_runtime_put(&isp->psys->auxdev.dev);
+
+	return 0;
+}
+
+static int ipu6_runtime_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct ipu6_device *isp = pci_get_drvdata(pdev);
+	int ret;
+
+	ipu6_configure_vc_mechanism(isp);
+	ipu6_buttress_restore(isp);
+
+	if (isp->need_ipc_reset) {
+		struct ipu6_buttress *b = &isp->buttress;
+
+		isp->need_ipc_reset = false;
+		ret = ipu6_buttress_ipc_reset(isp, &b->cse);
+		if (ret)
+			dev_err(&isp->pdev->dev, "IPC reset protocol failed\n");
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops ipu6_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(&ipu6_suspend, &ipu6_resume)
+	RUNTIME_PM_OPS(&ipu6_suspend, &ipu6_runtime_resume, NULL)
+};
+
+MODULE_DEVICE_TABLE(pci, ipu6_pci_tbl);
+
+static const struct pci_error_handlers pci_err_handlers = {
+	.reset_prepare = ipu6_pci_reset_prepare,
+	.reset_done = ipu6_pci_reset_done,
+};
+
+static struct pci_driver ipu6_pci_driver = {
+	.name = IPU6_NAME,
+	.id_table = ipu6_pci_tbl,
+	.probe = ipu6_pci_probe,
+	.remove = ipu6_pci_remove,
+	.driver = {
+		.pm = pm_ptr(&ipu6_pm_ops),
+	},
+	.err_handler = &pci_err_handlers,
+};
+
+module_pci_driver(ipu6_pci_driver);
+
+MODULE_IMPORT_NS("INTEL_IPU_BRIDGE");
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
+MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
+MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
+MODULE_AUTHOR("Qingwu Zhang <qingwu.zhang@intel.com>");
+MODULE_AUTHOR("Yunliang Ding <yunliang.ding@intel.com>");
+MODULE_AUTHOR("Hongju Wang");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Intel IPU6 PCI driver");

linux-7.2.3/drivers/media/pci/intel/ipu6/ipu6.h

@@ -0,0 +1,342 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2013 - 2024 Intel Corporation */
+
+#ifndef IPU6_H
+#define IPU6_H
+
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+
+#include "ipu6-buttress.h"
+
+struct firmware;
+struct pci_dev;
+struct ipu6_bus_device;
+
+#define IPU6_NAME			"intel-ipu6"
+#define IPU6_MEDIA_DEV_MODEL_NAME	"ipu6"
+
+#define IPU6SE_FIRMWARE_NAME		"intel/ipu/ipu6se_fw.bin"
+#define IPU6EP_FIRMWARE_NAME		"intel/ipu/ipu6ep_fw.bin"
+#define IPU6_FIRMWARE_NAME		"intel/ipu/ipu6_fw.bin"
+#define IPU6EPMTL_FIRMWARE_NAME		"intel/ipu/ipu6epmtl_fw.bin"
+#define IPU6EPADLN_FIRMWARE_NAME	"intel/ipu/ipu6epadln_fw.bin"
+
+enum ipu6_version {
+	IPU6_VER_INVALID = 0,
+	IPU6_VER_6 = 1,
+	IPU6_VER_6SE = 3,
+	IPU6_VER_6EP = 5,
+	IPU6_VER_6EP_MTL = 6,
+};
+
+/*
+ * IPU6 - TGL
+ * IPU6SE - JSL
+ * IPU6EP - ADL/RPL
+ * IPU6EP_MTL - MTL
+ */
+static inline bool is_ipu6se(u8 hw_ver)
+{
+	return hw_ver == IPU6_VER_6SE;
+}
+
+static inline bool is_ipu6ep(u8 hw_ver)
+{
+	return hw_ver == IPU6_VER_6EP;
+}
+
+static inline bool is_ipu6ep_mtl(u8 hw_ver)
+{
+	return hw_ver == IPU6_VER_6EP_MTL;
+}
+
+static inline bool is_ipu6_tgl(u8 hw_ver)
+{
+	return hw_ver == IPU6_VER_6;
+}
+
+/*
+ * ISYS DMA can overshoot. For higher resolutions over allocation is one line
+ * but it must be at minimum 1024 bytes. Value could be different in
+ * different versions / generations thus provide it via platform data.
+ */
+#define IPU6_ISYS_OVERALLOC_MIN		1024
+
+/* Physical pages in GDA is 128, page size is 2K for IPU6, 1K for others */
+#define IPU6_DEVICE_GDA_NR_PAGES		128
+
+/* Virtualization factor to calculate the available virtual pages */
+#define IPU6_DEVICE_GDA_VIRT_FACTOR	32
+
+struct ipu6_device {
+	struct pci_dev *pdev;
+	struct list_head devices;
+	struct ipu6_bus_device *isys;
+	struct ipu6_bus_device *psys;
+	struct ipu6_buttress buttress;
+
+	const struct firmware *cpd_fw;
+	const char *cpd_fw_name;
+	u32 cpd_metadata_cmpnt_size;
+
+	void __iomem *base;
+	bool need_ipc_reset;
+	bool secure_mode;
+	u8 hw_ver;
+	bool bus_ready_to_probe;
+};
+
+#define IPU6_ISYS_NAME "isys"
+#define IPU6_PSYS_NAME "psys"
+
+#define IPU6_MMU_MAX_DEVICES		4
+#define IPU6_MMU_ADDR_BITS		32
+/* The firmware is accessible within the first 2 GiB only in non-secure mode. */
+#define IPU6_MMU_ADDR_BITS_NON_SECURE	31
+
+#define IPU6_MMU_MAX_TLB_L1_STREAMS	32
+#define IPU6_MMU_MAX_TLB_L2_STREAMS	32
+#define IPU6_MAX_LI_BLOCK_ADDR		128
+#define IPU6_MAX_L2_BLOCK_ADDR		64
+
+#define IPU6SE_ISYS_NUM_STREAMS          IPU6SE_NONSECURE_STREAM_ID_MAX
+#define IPU6_ISYS_NUM_STREAMS            IPU6_NONSECURE_STREAM_ID_MAX
+
+/*
+ * To maximize the IOSF utlization, IPU6 need to send requests in bursts.
+ * At the DMA interface with the buttress, there are CDC FIFOs with burst
+ * collection capability. CDC FIFO burst collectors have a configurable
+ * threshold and is configured based on the outcome of performance measurements.
+ *
+ * isys has 3 ports with IOSF interface for VC0, VC1 and VC2
+ * psys has 4 ports with IOSF interface for VC0, VC1w, VC1r and VC2
+ *
+ * Threshold values are pre-defined and are arrived at after performance
+ * evaluations on a type of IPU6
+ */
+#define IPU6_MAX_VC_IOSF_PORTS		4
+
+/*
+ * IPU6 must configure correct arbitration mechanism related to the IOSF VC
+ * requests. There are two options per VC0 and VC1 - > 0 means rearbitrate on
+ * stall and 1 means stall until the request is completed.
+ */
+#define IPU6_BTRS_ARB_MODE_TYPE_REARB	0
+#define IPU6_BTRS_ARB_MODE_TYPE_STALL	1
+
+/* Currently chosen arbitration mechanism for VC0 */
+#define IPU6_BTRS_ARB_STALL_MODE_VC0	\
+			IPU6_BTRS_ARB_MODE_TYPE_REARB
+
+/* Currently chosen arbitration mechanism for VC1 */
+#define IPU6_BTRS_ARB_STALL_MODE_VC1	\
+			IPU6_BTRS_ARB_MODE_TYPE_REARB
+
+/*
+ * MMU Invalidation HW bug workaround by ZLW mechanism
+ *
+ * Old IPU6 MMUV2 has a bug in the invalidation mechanism which might result in
+ * wrong translation or replication of the translation. This will cause data
+ * corruption. So we cannot directly use the MMU V2 invalidation registers
+ * to invalidate the MMU. Instead, whenever an invalidate is called, we need to
+ * clear the TLB by evicting all the valid translations by filling it with trash
+ * buffer (which is guaranteed not to be used by any other processes). ZLW is
+ * used to fill the L1 and L2 caches with the trash buffer translations. ZLW
+ * or Zero length write, is pre-fetch mechanism to pre-fetch the pages in
+ * advance to the L1 and L2 caches without triggering any memory operations.
+ *
+ * In MMU V2, L1 -> 16 streams and 64 blocks, maximum 16 blocks per stream
+ * One L1 block has 16 entries, hence points to 16 * 4K pages
+ * L2 -> 16 streams and 32 blocks. 2 blocks per streams
+ * One L2 block maps to 1024 L1 entries, hence points to 4MB address range
+ * 2 blocks per L2 stream means, 1 stream points to 8MB range
+ *
+ * As we need to clear the caches and 8MB being the biggest cache size, we need
+ * to have trash buffer which points to 8MB address range. As these trash
+ * buffers are not used for any memory transactions, we need only the least
+ * amount of physical memory. So we reserve 8MB IOVA address range but only
+ * one page is reserved from physical memory. Each of this 8MB IOVA address
+ * range is then mapped to the same physical memory page.
+ */
+/* One L2 entry maps 1024 L1 entries and one L1 entry per page */
+#define IPU6_MMUV2_L2_RANGE		(1024 * PAGE_SIZE)
+/* Max L2 blocks per stream */
+#define IPU6_MMUV2_MAX_L2_BLOCKS	2
+/* Max L1 blocks per stream */
+#define IPU6_MMUV2_MAX_L1_BLOCKS	16
+#define IPU6_MMUV2_TRASH_RANGE	(IPU6_MMUV2_L2_RANGE * IPU6_MMUV2_MAX_L2_BLOCKS)
+/* Entries per L1 block */
+#define MMUV2_ENTRIES_PER_L1_BLOCK	16
+#define MMUV2_TRASH_L1_BLOCK_OFFSET	(MMUV2_ENTRIES_PER_L1_BLOCK * PAGE_SIZE)
+#define MMUV2_TRASH_L2_BLOCK_OFFSET	IPU6_MMUV2_L2_RANGE
+
+/*
+ * In some of the IPU6 MMUs, there is provision to configure L1 and L2 page
+ * table caches. Both these L1 and L2 caches are divided into multiple sections
+ * called streams. There is maximum 16 streams for both caches. Each of these
+ * sections are subdivided into multiple blocks. When nr_l1streams = 0 and
+ * nr_l2streams = 0, means the MMU is of type MMU_V1 and do not support
+ * L1/L2 page table caches.
+ *
+ * L1 stream per block sizes are configurable and varies per usecase.
+ * L2 has constant block sizes - 2 blocks per stream.
+ *
+ * MMU1 support pre-fetching of the pages to have less cache lookup misses. To
+ * enable the pre-fetching, MMU1 AT (Address Translator) device registers
+ * need to be configured.
+ *
+ * There are four types of memory accesses which requires ZLW configuration.
+ * ZLW(Zero Length Write) is a mechanism to enable VT-d pre-fetching on IOMMU.
+ *
+ * 1. Sequential Access or 1D mode
+ *	Set ZLW_EN -> 1
+ *	set ZLW_PAGE_CROSS_1D -> 1
+ *	Set ZLW_N to "N" pages so that ZLW will be inserte N pages ahead where
+ *		  N is pre-defined and hardcoded in the platform data
+ *	Set ZLW_2D -> 0
+ *
+ * 2. ZLW 2D mode
+ *	Set ZLW_EN -> 1
+ *	set ZLW_PAGE_CROSS_1D -> 1,
+ *	Set ZLW_N -> 0
+ *	Set ZLW_2D -> 1
+ *
+ * 3. ZLW Enable (no 1D or 2D mode)
+ *	Set ZLW_EN -> 1
+ *	set ZLW_PAGE_CROSS_1D -> 0,
+ *	Set ZLW_N -> 0
+ *	Set ZLW_2D -> 0
+ *
+ * 4. ZLW disable
+ *	Set ZLW_EN -> 0
+ *	set ZLW_PAGE_CROSS_1D -> 0,
+ *	Set ZLW_N -> 0
+ *	Set ZLW_2D -> 0
+ *
+ * To configure the ZLW for the above memory access, four registers are
+ * available. Hence to track these four settings, we have the following entries
+ * in the struct ipu6_mmu_hw. Each of these entries are per stream and
+ * available only for the L1 streams.
+ *
+ * a. l1_zlw_en -> To track zlw enabled per stream (ZLW_EN)
+ * b. l1_zlw_1d_mode -> Track 1D mode per stream. ZLW inserted at page boundary
+ * c. l1_ins_zlw_ahead_pages -> to track how advance the ZLW need to be inserted
+ *			Insert ZLW request N pages ahead address.
+ * d. l1_zlw_2d_mode -> To track 2D mode per stream (ZLW_2D)
+ *
+ *
+ * Currently L1/L2 streams, blocks, AT ZLW configurations etc. are pre-defined
+ * as per the usecase specific calculations. Any change to this pre-defined
+ * table has to happen in sync with IPU6 FW.
+ */
+struct ipu6_mmu_hw {
+	union {
+		unsigned long offset;
+		void __iomem *base;
+	};
+	u32 info_bits;
+	u8 nr_l1streams;
+	/*
+	 * L1 has variable blocks per stream - total of 64 blocks and maximum of
+	 * 16 blocks per stream. Configurable by using the block start address
+	 * per stream. Block start address is calculated from the block size
+	 */
+	u8 l1_block_sz[IPU6_MMU_MAX_TLB_L1_STREAMS];
+	/* Is ZLW is enabled in each stream */
+	bool l1_zlw_en[IPU6_MMU_MAX_TLB_L1_STREAMS];
+	bool l1_zlw_1d_mode[IPU6_MMU_MAX_TLB_L1_STREAMS];
+	u8 l1_ins_zlw_ahead_pages[IPU6_MMU_MAX_TLB_L1_STREAMS];
+	bool l1_zlw_2d_mode[IPU6_MMU_MAX_TLB_L1_STREAMS];
+
+	u32 l1_stream_id_reg_offset;
+	u32 l2_stream_id_reg_offset;
+
+	u8 nr_l2streams;
+	/*
+	 * L2 has fixed 2 blocks per stream. Block address is calculated
+	 * from the block size
+	 */
+	u8 l2_block_sz[IPU6_MMU_MAX_TLB_L2_STREAMS];
+	/* flag to track if WA is needed for successive invalidate HW bug */
+	bool insert_read_before_invalidate;
+};
+
+struct ipu6_mmu_pdata {
+	u32 nr_mmus;
+	struct ipu6_mmu_hw mmu_hw[IPU6_MMU_MAX_DEVICES];
+	int mmid;
+};
+
+struct ipu6_isys_csi2_pdata {
+	void __iomem *base;
+};
+
+struct ipu6_isys_internal_csi2_pdata {
+	u32 nports;
+	u32 irq_mask;
+	u32 ctrl0_irq_edge;
+	u32 ctrl0_irq_clear;
+	u32 ctrl0_irq_mask;
+	u32 ctrl0_irq_enable;
+	u32 ctrl0_irq_lnp;
+	u32 ctrl0_irq_status;
+	u32 fw_access_port_ofs;
+};
+
+struct ipu6_isys_internal_tpg_pdata {
+	u32 ntpgs;
+	u32 *offsets;
+	u32 *sels;
+};
+
+struct ipu6_hw_variants {
+	unsigned long offset;
+	u32 nr_mmus;
+	struct ipu6_mmu_hw mmu_hw[IPU6_MMU_MAX_DEVICES];
+	u8 cdc_fifos;
+	u8 cdc_fifo_threshold[IPU6_MAX_VC_IOSF_PORTS];
+	u32 dmem_offset;
+	u32 spc_offset;
+};
+
+struct ipu6_isys_internal_pdata {
+	struct ipu6_isys_internal_csi2_pdata csi2;
+	struct ipu6_hw_variants hw_variant;
+	u32 num_parallel_streams;
+	u32 isys_dma_overshoot;
+	u32 sram_gran_shift;
+	u32 sram_gran_size;
+	u32 max_sram_size;
+	u32 max_streams;
+	u32 max_send_queues;
+	u32 max_sram_blocks;
+	u32 max_devq_size;
+	u32 sensor_type_start;
+	u32 sensor_type_end;
+	u32 ltr;
+	u32 memopen_threshold;
+	bool enhanced_iwake;
+};
+
+struct ipu6_isys_pdata {
+	void __iomem *base;
+	const struct ipu6_isys_internal_pdata *ipdata;
+};
+
+struct ipu6_psys_internal_pdata {
+	struct ipu6_hw_variants hw_variant;
+};
+
+struct ipu6_psys_pdata {
+	void __iomem *base;
+	const struct ipu6_psys_internal_pdata *ipdata;
+};
+
+int ipu6_fw_authenticate(void *data, u64 val);
+void ipu6_configure_spc(struct ipu6_device *isp,
+			const struct ipu6_hw_variants *hw_variant,
+			int pkg_dir_idx, void __iomem *base, u64 *pkg_dir,
+			dma_addr_t pkg_dir_dma_addr);
+#endif /* IPU6_H */

linux-7.2.3/drivers/media/pci/intel/ivsc/Kconfig

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (C) 2023, Intel Corporation. All rights reserved.
+
+config INTEL_VSC
+	tristate "Intel Visual Sensing Controller"
+	depends on INTEL_MEI && ACPI && VIDEO_DEV
+	depends on IPU_BRIDGE || !IPU_BRIDGE
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	select V4L2_FWNODE
+	help
+	  This adds support for Intel Visual Sensing Controller (IVSC).
+
+	  The IVSC support is split into two devices, ACE (Algorithm
+	  Context Engine) and CSI (Camera Serial Interface), each of which
+	  have their own drivers. The ACE is used to select the ownership
+	  of the sensor between the IVSC and the host CPU while the CSI is
+	  used to both select the routing destination for the data the
+	  sensor transmits over the CSI-2 bus between the IVSC and the
+	  host CPU and to configure the CSI-2 bus itself.
+
+	  The modules will be called ivsc-ace and ivsc-csi.

linux-7.2.3/drivers/media/pci/intel/ivsc/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2023, Intel Corporation. All rights reserved.
+
+obj-$(CONFIG_INTEL_VSC) += ivsc-csi.o
+ivsc-csi-y += mei_csi.o
+
+obj-$(CONFIG_INTEL_VSC) += ivsc-ace.o
+ivsc-ace-y += mei_ace.o

linux-7.2.3/drivers/media/pci/intel/ivsc/mei_ace.c

@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Intel Corporation. All rights reserved.
+ * Intel Visual Sensing Controller ACE Linux driver
+ */
+
+/*
+ * To set ownership of camera sensor, there is specific command, which
+ * is sent via MEI protocol. That's a two-step scheme where the firmware
+ * first acks receipt of the command and later responses the command was
+ * executed. The command sending function uses "completion" as the
+ * synchronization mechanism. The notification for command is received
+ * via a mei callback which wakes up the caller. There can be only one
+ * outstanding command at a time.
+ *
+ * The power line of camera sensor is directly connected to IVSC instead
+ * of host, when camera sensor ownership is switched to host, sensor is
+ * already powered up by firmware.
+ */
+
+#include <linux/acpi.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/mei_cl_bus.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+#include <linux/workqueue.h>
+
+/* indicating driver message */
+#define	ACE_DRV_MSG		1
+/* indicating set command */
+#define	ACE_CMD_SET		4
+/* command timeout determined experimentally */
+#define	ACE_CMD_TIMEOUT		(5 * HZ)
+/* indicating the first command block */
+#define	ACE_CMD_INIT_BLOCK	1
+/* indicating the last command block */
+#define	ACE_CMD_FINAL_BLOCK	1
+/* size of camera status notification content */
+#define	ACE_CAMERA_STATUS_SIZE	5
+
+/* UUID used to get firmware id */
+#define ACE_GET_FW_ID_UUID UUID_LE(0x6167DCFB, 0x72F1, 0x4584, 0xBF, \
+				   0xE3, 0x84, 0x17, 0x71, 0xAA, 0x79, 0x0B)
+
+/* UUID used to get csi device */
+#define MEI_CSI_UUID UUID_LE(0x92335FCF, 0x3203, 0x4472, \
+			     0xAF, 0x93, 0x7b, 0x44, 0x53, 0xAC, 0x29, 0xDA)
+
+/* identify firmware event type */
+enum ace_event_type {
+	/* firmware ready */
+	ACE_FW_READY = 0x8,
+
+	/* command response */
+	ACE_CMD_RESPONSE = 0x10,
+};
+
+/* identify camera sensor ownership */
+enum ace_camera_owner {
+	ACE_CAMERA_IVSC,
+	ACE_CAMERA_HOST,
+};
+
+/* identify the command id supported by firmware IPC */
+enum ace_cmd_id {
+	/* used to switch camera sensor to host */
+	ACE_SWITCH_CAMERA_TO_HOST = 0x13,
+
+	/* used to switch camera sensor to IVSC */
+	ACE_SWITCH_CAMERA_TO_IVSC = 0x14,
+
+	/* used to get firmware id */
+	ACE_GET_FW_ID = 0x1A,
+};
+
+/* ACE command header structure */
+struct ace_cmd_hdr {
+	u32 firmware_id : 16;
+	u32 instance_id : 8;
+	u32 type : 5;
+	u32 rsp : 1;
+	u32 msg_tgt : 1;
+	u32 _hw_rsvd_1 : 1;
+	u32 param_size : 20;
+	u32 cmd_id : 8;
+	u32 final_block : 1;
+	u32 init_block : 1;
+	u32 _hw_rsvd_2 : 2;
+} __packed;
+
+/* ACE command parameter structure */
+union ace_cmd_param {
+	uuid_le uuid;
+	u32 param;
+};
+
+/* ACE command structure */
+struct ace_cmd {
+	struct ace_cmd_hdr hdr;
+	union ace_cmd_param param;
+} __packed;
+
+/* ACE notification header */
+union ace_notif_hdr {
+	struct _confirm {
+		u32 status : 24;
+		u32 type : 5;
+		u32 rsp : 1;
+		u32 msg_tgt : 1;
+		u32 _hw_rsvd_1 : 1;
+		u32 param_size : 20;
+		u32 cmd_id : 8;
+		u32 final_block : 1;
+		u32 init_block : 1;
+		u32 _hw_rsvd_2 : 2;
+	} __packed ack;
+
+	struct _event {
+		u32 rsvd1 : 16;
+		u32 event_type : 8;
+		u32 type : 5;
+		u32 ack : 1;
+		u32 msg_tgt : 1;
+		u32 _hw_rsvd_1 : 1;
+		u32 rsvd2 : 30;
+		u32 _hw_rsvd_2 : 2;
+	} __packed event;
+
+	struct _response {
+		u32 event_id : 16;
+		u32 notif_type : 8;
+		u32 type : 5;
+		u32 rsp : 1;
+		u32 msg_tgt : 1;
+		u32 _hw_rsvd_1 : 1;
+		u32 event_data_size : 16;
+		u32 request_target : 1;
+		u32 request_type : 5;
+		u32 cmd_id : 8;
+		u32 _hw_rsvd_2 : 2;
+	} __packed response;
+};
+
+/* ACE notification content */
+union ace_notif_cont {
+	u16 firmware_id;
+	u8 state_notif;
+	u8 camera_status[ACE_CAMERA_STATUS_SIZE];
+};
+
+/* ACE notification structure */
+struct ace_notif {
+	union ace_notif_hdr hdr;
+	union ace_notif_cont cont;
+} __packed;
+
+struct mei_ace {
+	struct mei_cl_device *cldev;
+
+	/* command ack */
+	struct ace_notif cmd_ack;
+	/* command response */
+	struct ace_notif cmd_response;
+	/* used to wait for command ack and response */
+	struct completion cmd_completion;
+	/* lock used to prevent multiple call to send command */
+	struct mutex lock;
+
+	/* used to construct command */
+	u16 firmware_id;
+
+	struct device *csi_dev;
+
+	/* runtime PM link from ace to csi */
+	struct device_link *csi_link;
+
+	struct work_struct work;
+};
+
+static inline void init_cmd_hdr(struct ace_cmd_hdr *hdr)
+{
+	memset(hdr, 0, sizeof(struct ace_cmd_hdr));
+
+	hdr->type = ACE_CMD_SET;
+	hdr->msg_tgt = ACE_DRV_MSG;
+	hdr->init_block = ACE_CMD_INIT_BLOCK;
+	hdr->final_block = ACE_CMD_FINAL_BLOCK;
+}
+
+static int construct_command(struct mei_ace *ace, struct ace_cmd *cmd,
+			     enum ace_cmd_id cmd_id)
+{
+	union ace_cmd_param *param = &cmd->param;
+	struct ace_cmd_hdr *hdr = &cmd->hdr;
+
+	init_cmd_hdr(hdr);
+
+	hdr->cmd_id = cmd_id;
+	switch (cmd_id) {
+	case ACE_GET_FW_ID:
+		param->uuid = ACE_GET_FW_ID_UUID;
+		hdr->param_size = sizeof(param->uuid);
+		break;
+	case ACE_SWITCH_CAMERA_TO_IVSC:
+		param->param = 0;
+		hdr->firmware_id = ace->firmware_id;
+		hdr->param_size = sizeof(param->param);
+		break;
+	case ACE_SWITCH_CAMERA_TO_HOST:
+		hdr->firmware_id = ace->firmware_id;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return hdr->param_size + sizeof(cmd->hdr);
+}
+
+/* send command to firmware */
+static int mei_ace_send(struct mei_ace *ace, struct ace_cmd *cmd,
+			size_t len, bool only_ack)
+{
+	union ace_notif_hdr *resp_hdr = &ace->cmd_response.hdr;
+	union ace_notif_hdr *ack_hdr = &ace->cmd_ack.hdr;
+	struct ace_cmd_hdr *cmd_hdr = &cmd->hdr;
+	int ret;
+
+	mutex_lock(&ace->lock);
+
+	reinit_completion(&ace->cmd_completion);
+
+	ret = mei_cldev_send(ace->cldev, (u8 *)cmd, len);
+	if (ret < 0)
+		goto out;
+
+	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,
+						   ACE_CMD_TIMEOUT);
+	if (ret < 0) {
+		goto out;
+	} else if (!ret) {
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	if (ack_hdr->ack.cmd_id != cmd_hdr->cmd_id) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* command ack status */
+	ret = ack_hdr->ack.status;
+	if (ret) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (only_ack)
+		goto out;
+
+	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,
+						   ACE_CMD_TIMEOUT);
+	if (ret < 0) {
+		goto out;
+	} else if (!ret) {
+		ret = -ETIMEDOUT;
+		goto out;
+	} else {
+		ret = 0;
+	}
+
+	if (resp_hdr->response.cmd_id != cmd_hdr->cmd_id)
+		ret = -EINVAL;
+
+out:
+	mutex_unlock(&ace->lock);
+
+	return ret;
+}
+
+static int ace_set_camera_owner(struct mei_ace *ace,
+				enum ace_camera_owner owner)
+{
+	enum ace_cmd_id cmd_id;
+	struct ace_cmd cmd;
+	int cmd_size;
+	int ret;
+
+	if (owner == ACE_CAMERA_IVSC)
+		cmd_id = ACE_SWITCH_CAMERA_TO_IVSC;
+	else
+		cmd_id = ACE_SWITCH_CAMERA_TO_HOST;
+
+	cmd_size = construct_command(ace, &cmd, cmd_id);
+	if (cmd_size >= 0)
+		ret = mei_ace_send(ace, &cmd, cmd_size, false);
+	else
+		ret = cmd_size;
+
+	return ret;
+}
+
+/* the first command downloaded to firmware */
+static inline int ace_get_firmware_id(struct mei_ace *ace)
+{
+	struct ace_cmd cmd;
+	int cmd_size;
+	int ret;
+
+	cmd_size = construct_command(ace, &cmd, ACE_GET_FW_ID);
+	if (cmd_size >= 0)
+		ret = mei_ace_send(ace, &cmd, cmd_size, true);
+	else
+		ret = cmd_size;
+
+	return ret;
+}
+
+static void handle_command_response(struct mei_ace *ace,
+				    struct ace_notif *resp, int len)
+{
+	union ace_notif_hdr *hdr = &resp->hdr;
+
+	switch (hdr->response.cmd_id) {
+	case ACE_SWITCH_CAMERA_TO_IVSC:
+	case ACE_SWITCH_CAMERA_TO_HOST:
+		memcpy(&ace->cmd_response, resp, len);
+		complete(&ace->cmd_completion);
+		break;
+	case ACE_GET_FW_ID:
+		break;
+	default:
+		break;
+	}
+}
+
+static void handle_command_ack(struct mei_ace *ace,
+			       struct ace_notif *ack, int len)
+{
+	union ace_notif_hdr *hdr = &ack->hdr;
+
+	switch (hdr->ack.cmd_id) {
+	case ACE_GET_FW_ID:
+		ace->firmware_id = ack->cont.firmware_id;
+		fallthrough;
+	case ACE_SWITCH_CAMERA_TO_IVSC:
+	case ACE_SWITCH_CAMERA_TO_HOST:
+		memcpy(&ace->cmd_ack, ack, len);
+		complete(&ace->cmd_completion);
+		break;
+	default:
+		break;
+	}
+}
+
+/* callback for receive */
+static void mei_ace_rx(struct mei_cl_device *cldev)
+{
+	struct mei_ace *ace = mei_cldev_get_drvdata(cldev);
+	struct ace_notif event;
+	union ace_notif_hdr *hdr = &event.hdr;
+	int ret;
+
+	ret = mei_cldev_recv(cldev, (u8 *)&event, sizeof(event));
+	if (ret < 0) {
+		dev_err(&cldev->dev, "recv error: %d\n", ret);
+		return;
+	}
+
+	if (hdr->event.ack) {
+		handle_command_ack(ace, &event, ret);
+		return;
+	}
+
+	switch (hdr->event.event_type) {
+	case ACE_CMD_RESPONSE:
+		handle_command_response(ace, &event, ret);
+		break;
+	case ACE_FW_READY:
+		/*
+		 * firmware ready notification sent to driver
+		 * after HECI client connected with firmware.
+		 */
+		dev_dbg(&cldev->dev, "firmware ready\n");
+		break;
+	default:
+		break;
+	}
+}
+
+static int mei_ace_setup_dev_link(struct mei_ace *ace)
+{
+	struct device *dev = &ace->cldev->dev;
+	uuid_le uuid = MEI_CSI_UUID;
+	struct device *csi_dev;
+	char name[64];
+	int ret;
+
+	snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev->parent), &uuid);
+
+	csi_dev = device_find_child_by_name(dev->parent, name);
+	if (!csi_dev) {
+		ret = -EPROBE_DEFER;
+		goto err;
+	} else if (!dev_fwnode(csi_dev)) {
+		ret = -EPROBE_DEFER;
+		goto err_put;
+	}
+
+	/* setup link between mei_ace and mei_csi */
+	ace->csi_link = device_link_add(csi_dev, dev, DL_FLAG_PM_RUNTIME |
+					DL_FLAG_RPM_ACTIVE | DL_FLAG_STATELESS);
+	put_device(csi_dev);
+	if (!ace->csi_link) {
+		ret = -EINVAL;
+		dev_err(dev, "failed to link to %s\n", dev_name(csi_dev));
+		goto err;
+	}
+
+	ace->csi_dev = csi_dev;
+
+	return 0;
+
+err_put:
+	put_device(csi_dev);
+
+err:
+	return ret;
+}
+
+/* switch camera to host before probe sensor device */
+static void mei_ace_post_probe_work(struct work_struct *work)
+{
+	struct acpi_device *adev;
+	struct mei_ace *ace;
+	struct device *dev;
+	int ret;
+
+	ace = container_of(work, struct mei_ace, work);
+	dev = &ace->cldev->dev;
+
+	ret = ace_set_camera_owner(ace, ACE_CAMERA_HOST);
+	if (ret) {
+		dev_err(dev, "switch camera to host failed: %d\n", ret);
+		return;
+	}
+
+	adev = ACPI_COMPANION(dev->parent);
+	if (!adev)
+		return;
+
+	acpi_dev_clear_dependencies(adev);
+}
+
+static int mei_ace_probe(struct mei_cl_device *cldev,
+			 const struct mei_cl_device_id *id)
+{
+	struct device *dev = &cldev->dev;
+	struct mei_ace *ace;
+	int ret;
+
+	ace = devm_kzalloc(dev, sizeof(struct mei_ace), GFP_KERNEL);
+	if (!ace)
+		return -ENOMEM;
+
+	ace->cldev = cldev;
+	mutex_init(&ace->lock);
+	init_completion(&ace->cmd_completion);
+	INIT_WORK(&ace->work, mei_ace_post_probe_work);
+
+	mei_cldev_set_drvdata(cldev, ace);
+
+	ret = mei_cldev_enable(cldev);
+	if (ret < 0) {
+		dev_err(dev, "mei_cldev_enable failed: %d\n", ret);
+		goto destroy_mutex;
+	}
+
+	ret = mei_cldev_register_rx_cb(cldev, mei_ace_rx);
+	if (ret) {
+		dev_err(dev, "event cb registration failed: %d\n", ret);
+		goto err_disable;
+	}
+
+	ret = ace_get_firmware_id(ace);
+	if (ret) {
+		dev_err(dev, "get firmware id failed: %d\n", ret);
+		goto err_disable;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	ret = mei_ace_setup_dev_link(ace);
+	if (ret)
+		goto disable_pm;
+
+	schedule_work(&ace->work);
+
+	return 0;
+
+disable_pm:
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+
+err_disable:
+	mei_cldev_disable(cldev);
+
+destroy_mutex:
+	mutex_destroy(&ace->lock);
+
+	return ret;
+}
+
+static void mei_ace_remove(struct mei_cl_device *cldev)
+{
+	struct mei_ace *ace = mei_cldev_get_drvdata(cldev);
+
+	cancel_work_sync(&ace->work);
+
+	device_link_del(ace->csi_link);
+
+	pm_runtime_disable(&cldev->dev);
+	pm_runtime_set_suspended(&cldev->dev);
+
+	ace_set_camera_owner(ace, ACE_CAMERA_IVSC);
+
+	mei_cldev_disable(cldev);
+
+	mutex_destroy(&ace->lock);
+}
+
+static int __maybe_unused mei_ace_runtime_suspend(struct device *dev)
+{
+	struct mei_ace *ace = dev_get_drvdata(dev);
+
+	return ace_set_camera_owner(ace, ACE_CAMERA_IVSC);
+}
+
+static int __maybe_unused mei_ace_runtime_resume(struct device *dev)
+{
+	struct mei_ace *ace = dev_get_drvdata(dev);
+
+	return ace_set_camera_owner(ace, ACE_CAMERA_HOST);
+}
+
+static const struct dev_pm_ops mei_ace_pm_ops = {
+	SET_RUNTIME_PM_OPS(mei_ace_runtime_suspend,
+			   mei_ace_runtime_resume, NULL)
+};
+
+#define MEI_ACE_UUID UUID_LE(0x5DB76CF6, 0x0A68, 0x4ED6, \
+			     0x9B, 0x78, 0x03, 0x61, 0x63, 0x5E, 0x24, 0x47)
+
+static const struct mei_cl_device_id mei_ace_tbl[] = {
+	{ .uuid = MEI_ACE_UUID, .version = MEI_CL_VERSION_ANY },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(mei, mei_ace_tbl);
+
+static struct mei_cl_driver mei_ace_driver = {
+	.id_table = mei_ace_tbl,
+	.name = KBUILD_MODNAME,
+
+	.probe = mei_ace_probe,
+	.remove = mei_ace_remove,
+
+	.driver = {
+		.pm = &mei_ace_pm_ops,
+	},
+};
+
+module_mei_cl_driver(mei_ace_driver);
+
+MODULE_AUTHOR("Wentong Wu");
+MODULE_AUTHOR("Zhifeng Wang <zhifeng.wang@intel.com>");
+MODULE_DESCRIPTION("Device driver for IVSC ACE");
+MODULE_LICENSE("GPL");

linux-7.2.3/drivers/media/pci/intel/ivsc/mei_csi.c

@@ -0,0 +1,791 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Intel Corporation. All rights reserved.
+ * Intel Visual Sensing Controller CSI Linux driver
+ */
+
+/*
+ * To set ownership of CSI-2 link and to configure CSI-2 link, there
+ * are specific commands, which are sent via MEI protocol. The send
+ * command function uses "completion" as a synchronization mechanism.
+ * The response for command is received via a mei callback which wakes
+ * up the caller. There can be only one outstanding command at a time.
+ */
+
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/mei_cl_bus.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/units.h>
+#include <linux/uuid.h>
+#include <linux/workqueue.h>
+
+#include <media/ipu-bridge.h>
+#include <media/ipu6-pci-table.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define MEI_CSI_ENTITY_NAME "Intel IVSC CSI"
+
+/* the 5s used here is based on experiment */
+#define CSI_CMD_TIMEOUT (5 * HZ)
+/* to setup CSI-2 link an extra delay needed and determined experimentally */
+#define CSI_FW_READY_DELAY_MS 100
+/* link frequency unit is 100kHz */
+#define CSI_LINK_FREQ(x) ((u32)(div_u64(x, 100 * HZ_PER_KHZ)))
+
+/*
+ * identify the command id supported by firmware
+ * IPC, as well as the privacy notification id
+ * used when processing privacy event.
+ */
+enum csi_cmd_id {
+	/* used to set csi ownership */
+	CSI_SET_OWNER = 0,
+
+	/* used to configure CSI-2 link */
+	CSI_SET_CONF = 2,
+
+	/* privacy notification id used when privacy state changes */
+	CSI_PRIVACY_NOTIF = 6,
+};
+
+/* CSI-2 link ownership definition */
+enum csi_link_owner {
+	CSI_LINK_IVSC,
+	CSI_LINK_HOST,
+};
+
+/* privacy status definition */
+enum ivsc_privacy_status {
+	CSI_PRIVACY_OFF,
+	CSI_PRIVACY_ON,
+	CSI_PRIVACY_MAX,
+};
+
+enum csi_pads {
+	CSI_PAD_SINK,
+	CSI_PAD_SOURCE,
+	CSI_NUM_PADS
+};
+
+/* configuration of the CSI-2 link between host and IVSC */
+struct csi_link_cfg {
+	/* number of data lanes used on the CSI-2 link */
+	u32 nr_of_lanes;
+
+	/* frequency of the CSI-2 link */
+	u32 link_freq;
+
+	/* for future use */
+	u32 rsvd[2];
+} __packed;
+
+/* CSI command structure */
+struct csi_cmd {
+	u32 cmd_id;
+	union _cmd_param {
+		u32 param;
+		struct csi_link_cfg conf;
+	} param;
+} __packed;
+
+/* CSI notification structure */
+struct csi_notif {
+	u32 cmd_id;
+	int status;
+	union _resp_cont {
+		u32 cont;
+		struct csi_link_cfg conf;
+	} cont;
+} __packed;
+
+struct mei_csi {
+	struct mei_cl_device *cldev;
+
+	/* command response */
+	struct csi_notif cmd_response;
+	/* used to wait for command response from firmware */
+	struct completion cmd_completion;
+	/* protect command download */
+	struct mutex lock;
+
+	struct v4l2_subdev subdev;
+	struct media_pad *remote;
+	struct v4l2_async_notifier notifier;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl *freq_ctrl;
+	struct v4l2_ctrl *privacy_ctrl;
+	/* lock for v4l2 controls */
+	struct mutex ctrl_lock;
+	/* start streaming or not */
+	int streaming;
+
+	struct media_pad pads[CSI_NUM_PADS];
+
+	/* number of data lanes used on the CSI-2 link */
+	u32 nr_of_lanes;
+	/* frequency of the CSI-2 link */
+	u64 link_freq;
+};
+
+static const struct v4l2_mbus_framefmt mei_csi_format_mbus_default = {
+	.width = 1,
+	.height = 1,
+	.code = MEDIA_BUS_FMT_Y8_1X8,
+	.field = V4L2_FIELD_NONE,
+};
+
+static inline struct mei_csi *notifier_to_csi(struct v4l2_async_notifier *n)
+{
+	return container_of(n, struct mei_csi, notifier);
+}
+
+static inline struct mei_csi *sd_to_csi(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct mei_csi, subdev);
+}
+
+/* send a command to firmware and mutex must be held by caller */
+static int mei_csi_send(struct mei_csi *csi, u8 *buf, size_t len)
+{
+	struct csi_cmd *cmd = (struct csi_cmd *)buf;
+	int ret;
+
+	reinit_completion(&csi->cmd_completion);
+
+	ret = mei_cldev_send(csi->cldev, buf, len);
+	if (ret < 0)
+		goto out;
+
+	ret = wait_for_completion_killable_timeout(&csi->cmd_completion,
+						   CSI_CMD_TIMEOUT);
+	if (ret < 0) {
+		goto out;
+	} else if (!ret) {
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	/* command response status */
+	ret = csi->cmd_response.status;
+	if (ret == -1) {
+		/* notify privacy on instead of reporting error */
+		ret = 0;
+		v4l2_ctrl_s_ctrl(csi->privacy_ctrl, 1);
+	} else if (ret) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (csi->cmd_response.cmd_id != cmd->cmd_id)
+		ret = -EINVAL;
+
+out:
+	return ret;
+}
+
+/* set CSI-2 link ownership */
+static int csi_set_link_owner(struct mei_csi *csi, enum csi_link_owner owner)
+{
+	struct csi_cmd cmd = { 0 };
+	size_t cmd_size;
+	int ret;
+
+	cmd.cmd_id = CSI_SET_OWNER;
+	cmd.param.param = owner;
+	cmd_size = sizeof(cmd.cmd_id) + sizeof(cmd.param.param);
+
+	mutex_lock(&csi->lock);
+
+	ret = mei_csi_send(csi, (u8 *)&cmd, cmd_size);
+
+	mutex_unlock(&csi->lock);
+
+	return ret;
+}
+
+/* configure CSI-2 link between host and IVSC */
+static int csi_set_link_cfg(struct mei_csi *csi)
+{
+	struct csi_cmd cmd = { 0 };
+	size_t cmd_size;
+	int ret;
+
+	cmd.cmd_id = CSI_SET_CONF;
+	cmd.param.conf.nr_of_lanes = csi->nr_of_lanes;
+	cmd.param.conf.link_freq = CSI_LINK_FREQ(csi->link_freq);
+	cmd_size = sizeof(cmd.cmd_id) + sizeof(cmd.param.conf);
+
+	mutex_lock(&csi->lock);
+
+	ret = mei_csi_send(csi, (u8 *)&cmd, cmd_size);
+	/*
+	 * wait configuration ready if download success. placing
+	 * delay under mutex is to make sure current command flow
+	 * completed before starting a possible new one.
+	 */
+	if (!ret)
+		msleep(CSI_FW_READY_DELAY_MS);
+
+	mutex_unlock(&csi->lock);
+
+	return ret;
+}
+
+/* callback for receive */
+static void mei_csi_rx(struct mei_cl_device *cldev)
+{
+	struct mei_csi *csi = mei_cldev_get_drvdata(cldev);
+	struct csi_notif notif = { 0 };
+	int ret;
+
+	ret = mei_cldev_recv(cldev, (u8 *)&notif, sizeof(notif));
+	if (ret < 0) {
+		dev_err(&cldev->dev, "recv error: %d\n", ret);
+		return;
+	}
+
+	switch (notif.cmd_id) {
+	case CSI_PRIVACY_NOTIF:
+		if (notif.cont.cont < CSI_PRIVACY_MAX)
+			v4l2_ctrl_s_ctrl(csi->privacy_ctrl,
+					 notif.cont.cont == CSI_PRIVACY_ON);
+		break;
+	case CSI_SET_OWNER:
+	case CSI_SET_CONF:
+		memcpy(&csi->cmd_response, &notif, ret);
+
+		complete(&csi->cmd_completion);
+		break;
+	default:
+		break;
+	}
+}
+
+static int mei_csi_set_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct mei_csi *csi = sd_to_csi(sd);
+	struct v4l2_subdev *remote_sd =
+		media_entity_to_v4l2_subdev(csi->remote->entity);
+	s64 freq;
+	int ret;
+
+	if (enable && csi->streaming == 0) {
+		freq = v4l2_get_link_freq(csi->remote, 0, 0);
+		if (freq < 0) {
+			dev_err(&csi->cldev->dev,
+				"error %lld, invalid link_freq\n", freq);
+			ret = freq;
+			goto err;
+		}
+		csi->link_freq = freq;
+
+		/* switch CSI-2 link to host */
+		ret = csi_set_link_owner(csi, CSI_LINK_HOST);
+		if (ret < 0)
+			goto err;
+
+		/* configure CSI-2 link */
+		ret = csi_set_link_cfg(csi);
+		if (ret < 0)
+			goto err_switch;
+
+		ret = v4l2_subdev_call(remote_sd, video, s_stream, 1);
+		if (ret)
+			goto err_switch;
+	} else if (!enable && csi->streaming == 1) {
+		v4l2_subdev_call(remote_sd, video, s_stream, 0);
+
+		/* switch CSI-2 link to IVSC */
+		ret = csi_set_link_owner(csi, CSI_LINK_IVSC);
+		if (ret < 0)
+			dev_warn(&csi->cldev->dev,
+				 "failed to switch CSI2 link: %d\n", ret);
+	}
+
+	csi->streaming = enable;
+
+	return 0;
+
+err_switch:
+	csi_set_link_owner(csi, CSI_LINK_IVSC);
+
+err:
+	return ret;
+}
+
+static int mei_csi_init_state(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *sd_state)
+{
+	struct v4l2_mbus_framefmt *mbusformat;
+	unsigned int i;
+
+	for (i = 0; i < sd->entity.num_pads; i++) {
+		mbusformat = v4l2_subdev_state_get_format(sd_state, i);
+		*mbusformat = mei_csi_format_mbus_default;
+	}
+
+	return 0;
+}
+
+static int mei_csi_set_fmt(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_state *sd_state,
+			   struct v4l2_subdev_format *format)
+{
+	struct v4l2_mbus_framefmt *source_fmt;
+	struct v4l2_mbus_framefmt *sink_fmt;
+
+	sink_fmt = v4l2_subdev_state_get_format(sd_state, CSI_PAD_SINK);
+	source_fmt = v4l2_subdev_state_get_format(sd_state, CSI_PAD_SOURCE);
+
+	if (format->pad) {
+		*source_fmt = *sink_fmt;
+
+		return 0;
+	}
+
+	v4l_bound_align_image(&format->format.width, 1, 65536, 0,
+			      &format->format.height, 1, 65536, 0, 0);
+
+	switch (format->format.code) {
+	case MEDIA_BUS_FMT_RGB444_1X12:
+	case MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE:
+	case MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE:
+	case MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE:
+	case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
+	case MEDIA_BUS_FMT_RGB565_1X16:
+	case MEDIA_BUS_FMT_BGR565_2X8_BE:
+	case MEDIA_BUS_FMT_BGR565_2X8_LE:
+	case MEDIA_BUS_FMT_RGB565_2X8_BE:
+	case MEDIA_BUS_FMT_RGB565_2X8_LE:
+	case MEDIA_BUS_FMT_RGB666_1X18:
+	case MEDIA_BUS_FMT_RBG888_1X24:
+	case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+	case MEDIA_BUS_FMT_BGR888_1X24:
+	case MEDIA_BUS_FMT_GBR888_1X24:
+	case MEDIA_BUS_FMT_RGB888_1X24:
+	case MEDIA_BUS_FMT_RGB888_2X12_BE:
+	case MEDIA_BUS_FMT_RGB888_2X12_LE:
+	case MEDIA_BUS_FMT_ARGB8888_1X32:
+	case MEDIA_BUS_FMT_RGB888_1X32_PADHI:
+	case MEDIA_BUS_FMT_RGB101010_1X30:
+	case MEDIA_BUS_FMT_RGB121212_1X36:
+	case MEDIA_BUS_FMT_RGB161616_1X48:
+	case MEDIA_BUS_FMT_Y8_1X8:
+	case MEDIA_BUS_FMT_UV8_1X8:
+	case MEDIA_BUS_FMT_UYVY8_1_5X8:
+	case MEDIA_BUS_FMT_VYUY8_1_5X8:
+	case MEDIA_BUS_FMT_YUYV8_1_5X8:
+	case MEDIA_BUS_FMT_YVYU8_1_5X8:
+	case MEDIA_BUS_FMT_UYVY8_2X8:
+	case MEDIA_BUS_FMT_VYUY8_2X8:
+	case MEDIA_BUS_FMT_YUYV8_2X8:
+	case MEDIA_BUS_FMT_YVYU8_2X8:
+	case MEDIA_BUS_FMT_Y10_1X10:
+	case MEDIA_BUS_FMT_UYVY10_2X10:
+	case MEDIA_BUS_FMT_VYUY10_2X10:
+	case MEDIA_BUS_FMT_YUYV10_2X10:
+	case MEDIA_BUS_FMT_YVYU10_2X10:
+	case MEDIA_BUS_FMT_Y12_1X12:
+	case MEDIA_BUS_FMT_UYVY12_2X12:
+	case MEDIA_BUS_FMT_VYUY12_2X12:
+	case MEDIA_BUS_FMT_YUYV12_2X12:
+	case MEDIA_BUS_FMT_YVYU12_2X12:
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_VYUY8_1X16:
+	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_YVYU8_1X16:
+	case MEDIA_BUS_FMT_YDYUYDYV8_1X16:
+	case MEDIA_BUS_FMT_UYVY10_1X20:
+	case MEDIA_BUS_FMT_VYUY10_1X20:
+	case MEDIA_BUS_FMT_YUYV10_1X20:
+	case MEDIA_BUS_FMT_YVYU10_1X20:
+	case MEDIA_BUS_FMT_VUY8_1X24:
+	case MEDIA_BUS_FMT_YUV8_1X24:
+	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+	case MEDIA_BUS_FMT_UYVY12_1X24:
+	case MEDIA_BUS_FMT_VYUY12_1X24:
+	case MEDIA_BUS_FMT_YUYV12_1X24:
+	case MEDIA_BUS_FMT_YVYU12_1X24:
+	case MEDIA_BUS_FMT_YUV10_1X30:
+	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+	case MEDIA_BUS_FMT_AYUV8_1X32:
+	case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+	case MEDIA_BUS_FMT_YUV12_1X36:
+	case MEDIA_BUS_FMT_YUV16_1X48:
+	case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+	case MEDIA_BUS_FMT_JPEG_1X8:
+	case MEDIA_BUS_FMT_AHSV8888_1X32:
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+	case MEDIA_BUS_FMT_SBGGR14_1X14:
+	case MEDIA_BUS_FMT_SGBRG14_1X14:
+	case MEDIA_BUS_FMT_SGRBG14_1X14:
+	case MEDIA_BUS_FMT_SRGGB14_1X14:
+	case MEDIA_BUS_FMT_SBGGR16_1X16:
+	case MEDIA_BUS_FMT_SGBRG16_1X16:
+	case MEDIA_BUS_FMT_SGRBG16_1X16:
+	case MEDIA_BUS_FMT_SRGGB16_1X16:
+		break;
+	default:
+		format->format.code = MEDIA_BUS_FMT_Y8_1X8;
+		break;
+	}
+
+	if (format->format.field == V4L2_FIELD_ANY)
+		format->format.field = V4L2_FIELD_NONE;
+
+	*sink_fmt = format->format;
+	*source_fmt = *sink_fmt;
+
+	return 0;
+}
+
+static int mei_csi_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
+				   struct v4l2_mbus_config *mbus_config)
+{
+	struct mei_csi *csi = sd_to_csi(sd);
+	unsigned int i;
+	s64 freq;
+
+	mbus_config->type = V4L2_MBUS_CSI2_DPHY;
+	for (i = 0; i < V4L2_MBUS_CSI2_MAX_DATA_LANES; i++)
+		mbus_config->bus.mipi_csi2.data_lanes[i] = i + 1;
+	mbus_config->bus.mipi_csi2.num_data_lanes = csi->nr_of_lanes;
+
+	freq = v4l2_get_link_freq(csi->remote, 0, 0);
+	if (freq < 0) {
+		dev_err(&csi->cldev->dev,
+			"error %lld, invalid link_freq\n", freq);
+		return -EINVAL;
+	}
+
+	csi->link_freq = freq;
+	mbus_config->link_freq = freq;
+
+	return 0;
+}
+
+static const struct v4l2_subdev_video_ops mei_csi_video_ops = {
+	.s_stream = mei_csi_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops mei_csi_pad_ops = {
+	.get_fmt = v4l2_subdev_get_fmt,
+	.set_fmt = mei_csi_set_fmt,
+	.get_mbus_config = mei_csi_get_mbus_config,
+};
+
+static const struct v4l2_subdev_ops mei_csi_subdev_ops = {
+	.video = &mei_csi_video_ops,
+	.pad = &mei_csi_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops mei_csi_internal_ops = {
+	.init_state = mei_csi_init_state,
+};
+
+static const struct media_entity_operations mei_csi_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+static int mei_csi_notify_bound(struct v4l2_async_notifier *notifier,
+				struct v4l2_subdev *subdev,
+				struct v4l2_async_connection *asd)
+{
+	struct mei_csi *csi = notifier_to_csi(notifier);
+	int pad;
+
+	pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode,
+					  MEDIA_PAD_FL_SOURCE);
+	if (pad < 0)
+		return pad;
+
+	csi->remote = &subdev->entity.pads[pad];
+
+	return media_create_pad_link(&subdev->entity, pad,
+				     &csi->subdev.entity, CSI_PAD_SINK,
+				     MEDIA_LNK_FL_ENABLED |
+				     MEDIA_LNK_FL_IMMUTABLE);
+}
+
+static void mei_csi_notify_unbind(struct v4l2_async_notifier *notifier,
+				  struct v4l2_subdev *subdev,
+				  struct v4l2_async_connection *asd)
+{
+	struct mei_csi *csi = notifier_to_csi(notifier);
+
+	csi->remote = NULL;
+}
+
+static const struct v4l2_async_notifier_operations mei_csi_notify_ops = {
+	.bound = mei_csi_notify_bound,
+	.unbind = mei_csi_notify_unbind,
+};
+
+static int mei_csi_init_controls(struct mei_csi *csi)
+{
+	int ret;
+
+	mutex_init(&csi->ctrl_lock);
+
+	ret = v4l2_ctrl_handler_init(&csi->ctrl_handler, 1);
+	if (ret)
+		return ret;
+
+	csi->ctrl_handler.lock = &csi->ctrl_lock;
+
+	csi->privacy_ctrl = v4l2_ctrl_new_std(&csi->ctrl_handler, NULL,
+					      V4L2_CID_PRIVACY, 0, 1, 1, 0);
+	if (csi->privacy_ctrl)
+		csi->privacy_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	if (csi->ctrl_handler.error)
+		return csi->ctrl_handler.error;
+
+	csi->subdev.ctrl_handler = &csi->ctrl_handler;
+
+	return 0;
+}
+
+static int mei_csi_parse_firmware(struct mei_csi *csi)
+{
+	struct v4l2_fwnode_endpoint v4l2_ep = {
+		.bus_type = V4L2_MBUS_CSI2_DPHY,
+	};
+	struct device *dev = &csi->cldev->dev;
+	struct v4l2_async_connection *asd;
+	struct fwnode_handle *sink_ep, *source_ep;
+	int ret;
+
+	sink_ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
+	if (!sink_ep) {
+		dev_err(dev, "can't obtain sink endpoint\n");
+		return -EINVAL;
+	}
+
+	v4l2_async_subdev_nf_init(&csi->notifier, &csi->subdev);
+	csi->notifier.ops = &mei_csi_notify_ops;
+
+	ret = v4l2_fwnode_endpoint_parse(sink_ep, &v4l2_ep);
+	if (ret) {
+		dev_err(dev, "could not parse v4l2 sink endpoint\n");
+		goto out_nf_cleanup;
+	}
+
+	csi->nr_of_lanes = v4l2_ep.bus.mipi_csi2.num_data_lanes;
+
+	source_ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 1, 0, 0);
+	if (!source_ep) {
+		ret = -ENOTCONN;
+		dev_err(dev, "can't obtain source endpoint\n");
+		goto out_nf_cleanup;
+	}
+
+	ret = v4l2_fwnode_endpoint_parse(source_ep, &v4l2_ep);
+	fwnode_handle_put(source_ep);
+	if (ret) {
+		dev_err(dev, "could not parse v4l2 source endpoint\n");
+		goto out_nf_cleanup;
+	}
+
+	if (csi->nr_of_lanes != v4l2_ep.bus.mipi_csi2.num_data_lanes) {
+		ret = -EINVAL;
+		dev_err(dev,
+			"the number of lanes does not match (%u vs. %u)\n",
+			csi->nr_of_lanes, v4l2_ep.bus.mipi_csi2.num_data_lanes);
+		goto out_nf_cleanup;
+	}
+
+	asd = v4l2_async_nf_add_fwnode_remote(&csi->notifier, sink_ep,
+					      struct v4l2_async_connection);
+	if (IS_ERR(asd)) {
+		ret = PTR_ERR(asd);
+		goto out_nf_cleanup;
+	}
+
+	ret = v4l2_async_nf_register(&csi->notifier);
+	if (ret)
+		goto out_nf_cleanup;
+
+	fwnode_handle_put(sink_ep);
+
+	return 0;
+
+out_nf_cleanup:
+	v4l2_async_nf_cleanup(&csi->notifier);
+	fwnode_handle_put(sink_ep);
+
+	return ret;
+}
+
+static int mei_csi_probe(struct mei_cl_device *cldev,
+			 const struct mei_cl_device_id *id)
+{
+	struct device *dev = &cldev->dev;
+	struct pci_dev *ipu;
+	struct mei_csi *csi;
+	unsigned int i;
+	int ret;
+
+	for (i = 0, ipu = NULL; !ipu && ipu6_pci_tbl[i].vendor; i++)
+		ipu = pci_get_device(ipu6_pci_tbl[i].vendor,
+				     ipu6_pci_tbl[i].device, NULL);
+
+	if (!ipu)
+		return -ENODEV;
+
+	ret = ipu_bridge_init(&ipu->dev, ipu_bridge_parse_ssdb);
+	put_device(&ipu->dev);
+	if (ret < 0)
+		return ret;
+	if (!dev_fwnode(dev)) {
+		dev_err(dev, "mei-csi probed without device fwnode!\n");
+		return -ENXIO;
+	}
+
+	csi = devm_kzalloc(dev, sizeof(struct mei_csi), GFP_KERNEL);
+	if (!csi)
+		return -ENOMEM;
+
+	csi->cldev = cldev;
+	mutex_init(&csi->lock);
+	init_completion(&csi->cmd_completion);
+
+	mei_cldev_set_drvdata(cldev, csi);
+
+	ret = mei_cldev_enable(cldev);
+	if (ret < 0) {
+		dev_err(dev, "mei_cldev_enable failed: %d\n", ret);
+		goto destroy_mutex;
+	}
+
+	ret = mei_cldev_register_rx_cb(cldev, mei_csi_rx);
+	if (ret) {
+		dev_err(dev, "event cb registration failed: %d\n", ret);
+		goto err_disable;
+	}
+
+	ret = mei_csi_parse_firmware(csi);
+	if (ret)
+		goto err_disable;
+
+	csi->subdev.dev = &cldev->dev;
+	csi->subdev.state_lock = &csi->lock;
+	v4l2_subdev_init(&csi->subdev, &mei_csi_subdev_ops);
+	csi->subdev.internal_ops = &mei_csi_internal_ops;
+	v4l2_set_subdevdata(&csi->subdev, csi);
+	csi->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE |
+			    V4L2_SUBDEV_FL_HAS_EVENTS;
+	csi->subdev.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+	csi->subdev.entity.ops = &mei_csi_entity_ops;
+
+	snprintf(csi->subdev.name, sizeof(csi->subdev.name),
+		 MEI_CSI_ENTITY_NAME);
+
+	ret = mei_csi_init_controls(csi);
+	if (ret)
+		goto err_ctrl_handler;
+
+	csi->pads[CSI_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+	csi->pads[CSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&csi->subdev.entity, CSI_NUM_PADS,
+				     csi->pads);
+	if (ret)
+		goto err_ctrl_handler;
+
+	ret = v4l2_subdev_init_finalize(&csi->subdev);
+	if (ret < 0)
+		goto err_entity;
+
+	ret = v4l2_async_register_subdev(&csi->subdev);
+	if (ret < 0)
+		goto err_subdev;
+
+	pm_runtime_enable(&cldev->dev);
+
+	return 0;
+
+err_subdev:
+	v4l2_subdev_cleanup(&csi->subdev);
+
+err_entity:
+	media_entity_cleanup(&csi->subdev.entity);
+
+err_ctrl_handler:
+	v4l2_ctrl_handler_free(&csi->ctrl_handler);
+	mutex_destroy(&csi->ctrl_lock);
+	v4l2_async_nf_unregister(&csi->notifier);
+	v4l2_async_nf_cleanup(&csi->notifier);
+
+err_disable:
+	mei_cldev_disable(cldev);
+
+destroy_mutex:
+	mutex_destroy(&csi->lock);
+
+	return ret;
+}
+
+static void mei_csi_remove(struct mei_cl_device *cldev)
+{
+	struct mei_csi *csi = mei_cldev_get_drvdata(cldev);
+
+	v4l2_async_nf_unregister(&csi->notifier);
+	v4l2_async_nf_cleanup(&csi->notifier);
+	v4l2_ctrl_handler_free(&csi->ctrl_handler);
+	mutex_destroy(&csi->ctrl_lock);
+	v4l2_async_unregister_subdev(&csi->subdev);
+	v4l2_subdev_cleanup(&csi->subdev);
+	media_entity_cleanup(&csi->subdev.entity);
+
+	pm_runtime_disable(&cldev->dev);
+
+	mei_cldev_disable(cldev);
+
+	mutex_destroy(&csi->lock);
+}
+
+#define MEI_CSI_UUID UUID_LE(0x92335FCF, 0x3203, 0x4472, \
+			     0xAF, 0x93, 0x7b, 0x44, 0x53, 0xAC, 0x29, 0xDA)
+
+static const struct mei_cl_device_id mei_csi_tbl[] = {
+	{ .uuid = MEI_CSI_UUID, .version = MEI_CL_VERSION_ANY },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(mei, mei_csi_tbl);
+
+static struct mei_cl_driver mei_csi_driver = {
+	.id_table = mei_csi_tbl,
+	.name = KBUILD_MODNAME,
+
+	.probe = mei_csi_probe,
+	.remove = mei_csi_remove,
+};
+
+module_mei_cl_driver(mei_csi_driver);
+
+MODULE_IMPORT_NS("INTEL_IPU_BRIDGE");
+MODULE_AUTHOR("Wentong Wu");
+MODULE_AUTHOR("Zhifeng Wang <zhifeng.wang@intel.com>");
+MODULE_DESCRIPTION("Device driver for IVSC CSI");
+MODULE_LICENSE("GPL");