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linux-7.2.3/drivers/gpu/drm/hisilicon/Kconfig

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# hisilicon drm device configuration.
+# Please keep this list sorted alphabetically
+
+source "drivers/gpu/drm/hisilicon/hibmc/Kconfig"
+source "drivers/gpu/drm/hisilicon/kirin/Kconfig"

linux-7.2.3/drivers/gpu/drm/hisilicon/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for hisilicon drm drivers.
+# Please keep this list sorted alphabetically
+
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc/
+obj-$(CONFIG_DRM_HISI_KIRIN) += kirin/

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/Kconfig

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_HISI_HIBMC
+	tristate "DRM Support for Hisilicon Hibmc"
+	depends on DRM && PCI
+	select DRM_CLIENT_SELECTION
+	select DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
+	select DRM_KMS_HELPER
+	select DRM_VRAM_HELPER
+	select DRM_TTM
+	select DRM_TTM_HELPER
+	select I2C
+	select I2C_ALGOBIT
+	help
+	  Choose this option if you have a Hisilicon Hibmc soc chipset.
+	  If M is selected the module will be called hibmc-drm.

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/Makefile

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_i2c.o \
+	       dp/dp_aux.o dp/dp_link.o dp/dp_hw.o dp/dp_serdes.o hibmc_drm_dp.o \
+	       hibmc_drm_debugfs.o
+
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c

@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/minmax.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include "dp_comm.h"
+#include "dp_reg.h"
+#include "dp_hw.h"
+
+#define HIBMC_AUX_CMD_REQ_LEN		GENMASK(7, 4)
+#define HIBMC_AUX_CMD_ADDR		GENMASK(27, 8)
+#define HIBMC_AUX_CMD_I2C_ADDR_ONLY	BIT(28)
+#define HIBMC_BYTES_IN_U32		4
+#define HIBMC_AUX_I2C_WRITE_SUCCESS	0x1
+#define HIBMC_DP_MIN_PULSE_NUM		0x9
+#define BITS_IN_U8			8
+
+static inline void hibmc_dp_aux_reset(struct hibmc_dp_dev *dp)
+{
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_RST_CTRL, HIBMC_DP_CFG_AUX_RST_N, 0x0);
+	usleep_range(10, 15);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_RST_CTRL, HIBMC_DP_CFG_AUX_RST_N, 0x1);
+}
+
+static void hibmc_dp_aux_read_data(struct hibmc_dp_dev *dp, u8 *buf, u8 size)
+{
+	u32 reg_num;
+	u32 value;
+	u32 num;
+	u8 i, j;
+
+	reg_num = DIV_ROUND_UP(size, HIBMC_BYTES_IN_U32);
+	for (i = 0; i < reg_num; i++) {
+		/* number of bytes read from a single register */
+		num = min(size - i * HIBMC_BYTES_IN_U32, HIBMC_BYTES_IN_U32);
+		value = readl(dp->base + HIBMC_DP_AUX_RD_DATA0 + i * HIBMC_BYTES_IN_U32);
+		/* convert the 32-bit value of the register to the buffer. */
+		for (j = 0; j < num; j++)
+			buf[i * HIBMC_BYTES_IN_U32 + j] = value >> (j * BITS_IN_U8);
+	}
+}
+
+static void hibmc_dp_aux_write_data(struct hibmc_dp_dev *dp, u8 *buf, u8 size)
+{
+	u32 reg_num;
+	u32 value;
+	u32 num;
+	u8 i, j;
+
+	reg_num = DIV_ROUND_UP(size, HIBMC_BYTES_IN_U32);
+	for (i = 0; i < reg_num; i++) {
+		/* number of bytes written to a single register */
+		num = min_t(u8, size - i * HIBMC_BYTES_IN_U32, HIBMC_BYTES_IN_U32);
+		value = 0;
+		/* obtain the 32-bit value written to a single register. */
+		for (j = 0; j < num; j++)
+			value |= buf[i * HIBMC_BYTES_IN_U32 + j] << (j * BITS_IN_U8);
+		/* writing data to a single register */
+		writel(value, dp->base + HIBMC_DP_AUX_WR_DATA0 + i * HIBMC_BYTES_IN_U32);
+	}
+}
+
+static u32 hibmc_dp_aux_build_cmd(const struct drm_dp_aux_msg *msg)
+{
+	u32 aux_cmd = msg->request;
+
+	if (msg->size)
+		aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_REQ_LEN, (msg->size - 1));
+	else
+		aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_I2C_ADDR_ONLY, 1);
+
+	aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_ADDR, msg->address);
+
+	return aux_cmd;
+}
+
+/* ret >= 0, ret is size; ret < 0, ret is err code */
+static int hibmc_dp_aux_parse_xfer(struct hibmc_dp_dev *dp, struct drm_dp_aux_msg *msg)
+{
+	u32 buf_data_cnt;
+	u32 aux_status;
+
+	aux_status = readl(dp->base + HIBMC_DP_AUX_STATUS);
+	msg->reply = FIELD_GET(HIBMC_DP_CFG_AUX_STATUS, aux_status);
+
+	if (aux_status & HIBMC_DP_CFG_AUX_TIMEOUT)
+		return -ETIMEDOUT;
+
+	/* only address */
+	if (!msg->size)
+		return 0;
+
+	if (msg->reply != DP_AUX_NATIVE_REPLY_ACK)
+		return -EIO;
+
+	buf_data_cnt = FIELD_GET(HIBMC_DP_CFG_AUX_READY_DATA_BYTE, aux_status);
+
+	switch (msg->request) {
+	case DP_AUX_NATIVE_WRITE:
+		return msg->size;
+	case DP_AUX_I2C_WRITE | DP_AUX_I2C_MOT:
+		if (buf_data_cnt == HIBMC_AUX_I2C_WRITE_SUCCESS)
+			return msg->size;
+		else
+			return FIELD_GET(HIBMC_DP_CFG_AUX, aux_status);
+	case DP_AUX_NATIVE_READ:
+	case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
+		buf_data_cnt--;
+		if (buf_data_cnt != msg->size) {
+			/* only the successful part of data is read */
+			return -EBUSY;
+		}
+
+		/* all data is successfully read */
+		hibmc_dp_aux_read_data(dp, msg->buffer, msg->size);
+		return msg->size;
+	default:
+		return -EINVAL;
+	}
+}
+
+/* ret >= 0 ,ret is size; ret < 0, ret is err code */
+static ssize_t hibmc_dp_aux_xfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
+{
+	struct hibmc_dp *dp_priv = container_of(aux, struct hibmc_dp, aux);
+	struct hibmc_dp_dev *dp = dp_priv->dp_dev;
+	u32 aux_cmd;
+	int ret;
+	u32 val; /* val will be assigned at the beginning of readl_poll_timeout function */
+
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA0);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA1);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA2);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA3);
+
+	hibmc_dp_aux_write_data(dp, msg->buffer, msg->size);
+
+	aux_cmd = hibmc_dp_aux_build_cmd(msg);
+	writel(aux_cmd, dp->base + HIBMC_DP_AUX_CMD_ADDR);
+
+	/* enable aux transfer */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_REQ, 0x1);
+	ret = readl_poll_timeout(dp->base + HIBMC_DP_AUX_REQ, val,
+				 !(val & HIBMC_DP_CFG_AUX_REQ), 50, 5000);
+	if (ret) {
+		hibmc_dp_aux_reset(dp);
+		return ret;
+	}
+
+	return hibmc_dp_aux_parse_xfer(dp, msg);
+}
+
+void hibmc_dp_aux_init(struct hibmc_dp *dp)
+{
+	hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_SYNC_LEN_SEL, 0x0);
+	hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_TIMER_TIMEOUT, 0x1);
+	hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_MIN_PULSE_NUM,
+				 HIBMC_DP_MIN_PULSE_NUM);
+
+	dp->aux.transfer = hibmc_dp_aux_xfer;
+	dp->aux.name = "HIBMC DRM dp aux";
+	dp->aux.drm_dev = dp->drm_dev;
+	drm_dp_aux_init(&dp->aux);
+	dp->dp_dev->aux = &dp->aux;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h

@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_COMM_H
+#define DP_COMM_H
+
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/kernel.h>
+#include <linux/bitfield.h>
+#include <linux/io.h>
+#include <drm/display/drm_dp_helper.h>
+
+#include "dp_hw.h"
+
+#define HIBMC_DP_LANE_NUM_MAX 2
+
+struct hibmc_link_status {
+	bool clock_recovered;
+	bool channel_equalized;
+};
+
+struct hibmc_link_cap {
+	u8 link_rate;
+	u8 lanes;
+};
+
+struct hibmc_dp_link {
+	struct hibmc_link_status status;
+	u8 train_set[HIBMC_DP_LANE_NUM_MAX];
+	struct hibmc_link_cap cap;
+};
+
+struct hibmc_dp_dev {
+	struct drm_dp_aux *aux;
+	struct drm_device *dev;
+	void __iomem *base;
+	struct mutex lock; /* protects concurrent RW in hibmc_dp_reg_write_field() */
+	struct hibmc_dp_link link;
+	u8 dpcd[DP_RECEIVER_CAP_SIZE];
+	u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
+	struct drm_dp_desc desc;
+	bool is_branch;
+	int hpd_status;
+	void __iomem *serdes_base;
+};
+
+#define dp_field_modify(reg_value, mask, val)				\
+	do {								\
+		(reg_value) &= ~(mask);					\
+		(reg_value) |= FIELD_PREP(mask, val);			\
+	} while (0)							\
+
+#define hibmc_dp_reg_write_field(dp, offset, mask, val)			\
+	do {								\
+		typeof(dp) _dp = dp;					\
+		typeof(_dp->base) addr = (_dp->base + (offset));	\
+		mutex_lock(&_dp->lock);					\
+		u32 reg_value = readl(addr);				\
+		dp_field_modify(reg_value, mask, val);			\
+		writel(reg_value, addr);				\
+		mutex_unlock(&_dp->lock);				\
+	} while (0)
+
+void hibmc_dp_aux_init(struct hibmc_dp *dp);
+int hibmc_dp_link_training(struct hibmc_dp_dev *dp);
+int hibmc_dp_serdes_init(struct hibmc_dp_dev *dp);
+int hibmc_dp_serdes_rate_switch(u8 rate, struct hibmc_dp_dev *dp);
+int hibmc_dp_serdes_set_tx_cfg(struct hibmc_dp_dev *dp, u8 train_set[HIBMC_DP_LANE_NUM_MAX]);
+void hibmc_dp_update_caps(struct hibmc_dp_dev *dp);
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h

@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_CONFIG_H
+#define DP_CONFIG_H
+
+#define HIBMC_DP_BPP			24
+#define HIBMC_DP_SYMBOL_PER_FCLK	4
+#define HIBMC_DP_MSA1			0x20
+#define HIBMC_DP_MSA2			0x845c00
+#define HIBMC_DP_OFFSET			0x1e0000
+#define HIBMC_DP_HDCP			0x2
+#define HIBMC_DP_INT_RST		0xffff
+#define HIBMC_DP_DPTX_RST		0x3ff
+#define HIBMC_DP_CLK_EN			0x7
+#define HIBMC_DP_SYNC_EN_MASK		0x3
+#define HIBMC_DP_LINK_RATE_CAL		27
+#define HIBMC_DP_SYNC_DELAY(lanes)	((lanes) == 0x2 ? 86 : 46)
+#define HIBMC_DP_INT_ENABLE		0xc
+/* HIBMC_DP_LINK_RATE_CAL * 10000 * 80% = 216000 */
+#define DP_MODE_VALI_CAL		216000
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c

@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/delay.h>
+#include "dp_config.h"
+#include "dp_comm.h"
+#include "dp_reg.h"
+#include "dp_hw.h"
+
+static void hibmc_dp_set_tu(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 tu_symbol_frac_size;
+	u32 tu_symbol_size;
+	u32 rate_ks;
+	u8 lane_num;
+	u32 value;
+	u32 bpp;
+
+	lane_num = dp->link.cap.lanes;
+	if (lane_num == 0) {
+		drm_err(dp->dev, "set tu failed, lane num cannot be 0!\n");
+		return;
+	}
+
+	bpp = HIBMC_DP_BPP;
+	rate_ks = dp->link.cap.link_rate * HIBMC_DP_LINK_RATE_CAL;
+	value = (mode->clock * bpp * 5) / (61 * lane_num * rate_ks);
+
+	if (value % 10 == 9) { /* 9 carry */
+		tu_symbol_size = value / 10 + 1;
+		tu_symbol_frac_size = 0;
+	} else {
+		tu_symbol_size = value / 10;
+		tu_symbol_frac_size = value % 10 + 1;
+	}
+
+	drm_dbg_dp(dp->dev, "tu value: %u.%u value: %u\n",
+		   tu_symbol_size, tu_symbol_frac_size, value);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_PACKET,
+				 HIBMC_DP_CFG_STREAM_TU_SYMBOL_SIZE, tu_symbol_size);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_PACKET,
+				 HIBMC_DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE, tu_symbol_frac_size);
+}
+
+static void hibmc_dp_set_sst(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 hblank_size;
+	u32 htotal_size;
+	u32 htotal_int;
+	u32 hblank_int;
+	u32 fclk; /* flink_clock */
+
+	fclk = dp->link.cap.link_rate * HIBMC_DP_LINK_RATE_CAL;
+
+	/* Considering the effect of spread spectrum, the value may be deviated.
+	 * The coefficient (0.9947) is used to offset the deviation.
+	 */
+	htotal_int = mode->htotal * 9947 / 10000;
+	htotal_size = htotal_int * fclk / (HIBMC_DP_SYMBOL_PER_FCLK * (mode->clock / 1000));
+
+	hblank_int = mode->htotal - mode->hdisplay - mode->hdisplay * 53 / 10000;
+	hblank_size = hblank_int * fclk * 9947 /
+		      (mode->clock * 10 * HIBMC_DP_SYMBOL_PER_FCLK);
+
+	drm_dbg_dp(dp->dev, "h_active %u v_active %u htotal_size %u hblank_size %u",
+		   mode->hdisplay, mode->vdisplay, htotal_size, hblank_size);
+	drm_dbg_dp(dp->dev, "flink_clock %u pixel_clock %d", fclk, mode->clock / 1000);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_HORIZONTAL_SIZE,
+				 HIBMC_DP_CFG_STREAM_HTOTAL_SIZE, htotal_size);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_HORIZONTAL_SIZE,
+				 HIBMC_DP_CFG_STREAM_HBLANK_SIZE, hblank_size);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_PACKET,
+				 HIBMC_DP_CFG_STREAM_SYNC_CALIBRATION,
+				 HIBMC_DP_SYNC_DELAY(dp->link.cap.lanes));
+}
+
+static void hibmc_dp_link_cfg(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 timing_delay;
+	u32 vblank;
+	u32 hstart;
+	u32 vstart;
+
+	vblank = mode->vtotal - mode->vdisplay;
+	timing_delay = mode->htotal - mode->hsync_start;
+	hstart = mode->htotal - mode->hsync_start;
+	vstart = mode->vtotal - mode->vsync_start;
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG0,
+				 HIBMC_DP_CFG_TIMING_GEN0_HBLANK, mode->htotal - mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG0,
+				 HIBMC_DP_CFG_TIMING_GEN0_HACTIVE, mode->hdisplay);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG2,
+				 HIBMC_DP_CFG_TIMING_GEN0_VBLANK, vblank);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG2,
+				 HIBMC_DP_CFG_TIMING_GEN0_VACTIVE, mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG3,
+				 HIBMC_DP_CFG_TIMING_GEN0_VFRONT_PORCH,
+				 mode->vsync_start - mode->vdisplay);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG0,
+				 HIBMC_DP_CFG_STREAM_HACTIVE, mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG0,
+				 HIBMC_DP_CFG_STREAM_HBLANK, mode->htotal - mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG2,
+				 HIBMC_DP_CFG_STREAM_HSYNC_WIDTH,
+				 mode->hsync_end - mode->hsync_start);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG1,
+				 HIBMC_DP_CFG_STREAM_VACTIVE, mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG1,
+				 HIBMC_DP_CFG_STREAM_VBLANK, vblank);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG3,
+				 HIBMC_DP_CFG_STREAM_VFRONT_PORCH,
+				 mode->vsync_start - mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG3,
+				 HIBMC_DP_CFG_STREAM_VSYNC_WIDTH,
+				 mode->vsync_end - mode->vsync_start);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_MSA0,
+				 HIBMC_DP_CFG_STREAM_VSTART, vstart);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_MSA0,
+				 HIBMC_DP_CFG_STREAM_HSTART, hstart);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_VSYNC_POLARITY,
+				 mode->flags & DRM_MODE_FLAG_PVSYNC ? 1 : 0);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_HSYNC_POLARITY,
+				 mode->flags & DRM_MODE_FLAG_PHSYNC ? 1 : 0);
+
+	/* MSA mic 0 and 1 */
+	writel(HIBMC_DP_MSA1, dp->base + HIBMC_DP_VIDEO_MSA1);
+	writel(HIBMC_DP_MSA2, dp->base + HIBMC_DP_VIDEO_MSA2);
+
+	hibmc_dp_set_tu(dp, mode);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_RGB_ENABLE, 0x1);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_VIDEO_MAPPING, 0);
+
+	/* divide 2: up even */
+	if (timing_delay % 2)
+		timing_delay++;
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_MODEL_CTRL,
+				 HIBMC_DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1, timing_delay);
+
+	hibmc_dp_set_sst(dp, mode);
+}
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp)
+{
+	struct drm_device *drm_dev = dp->drm_dev;
+	struct hibmc_dp_dev *dp_dev;
+	int ret;
+
+	dp_dev = devm_kzalloc(drm_dev->dev, sizeof(struct hibmc_dp_dev), GFP_KERNEL);
+	if (!dp_dev)
+		return -ENOMEM;
+
+	mutex_init(&dp_dev->lock);
+
+	dp->dp_dev = dp_dev;
+
+	dp_dev->dev = drm_dev;
+	dp_dev->base = dp->mmio + HIBMC_DP_OFFSET;
+
+	hibmc_dp_aux_init(dp);
+
+	ret = hibmc_dp_serdes_init(dp_dev);
+	if (ret)
+		return ret;
+
+	dp_dev->link.cap.lanes = 0x2;
+	dp_dev->link.cap.link_rate = DP_LINK_BW_8_1;
+
+	/* int init */
+	writel(0, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+	writel(HIBMC_DP_INT_RST, dp_dev->base + HIBMC_DP_INTR_ORIGINAL_STATUS);
+	/* clr colorbar */
+	writel(0, dp_dev->base + HIBMC_DP_COLOR_BAR_CTRL);
+	/* rst */
+	writel(0, dp_dev->base + HIBMC_DP_DPTX_RST_CTRL);
+	usleep_range(30, 50);
+	/* de-rst */
+	writel(HIBMC_DP_DPTX_RST, dp_dev->base + HIBMC_DP_DPTX_RST_CTRL);
+	/* hdcp data */
+	writel(HIBMC_DP_HDCP, dp_dev->base + HIBMC_DP_HDCP_CFG);
+	/* clock enable */
+	writel(HIBMC_DP_CLK_EN, dp_dev->base + HIBMC_DP_DPTX_CLK_CTRL);
+
+	return 0;
+}
+
+void hibmc_dp_enable_int(struct hibmc_dp *dp)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+
+	writel(HIBMC_DP_INT_ENABLE, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+}
+
+void hibmc_dp_disable_int(struct hibmc_dp *dp)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+
+	writel(0, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+	writel(HIBMC_DP_INT_RST, dp_dev->base + HIBMC_DP_INTR_ORIGINAL_STATUS);
+}
+
+void hibmc_dp_hpd_cfg(struct hibmc_dp *dp)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+
+	hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_SYNC_LEN_SEL, 0x0);
+	hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_TIMER_TIMEOUT, 0x1);
+	hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_MIN_PULSE_NUM, 0x9);
+	writel(HIBMC_DP_HDCP, dp_dev->base + HIBMC_DP_HDCP_CFG);
+	writel(0, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+	writel(HIBMC_DP_INT_RST, dp_dev->base + HIBMC_DP_INTR_ORIGINAL_STATUS);
+	writel(HIBMC_DP_INT_ENABLE, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+	writel(HIBMC_DP_DPTX_RST, dp_dev->base + HIBMC_DP_DPTX_RST_CTRL);
+	writel(HIBMC_DP_CLK_EN, dp_dev->base + HIBMC_DP_DPTX_CLK_CTRL);
+}
+
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+
+	if (enable) {
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_VIDEO_CTRL, BIT(0), 0x1);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_DPTX_GCTL0, BIT(10), 0x1);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+	} else {
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_DPTX_GCTL0, BIT(10), 0);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_VIDEO_CTRL, BIT(0), 0);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+	}
+
+	msleep(50);
+}
+
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+	int ret;
+
+	if (!dp_dev->link.status.channel_equalized) {
+		ret = hibmc_dp_link_training(dp_dev);
+		if (ret) {
+			drm_err(dp->drm_dev, "dp link training failed, ret: %d\n", ret);
+			return ret;
+		}
+	}
+
+	hibmc_dp_display_en(dp, false);
+	hibmc_dp_link_cfg(dp_dev, mode);
+
+	return 0;
+}
+
+void hibmc_dp_reset_link(struct hibmc_dp *dp)
+{
+	dp->dp_dev->link.status.clock_recovered = false;
+	dp->dp_dev->link.status.channel_equalized = false;
+}
+
+u8 hibmc_dp_get_link_rate(struct hibmc_dp *dp)
+{
+	return dp->dp_dev->link.cap.link_rate;
+}
+
+u8 hibmc_dp_get_lanes(struct hibmc_dp *dp)
+{
+	return dp->dp_dev->link.cap.lanes;
+}
+
+static const struct hibmc_dp_color_raw g_rgb_raw[] = {
+	{CBAR_COLOR_BAR, 0x000, 0x000, 0x000},
+	{CBAR_WHITE,     0xfff, 0xfff, 0xfff},
+	{CBAR_RED,       0xfff, 0x000, 0x000},
+	{CBAR_ORANGE,    0xfff, 0x800, 0x000},
+	{CBAR_YELLOW,    0xfff, 0xfff, 0x000},
+	{CBAR_GREEN,     0x000, 0xfff, 0x000},
+	{CBAR_CYAN,      0x000, 0x800, 0x800},
+	{CBAR_BLUE,      0x000, 0x000, 0xfff},
+	{CBAR_PURPLE,    0x800, 0x000, 0x800},
+	{CBAR_BLACK,     0x000, 0x000, 0x000},
+};
+
+void hibmc_dp_set_cbar(struct hibmc_dp *dp, const struct hibmc_dp_cbar_cfg *cfg)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+	struct hibmc_dp_color_raw raw_data;
+
+	if (cfg->enable) {
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(9),
+					 cfg->self_timing);
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, GENMASK(8, 1),
+					 cfg->dynamic_rate);
+		if (cfg->pattern == CBAR_COLOR_BAR) {
+			hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(10), 0);
+		} else {
+			raw_data = g_rgb_raw[cfg->pattern];
+			drm_dbg_dp(dp->drm_dev, "r:%x g:%x b:%x\n", raw_data.r_value,
+				   raw_data.g_value, raw_data.b_value);
+			hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(10), 1);
+			hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, GENMASK(23, 12),
+						 raw_data.r_value);
+			hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL1, GENMASK(23, 12),
+						 raw_data.g_value);
+			hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL1, GENMASK(11, 0),
+						 raw_data.b_value);
+		}
+	}
+
+	hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(0), cfg->enable);
+	writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+}
+
+bool hibmc_dp_check_hpd_status(struct hibmc_dp *dp, int exp_status)
+{
+	u32 status;
+	int ret;
+
+	ret = readl_poll_timeout(dp->dp_dev->base + HIBMC_DP_HPD_STATUS, status,
+				 FIELD_GET(HIBMC_DP_HPD_CUR_STATE, status) == exp_status,
+				 1000, 100000); /* DP spec says 100ms */
+	if (ret) {
+		drm_dbg_dp(dp->drm_dev, "wait hpd status timeout");
+		return false;
+	}
+
+	dp->dp_dev->hpd_status = exp_status;
+
+	return true;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h

@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_KAPI_H
+#define DP_KAPI_H
+
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_print.h>
+#include <drm/display/drm_dp_helper.h>
+
+struct hibmc_dp_dev;
+
+enum hibmc_hpd_status {
+	HIBMC_HPD_OUT,
+	HIBMC_HPD_IN,
+};
+
+enum hibmc_dp_cbar_pattern {
+	CBAR_COLOR_BAR,
+	CBAR_WHITE,
+	CBAR_RED,
+	CBAR_ORANGE,
+	CBAR_YELLOW,
+	CBAR_GREEN,
+	CBAR_CYAN,
+	CBAR_BLUE,
+	CBAR_PURPLE,
+	CBAR_BLACK,
+};
+
+struct hibmc_dp_color_raw {
+	enum hibmc_dp_cbar_pattern pattern;
+	u32 r_value;
+	u32 g_value;
+	u32 b_value;
+};
+
+struct hibmc_dp_cbar_cfg {
+	u8 enable;
+	u8 self_timing;
+	u8 dynamic_rate; /* 0:static, 1-255(frame):dynamic */
+	enum hibmc_dp_cbar_pattern pattern;
+};
+
+struct hibmc_dp {
+	struct hibmc_dp_dev *dp_dev;
+	struct drm_device *drm_dev;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	void __iomem *mmio;
+	struct drm_dp_aux aux;
+	struct hibmc_dp_cbar_cfg cfg;
+	u32 irq_status;
+	int phys_status;
+};
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp);
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode);
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable);
+void hibmc_dp_set_cbar(struct hibmc_dp *dp, const struct hibmc_dp_cbar_cfg *cfg);
+void hibmc_dp_reset_link(struct hibmc_dp *dp);
+void hibmc_dp_hpd_cfg(struct hibmc_dp *dp);
+void hibmc_dp_enable_int(struct hibmc_dp *dp);
+void hibmc_dp_disable_int(struct hibmc_dp *dp);
+bool hibmc_dp_check_hpd_status(struct hibmc_dp *dp, int exp_status);
+u8 hibmc_dp_get_link_rate(struct hibmc_dp *dp);
+u8 hibmc_dp_get_lanes(struct hibmc_dp *dp);
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c

@@ -0,0 +1,392 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/delay.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include "dp_comm.h"
+#include "dp_reg.h"
+
+#define HIBMC_EQ_MAX_RETRY 5
+
+static inline int hibmc_dp_get_serdes_rate_cfg(struct hibmc_dp_dev *dp)
+{
+	switch (dp->link.cap.link_rate) {
+	case DP_LINK_BW_1_62:
+		return DP_SERDES_BW_1_62;
+	case DP_LINK_BW_2_7:
+		return DP_SERDES_BW_2_7;
+	case DP_LINK_BW_5_4:
+		return DP_SERDES_BW_5_4;
+	case DP_LINK_BW_8_1:
+		return DP_SERDES_BW_8_1;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int hibmc_dp_link_training_configure(struct hibmc_dp_dev *dp)
+{
+	u8 buf[2];
+	int ret;
+
+	/* DP 2 lane */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_LANE_DATA_EN,
+				 dp->link.cap.lanes == 0x2 ? 0x3 : 0x1);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_GCTL0, HIBMC_DP_CFG_PHY_LANE_NUM,
+				 dp->link.cap.lanes == 0x2 ? 0x1 : 0);
+
+	/* enhanced frame */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_FRAME_MODE, 0x1);
+
+	/* set rate and lane count */
+	buf[0] = dp->link.cap.link_rate;
+	buf[1] = DP_LANE_COUNT_ENHANCED_FRAME_EN | dp->link.cap.lanes;
+	ret = drm_dp_dpcd_write(dp->aux, DP_LINK_BW_SET, buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write link rate and lanes failed, ret: %d\n", ret);
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	/* set 8b/10b and downspread */
+	buf[0] = DP_SPREAD_AMP_0_5;
+	buf[1] = DP_SET_ANSI_8B10B;
+	ret = drm_dp_dpcd_write(dp->aux, DP_DOWNSPREAD_CTRL, buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write 8b/10b and downspread failed, ret: %d\n", ret);
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static int hibmc_dp_link_set_pattern(struct hibmc_dp_dev *dp, int pattern)
+{
+	int ret;
+	u8 val;
+	u8 buf;
+
+	buf = (u8)pattern;
+	if (pattern != DP_TRAINING_PATTERN_DISABLE && pattern != DP_TRAINING_PATTERN_4) {
+		buf |= DP_LINK_SCRAMBLING_DISABLE;
+		hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_SCRAMBLE_EN, 0x1);
+	} else {
+		hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_SCRAMBLE_EN, 0);
+	}
+
+	switch (pattern) {
+	case DP_TRAINING_PATTERN_DISABLE:
+		val = 0;
+		break;
+	case DP_TRAINING_PATTERN_1:
+		val = 1;
+		break;
+	case DP_TRAINING_PATTERN_2:
+		val = 2;
+		break;
+	case DP_TRAINING_PATTERN_3:
+		val = 3;
+		break;
+	case DP_TRAINING_PATTERN_4:
+		val = 4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_PAT_SEL, val);
+
+	ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_PATTERN_SET, &buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write training pattern set failed\n");
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_cr_pre(struct hibmc_dp_dev *dp)
+{
+	u8 *train_set = dp->link.train_set;
+	int ret;
+	u8 i;
+
+	ret = hibmc_dp_link_training_configure(dp);
+	if (ret)
+		return ret;
+
+	ret = hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_1);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < dp->link.cap.lanes; i++)
+		train_set[i] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
+
+	ret = hibmc_dp_serdes_set_tx_cfg(dp, dp->link.train_set);
+	if (ret)
+		return ret;
+
+	ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET, train_set, dp->link.cap.lanes);
+	if (ret != dp->link.cap.lanes) {
+		drm_dbg_dp(dp->dev, "dp aux write training lane set failed\n");
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static bool hibmc_dp_link_get_adjust_train(struct hibmc_dp_dev *dp,
+					   u8 lane_status[DP_LINK_STATUS_SIZE])
+{
+	u8 train_set[HIBMC_DP_LANE_NUM_MAX] = {0};
+	u8 lane;
+
+	for (lane = 0; lane < dp->link.cap.lanes; lane++)
+		train_set[lane] = drm_dp_get_adjust_request_voltage(lane_status, lane) |
+				  drm_dp_get_adjust_request_pre_emphasis(lane_status, lane);
+
+	if (memcmp(dp->link.train_set, train_set, HIBMC_DP_LANE_NUM_MAX)) {
+		memcpy(dp->link.train_set, train_set, HIBMC_DP_LANE_NUM_MAX);
+		return true;
+	}
+
+	return false;
+}
+
+static int hibmc_dp_link_reduce_rate(struct hibmc_dp_dev *dp)
+{
+	int ret;
+
+	switch (dp->link.cap.link_rate) {
+	case DP_LINK_BW_2_7:
+		dp->link.cap.link_rate = DP_LINK_BW_1_62;
+		break;
+	case DP_LINK_BW_5_4:
+		dp->link.cap.link_rate = DP_LINK_BW_2_7;
+		break;
+	case DP_LINK_BW_8_1:
+		dp->link.cap.link_rate = DP_LINK_BW_5_4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = hibmc_dp_get_serdes_rate_cfg(dp);
+	if (ret < 0)
+		return ret;
+
+	return hibmc_dp_serdes_rate_switch(ret, dp);
+}
+
+static inline int hibmc_dp_link_reduce_lane(struct hibmc_dp_dev *dp)
+{
+	switch (dp->link.cap.lanes) {
+	case 0x2:
+		dp->link.cap.lanes--;
+		drm_dbg_dp(dp->dev, "dp link training reduce to 1 lane\n");
+		break;
+	case 0x1:
+		drm_err(dp->dev, "dp link training reduce lane failed, already reach minimum\n");
+		return -EIO;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_cr(struct hibmc_dp_dev *dp)
+{
+	u8 lane_status[DP_LINK_STATUS_SIZE] = {0};
+	bool level_changed;
+	u32 voltage_tries;
+	u32 cr_tries;
+	int ret;
+
+	/*
+	 * DP 1.4 spec define 10 for maxtries value, for pre DP 1.4 version set a limit of 80
+	 * (4 voltage levels x 4 preemphasis levels x 5 identical voltage retries)
+	 */
+
+	voltage_tries = 1;
+	for (cr_tries = 0; cr_tries < 80; cr_tries++) {
+		drm_dp_link_train_clock_recovery_delay(dp->aux, dp->dpcd);
+
+		ret = drm_dp_dpcd_read_link_status(dp->aux, lane_status);
+		if (ret) {
+			drm_err(dp->dev, "Get lane status failed\n");
+			return ret;
+		}
+
+		if (drm_dp_clock_recovery_ok(lane_status, dp->link.cap.lanes)) {
+			drm_dbg_dp(dp->dev, "dp link training cr done\n");
+			dp->link.status.clock_recovered = true;
+			return 0;
+		}
+
+		if (voltage_tries == 5) {
+			drm_dbg_dp(dp->dev, "same voltage tries 5 times\n");
+			dp->link.status.clock_recovered = false;
+			return 0;
+		}
+
+		level_changed = hibmc_dp_link_get_adjust_train(dp, lane_status);
+
+		ret = hibmc_dp_serdes_set_tx_cfg(dp, dp->link.train_set);
+		if (ret)
+			return ret;
+
+		ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET, dp->link.train_set,
+					dp->link.cap.lanes);
+		if (ret != dp->link.cap.lanes) {
+			drm_dbg_dp(dp->dev, "Update link training failed\n");
+			return ret >= 0 ? -EIO : ret;
+		}
+
+		voltage_tries = level_changed ? 1 : voltage_tries + 1;
+	}
+
+	drm_err(dp->dev, "dp link training clock recovery 80 times failed\n");
+	dp->link.status.clock_recovered = false;
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_channel_eq(struct hibmc_dp_dev *dp)
+{
+	u8 lane_status[DP_LINK_STATUS_SIZE] = {0};
+	u8 eq_tries;
+	int ret;
+
+	ret = hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_2);
+	if (ret)
+		return ret;
+
+	for (eq_tries = 0; eq_tries < HIBMC_EQ_MAX_RETRY; eq_tries++) {
+		drm_dp_link_train_channel_eq_delay(dp->aux, dp->dpcd);
+
+		ret = drm_dp_dpcd_read_link_status(dp->aux, lane_status);
+		if (ret) {
+			drm_err(dp->dev, "get lane status failed\n");
+			break;
+		}
+
+		if (!drm_dp_clock_recovery_ok(lane_status, dp->link.cap.lanes)) {
+			drm_dbg_dp(dp->dev, "clock recovery check failed\n");
+			drm_dbg_dp(dp->dev, "cannot continue channel equalization\n");
+			dp->link.status.clock_recovered = false;
+			break;
+		}
+
+		if (drm_dp_channel_eq_ok(lane_status, dp->link.cap.lanes)) {
+			dp->link.status.channel_equalized = true;
+			drm_dbg_dp(dp->dev, "dp link training eq done\n");
+			break;
+		}
+
+		hibmc_dp_link_get_adjust_train(dp, lane_status);
+
+		ret = hibmc_dp_serdes_set_tx_cfg(dp, dp->link.train_set);
+		if (ret)
+			return ret;
+
+		ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET,
+					dp->link.train_set, dp->link.cap.lanes);
+		if (ret != dp->link.cap.lanes) {
+			drm_dbg_dp(dp->dev, "Update link training failed\n");
+			ret = (ret >= 0) ? -EIO : ret;
+			break;
+		}
+	}
+
+	if (eq_tries == HIBMC_EQ_MAX_RETRY)
+		drm_err(dp->dev, "channel equalization failed %u times\n", eq_tries);
+
+	hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_DISABLE);
+
+	return ret < 0 ? ret : 0;
+}
+
+static int hibmc_dp_link_downgrade_training_cr(struct hibmc_dp_dev *dp)
+{
+	if (hibmc_dp_link_reduce_rate(dp))
+		return hibmc_dp_link_reduce_lane(dp);
+
+	return 0;
+}
+
+static int hibmc_dp_link_downgrade_training_eq(struct hibmc_dp_dev *dp)
+{
+	if ((dp->link.status.clock_recovered && !dp->link.status.channel_equalized)) {
+		if (!hibmc_dp_link_reduce_lane(dp))
+			return 0;
+	}
+
+	return hibmc_dp_link_reduce_rate(dp);
+}
+
+void hibmc_dp_update_caps(struct hibmc_dp_dev *dp)
+{
+	dp->link.cap.link_rate = dp->dpcd[DP_MAX_LINK_RATE];
+	if (dp->link.cap.link_rate > DP_LINK_BW_8_1 || !dp->link.cap.link_rate)
+		dp->link.cap.link_rate = DP_LINK_BW_8_1;
+
+	dp->link.cap.lanes = dp->dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
+	if (dp->link.cap.lanes > HIBMC_DP_LANE_NUM_MAX)
+		dp->link.cap.lanes = HIBMC_DP_LANE_NUM_MAX;
+}
+
+int hibmc_dp_link_training(struct hibmc_dp_dev *dp)
+{
+	struct hibmc_dp_link *link = &dp->link;
+	int ret;
+
+	ret = drm_dp_read_dpcd_caps(dp->aux, dp->dpcd);
+	if (ret)
+		drm_err(dp->dev, "dp aux read dpcd failed, ret: %d\n", ret);
+
+	hibmc_dp_update_caps(dp);
+
+	ret = hibmc_dp_get_serdes_rate_cfg(dp);
+	if (ret < 0)
+		return ret;
+
+	ret = hibmc_dp_serdes_rate_switch(ret, dp);
+	if (ret)
+		return ret;
+
+	while (true) {
+		ret = hibmc_dp_link_training_cr_pre(dp);
+		if (ret)
+			goto err;
+
+		ret = hibmc_dp_link_training_cr(dp);
+		if (ret)
+			goto err;
+
+		if (!link->status.clock_recovered) {
+			ret = hibmc_dp_link_downgrade_training_cr(dp);
+			if (ret)
+				goto err;
+			continue;
+		}
+
+		ret = hibmc_dp_link_training_channel_eq(dp);
+		if (ret)
+			goto err;
+
+		if (!link->status.channel_equalized) {
+			ret = hibmc_dp_link_downgrade_training_eq(dp);
+			if (ret)
+				goto err;
+			continue;
+		}
+
+		return 0;
+	}
+
+err:
+	hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_DISABLE);
+
+	return ret;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h

@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_REG_H
+#define DP_REG_H
+
+#define HIBMC_DP_AUX_CMD_ADDR			0x50
+
+#define HIBMC_DP_AUX_WR_DATA0			0x54
+#define HIBMC_DP_AUX_WR_DATA1			0x58
+#define HIBMC_DP_AUX_WR_DATA2			0x5c
+#define HIBMC_DP_AUX_WR_DATA3			0x60
+#define HIBMC_DP_AUX_RD_DATA0			0x64
+
+#define HIBMC_DP_AUX_REQ			0x74
+#define HIBMC_DP_CFG_AUX_REQ			BIT(0)
+#define HIBMC_DP_CFG_AUX_SYNC_LEN_SEL		BIT(1)
+#define HIBMC_DP_CFG_AUX_TIMER_TIMEOUT		BIT(2)
+#define HIBMC_DP_CFG_AUX_MIN_PULSE_NUM		GENMASK(13, 9)
+
+#define HIBMC_DP_AUX_STATUS			0x78
+#define HIBMC_DP_CFG_AUX_TIMEOUT		BIT(0)
+#define HIBMC_DP_CFG_AUX_STATUS			GENMASK(11, 4)
+#define HIBMC_DP_CFG_AUX_READY_DATA_BYTE	GENMASK(16, 12)
+#define HIBMC_DP_CFG_AUX			GENMASK(24, 17)
+
+#define HIBMC_DP_HPD_STATUS			0x98
+#define HIBMC_DP_HPD_CUR_STATE		GENMASK(7, 4)
+
+#define HIBMC_DP_PHYIF_CTRL0			0xa0
+#define HIBMC_DP_CFG_SCRAMBLE_EN		BIT(0)
+#define HIBMC_DP_CFG_PAT_SEL			GENMASK(7, 4)
+#define HIBMC_DP_CFG_LANE_DATA_EN		GENMASK(11, 8)
+
+#define HIBMC_DP_VIDEO_CTRL			0x100
+#define HIBMC_DP_CFG_STREAM_RGB_ENABLE		BIT(1)
+#define HIBMC_DP_CFG_STREAM_VIDEO_MAPPING	GENMASK(5, 2)
+#define HIBMC_DP_CFG_STREAM_FRAME_MODE		BIT(6)
+#define HIBMC_DP_CFG_STREAM_HSYNC_POLARITY	BIT(7)
+#define HIBMC_DP_CFG_STREAM_VSYNC_POLARITY	BIT(8)
+
+#define HIBMC_DP_VIDEO_CONFIG0			0x104
+#define HIBMC_DP_CFG_STREAM_HACTIVE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HBLANK		GENMASK(15, 0)
+
+#define HIBMC_DP_VIDEO_CONFIG1			0x108
+#define HIBMC_DP_CFG_STREAM_VACTIVE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_VBLANK		GENMASK(15, 0)
+
+#define HIBMC_DP_VIDEO_CONFIG2			0x10c
+#define HIBMC_DP_CFG_STREAM_HSYNC_WIDTH		GENMASK(15, 0)
+
+#define HIBMC_DP_VIDEO_CONFIG3			0x110
+#define HIBMC_DP_CFG_STREAM_VSYNC_WIDTH		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_VFRONT_PORCH	GENMASK(31, 16)
+
+#define HIBMC_DP_VIDEO_PACKET			0x114
+#define HIBMC_DP_CFG_STREAM_TU_SYMBOL_SIZE	GENMASK(5, 0)
+#define HIBMC_DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE	GENMASK(9, 6)
+#define HIBMC_DP_CFG_STREAM_SYNC_CALIBRATION	GENMASK(31, 20)
+
+#define HIBMC_DP_VIDEO_MSA0			0x118
+#define HIBMC_DP_CFG_STREAM_VSTART		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HSTART		GENMASK(15, 0)
+
+#define HIBMC_DP_VIDEO_MSA1			0x11c
+#define HIBMC_DP_VIDEO_MSA2			0x120
+
+#define HIBMC_DP_VIDEO_HORIZONTAL_SIZE		0X124
+#define HIBMC_DP_CFG_STREAM_HTOTAL_SIZE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HBLANK_SIZE		GENMASK(15, 0)
+
+#define HIBMC_DP_COLOR_BAR_CTRL			0x260
+#define HIBMC_DP_COLOR_BAR_CTRL1		0x264
+
+#define HIBMC_DP_TIMING_GEN_CONFIG0		0x26c
+#define HIBMC_DP_CFG_TIMING_GEN0_HACTIVE	GENMASK(31, 16)
+#define HIBMC_DP_CFG_TIMING_GEN0_HBLANK		GENMASK(15, 0)
+
+#define HIBMC_DP_TIMING_GEN_CONFIG2		0x274
+#define HIBMC_DP_CFG_TIMING_GEN0_VACTIVE	GENMASK(31, 16)
+#define HIBMC_DP_CFG_TIMING_GEN0_VBLANK		GENMASK(15, 0)
+
+#define HIBMC_DP_TIMING_GEN_CONFIG3		0x278
+#define HIBMC_DP_CFG_TIMING_GEN0_VFRONT_PORCH	GENMASK(31, 16)
+
+#define HIBMC_DP_HDCP_CFG			0x600
+
+#define HIBMC_DP_DPTX_RST_CTRL			0x700
+#define HIBMC_DP_CFG_AUX_RST_N			BIT(4)
+
+#define HIBMC_DP_DPTX_CLK_CTRL			0x704
+
+#define HIBMC_DP_DPTX_GCTL0			0x708
+#define HIBMC_DP_CFG_PHY_LANE_NUM		GENMASK(2, 1)
+
+#define HIBMC_DP_INTR_ENABLE			0x720
+#define HIBMC_DP_INTR_ORIGINAL_STATUS		0x728
+
+#define HIBMC_DP_TIMING_MODEL_CTRL		0x884
+#define HIBMC_DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1	GENMASK(31, 16)
+
+#define HIBMC_DP_TIMING_SYNC_CTRL		0xFF0
+
+#define HIBMC_DP_INTSTAT			0x1e0724
+#define HIBMC_DP_INTCLR				0x1e0728
+
+/* dp serdes reg */
+#define HIBMC_DP_HOST_OFFSET		0x10000
+#define HIBMC_DP_LANE0_RATE_OFFSET	0x4
+#define HIBMC_DP_LANE1_RATE_OFFSET	0xc
+#define HIBMC_DP_LANE_STATUS_OFFSET	0x10
+#define HIBMC_DP_PMA_LANE0_OFFSET	0x18
+#define HIBMC_DP_PMA_LANE1_OFFSET	0x1c
+#define HIBMC_DP_HOST_SERDES_CTRL	0x1f001c
+#define HIBMC_DP_PMA_TXDEEMPH		GENMASK(18, 1)
+#define DP_SERDES_DONE			0x3
+
+/* dp serdes TX-Deempth Configuration */
+#define DP_SERDES_VOL0_PRE0		0x280
+#define DP_SERDES_VOL0_PRE1		0x2300
+#define DP_SERDES_VOL0_PRE2		0x53c0
+#define DP_SERDES_VOL0_PRE3		0x8400
+#define DP_SERDES_VOL1_PRE0		0x380
+#define DP_SERDES_VOL1_PRE1		0x3440
+#define DP_SERDES_VOL1_PRE2		0x6480
+#define DP_SERDES_VOL2_PRE0		0x4c1
+#define DP_SERDES_VOL2_PRE1		0x4500
+#define DP_SERDES_VOL3_PRE0		0x600
+#define DP_SERDES_BW_8_1		0x3
+#define DP_SERDES_BW_5_4		0x2
+#define DP_SERDES_BW_2_7		0x1
+#define DP_SERDES_BW_1_62		0x0
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/dp/dp_serdes.c

@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2025 Hisilicon Limited.
+
+#include <linux/delay.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include "dp_comm.h"
+#include "dp_config.h"
+#include "dp_reg.h"
+
+int hibmc_dp_serdes_set_tx_cfg(struct hibmc_dp_dev *dp, u8 train_set[HIBMC_DP_LANE_NUM_MAX])
+{
+	static const u32 serdes_tx_cfg[4][4] = { {DP_SERDES_VOL0_PRE0, DP_SERDES_VOL0_PRE1,
+						  DP_SERDES_VOL0_PRE2, DP_SERDES_VOL0_PRE3},
+						 {DP_SERDES_VOL1_PRE0, DP_SERDES_VOL1_PRE1,
+						  DP_SERDES_VOL1_PRE2}, {DP_SERDES_VOL2_PRE0,
+						  DP_SERDES_VOL2_PRE1}, {DP_SERDES_VOL3_PRE0}};
+	int cfg[2];
+	int i;
+
+	for (i = 0; i < HIBMC_DP_LANE_NUM_MAX; i++) {
+		cfg[i] = serdes_tx_cfg[FIELD_GET(DP_TRAIN_VOLTAGE_SWING_MASK, train_set[i])]
+				      [FIELD_GET(DP_TRAIN_PRE_EMPHASIS_MASK, train_set[i])];
+		if (!cfg[i])
+			return -EINVAL;
+
+		/* lane1 offset is 4 */
+		writel(FIELD_PREP(HIBMC_DP_PMA_TXDEEMPH, cfg[i]),
+		       dp->serdes_base + HIBMC_DP_PMA_LANE0_OFFSET + i * 4);
+	}
+
+	usleep_range(300, 500);
+
+	if (readl(dp->serdes_base + HIBMC_DP_LANE_STATUS_OFFSET) != DP_SERDES_DONE) {
+		drm_dbg_dp(dp->dev, "dp serdes cfg failed\n");
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+int hibmc_dp_serdes_rate_switch(u8 rate, struct hibmc_dp_dev *dp)
+{
+	writel(rate, dp->serdes_base + HIBMC_DP_LANE0_RATE_OFFSET);
+	writel(rate, dp->serdes_base + HIBMC_DP_LANE1_RATE_OFFSET);
+
+	usleep_range(300, 500);
+
+	if (readl(dp->serdes_base + HIBMC_DP_LANE_STATUS_OFFSET) != DP_SERDES_DONE) {
+		drm_dbg_dp(dp->dev, "dp serdes rate switching failed\n");
+		return -EAGAIN;
+	}
+
+	if (rate < DP_SERDES_BW_8_1)
+		drm_dbg_dp(dp->dev, "reducing serdes rate to :%d\n",
+			   rate ? rate * HIBMC_DP_LINK_RATE_CAL * 10 : 162);
+
+	return 0;
+}
+
+int hibmc_dp_serdes_init(struct hibmc_dp_dev *dp)
+{
+	dp->serdes_base = dp->base + HIBMC_DP_HOST_OFFSET;
+
+	writel(FIELD_PREP(HIBMC_DP_PMA_TXDEEMPH, DP_SERDES_VOL0_PRE0),
+	       dp->serdes_base + HIBMC_DP_PMA_LANE0_OFFSET);
+	writel(FIELD_PREP(HIBMC_DP_PMA_TXDEEMPH, DP_SERDES_VOL0_PRE0),
+	       dp->serdes_base + HIBMC_DP_PMA_LANE1_OFFSET);
+
+	return hibmc_dp_serdes_rate_switch(DP_SERDES_BW_8_1, dp);
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c

@@ -0,0 +1,548 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+struct hibmc_display_panel_pll {
+	u64 M;
+	u64 N;
+	u64 OD;
+	u64 POD;
+};
+
+struct hibmc_dislay_pll_config {
+	u64 hdisplay;
+	u64 vdisplay;
+	int clock;
+	u32 pll1_config_value;
+	u32 pll2_config_value;
+};
+
+static const struct hibmc_dislay_pll_config hibmc_pll_table[] = {
+	{640, 480, 25000, CRT_PLL1_HS_25MHZ, CRT_PLL2_HS_25MHZ},
+	{800, 600, 40000, CRT_PLL1_HS_40MHZ, CRT_PLL2_HS_40MHZ},
+	{1024, 768, 65000, CRT_PLL1_HS_65MHZ, CRT_PLL2_HS_65MHZ},
+	{1152, 864, 78750, CRT_PLL1_HS_80MHZ_1152, CRT_PLL2_HS_80MHZ},
+	{1280, 768, 80000, CRT_PLL1_HS_80MHZ, CRT_PLL2_HS_80MHZ},
+	{1280, 720, 74375, CRT_PLL1_HS_74MHZ, CRT_PLL2_HS_74MHZ},
+	{1280, 960, 108000, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
+	{1280, 1024, 108000, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
+	{1440, 900, 105952, CRT_PLL1_HS_106MHZ, CRT_PLL2_HS_106MHZ},
+	{1600, 900, 108000, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
+	{1600, 1200, 162500, CRT_PLL1_HS_162MHZ, CRT_PLL2_HS_162MHZ},
+	{1920, 1080, 148750, CRT_PLL1_HS_148MHZ, CRT_PLL2_HS_148MHZ},
+	{1920, 1200, 193750, CRT_PLL1_HS_193MHZ, CRT_PLL2_HS_193MHZ},
+};
+
+static int hibmc_get_best_clock_idx(const struct drm_display_mode *mode)
+{
+	int i, diff;
+
+	for (i = 0; i < ARRAY_SIZE(hibmc_pll_table); i++) {
+		if (hibmc_pll_table[i].hdisplay == mode->hdisplay &&
+		    hibmc_pll_table[i].vdisplay == mode->vdisplay) {
+			diff = abs(mode->clock - hibmc_pll_table[i].clock);
+			if (diff < mode->clock / 100) /* tolerance 1/100 */
+				return i;
+		}
+	}
+
+	return -MODE_CLOCK_RANGE;
+}
+
+static int hibmc_plane_atomic_check(struct drm_plane *plane,
+				    struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
+										 plane);
+	struct drm_framebuffer *fb = new_plane_state->fb;
+	struct drm_crtc *crtc = new_plane_state->crtc;
+	struct drm_crtc_state *crtc_state;
+	u32 src_w = new_plane_state->src_w >> 16;
+	u32 src_h = new_plane_state->src_h >> 16;
+
+	if (!crtc || !fb)
+		return 0;
+
+	crtc_state = drm_atomic_get_crtc_state(state, crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	if (src_w != new_plane_state->crtc_w || src_h != new_plane_state->crtc_h) {
+		drm_dbg_atomic(plane->dev, "scale not support\n");
+		return -EINVAL;
+	}
+
+	if (new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0) {
+		drm_dbg_atomic(plane->dev, "crtc_x/y of drm_plane state is invalid\n");
+		return -EINVAL;
+	}
+
+	if (!crtc_state->enable)
+		return 0;
+
+	if (new_plane_state->crtc_x + new_plane_state->crtc_w >
+	    crtc_state->adjusted_mode.hdisplay ||
+	    new_plane_state->crtc_y + new_plane_state->crtc_h >
+	    crtc_state->adjusted_mode.vdisplay) {
+		drm_dbg_atomic(plane->dev, "visible portion of plane is invalid\n");
+		return -EINVAL;
+	}
+
+	if (new_plane_state->fb->pitches[0] % 128 != 0) {
+		drm_dbg_atomic(plane->dev, "wrong stride with 128-byte aligned\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void hibmc_plane_atomic_update(struct drm_plane *plane,
+				      struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	u32 reg;
+	s64 gpu_addr = 0;
+	u32 line_l;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(plane->dev);
+	struct drm_gem_vram_object *gbo;
+
+	if (!new_state->fb)
+		return;
+
+	gbo = drm_gem_vram_of_gem(new_state->fb->obj[0]);
+
+	gpu_addr = drm_gem_vram_offset(gbo);
+	if (WARN_ON_ONCE(gpu_addr < 0))
+		return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
+
+	writel(gpu_addr, priv->mmio + HIBMC_CRT_FB_ADDRESS);
+
+	reg = new_state->fb->width * (new_state->fb->format->cpp[0]);
+
+	line_l = new_state->fb->pitches[0];
+	writel(HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_WIDTH, reg) |
+	       HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_OFFS, line_l),
+	       priv->mmio + HIBMC_CRT_FB_WIDTH);
+
+	/* SET PIXEL FORMAT */
+	reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL);
+	reg &= ~HIBMC_CRT_DISP_CTL_FORMAT_MASK;
+	reg |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_FORMAT,
+			   new_state->fb->format->cpp[0] * 8 / 16);
+	writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL);
+}
+
+static const u32 channel_formats1[] = {
+	DRM_FORMAT_RGB565, DRM_FORMAT_BGR565, DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888
+};
+
+static const struct drm_plane_funcs hibmc_plane_funcs = {
+	.update_plane	= drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = {
+	DRM_GEM_VRAM_PLANE_HELPER_FUNCS,
+	.atomic_check = hibmc_plane_atomic_check,
+	.atomic_update = hibmc_plane_atomic_update,
+};
+
+static void hibmc_crtc_dpms(struct drm_crtc *crtc, u32 dpms)
+{
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+	u32 reg;
+
+	reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL);
+	reg &= ~HIBMC_CRT_DISP_CTL_DPMS_MASK;
+	reg |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_DPMS, dpms);
+	reg &= ~HIBMC_CRT_DISP_CTL_TIMING_MASK;
+	if (dpms == HIBMC_CRT_DPMS_ON)
+		reg |= HIBMC_CRT_DISP_CTL_TIMING(1);
+	writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL);
+}
+
+static void hibmc_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_atomic_commit *state)
+{
+	u32 reg;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	hibmc_set_current_gate(priv, reg);
+	drm_crtc_vblank_on(crtc);
+	hibmc_crtc_dpms(crtc, HIBMC_CRT_DPMS_ON);
+}
+
+static void hibmc_crtc_atomic_disable(struct drm_crtc *crtc,
+				      struct drm_atomic_commit *state)
+{
+	u32 reg;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+
+	hibmc_crtc_dpms(crtc, HIBMC_CRT_DPMS_OFF);
+	drm_crtc_vblank_off(crtc);
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_SLEEP);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg |= HIBMC_CURR_GATE_LOCALMEM(0);
+	reg |= HIBMC_CURR_GATE_DISPLAY(0);
+	hibmc_set_current_gate(priv, reg);
+}
+
+static enum drm_mode_status
+hibmc_crtc_mode_valid(struct drm_crtc *crtc,
+		      const struct drm_display_mode *mode)
+{
+	int vrefresh = drm_mode_vrefresh(mode);
+
+	if (vrefresh < 59 || vrefresh > 61)
+		return MODE_NOCLOCK;
+
+	if (hibmc_get_best_clock_idx(mode) >= 0)
+		return MODE_OK;
+
+	return MODE_CLOCK_RANGE;
+}
+
+static u32 format_pll_reg(void)
+{
+	u32 pllreg = 0;
+	struct hibmc_display_panel_pll pll = {0};
+
+	/*
+	 * Note that all PLL's have the same format. Here,
+	 * we just use Panel PLL parameter to work out the bit
+	 * fields in the register.On returning a 32 bit number, the value can
+	 * be applied to any PLL in the calling function.
+	 */
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_BYPASS, 0);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POWER, 1);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_INPUT, 0);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POD, pll.POD);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_OD, pll.OD);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_N, pll.N);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_M, pll.M);
+
+	return pllreg;
+}
+
+static void set_vclock_hisilicon(struct drm_device *dev, u64 pll)
+{
+	u32 val;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+
+	val = readl(priv->mmio + CRT_PLL1_HS);
+	val &= ~(CRT_PLL1_HS_OUTER_BYPASS(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	val = CRT_PLL1_HS_INTER_BYPASS(1) | CRT_PLL1_HS_POWERON(1);
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	writel(pll, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val = pll & ~(CRT_PLL1_HS_POWERON(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val &= ~(CRT_PLL1_HS_INTER_BYPASS(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val |= CRT_PLL1_HS_OUTER_BYPASS(1);
+	writel(val, priv->mmio + CRT_PLL1_HS);
+}
+
+static void get_pll_config(struct drm_display_mode *mode, u32 *pll1, u32 *pll2)
+{
+	int idx;
+
+	idx = hibmc_get_best_clock_idx(mode);
+	if (idx < 0) {
+		/* if found none, we use default value */
+		*pll1 = CRT_PLL1_HS_25MHZ;
+		*pll2 = CRT_PLL2_HS_25MHZ;
+		return;
+	}
+
+	*pll1 = hibmc_pll_table[idx].pll1_config_value;
+	*pll2 = hibmc_pll_table[idx].pll2_config_value;
+}
+
+/*
+ * This function takes care the extra registers and bit fields required to
+ * setup a mode in board.
+ * Explanation about Display Control register:
+ * FPGA only supports 7 predefined pixel clocks, and clock select is
+ * in bit 4:0 of new register 0x802a8.
+ */
+static u32 display_ctrl_adjust(struct drm_device *dev,
+			       struct drm_display_mode *mode,
+			       u32 ctrl)
+{
+	u64 x, y;
+	u32 pll1; /* bit[31:0] of PLL */
+	u32 pll2; /* bit[63:32] of PLL */
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+
+	x = mode->hdisplay;
+	y = mode->vdisplay;
+
+	get_pll_config(mode, &pll1, &pll2);
+	writel(pll2, priv->mmio + CRT_PLL2_HS);
+	set_vclock_hisilicon(dev, pll1);
+
+	/*
+	 * Hisilicon has to set up the top-left and bottom-right
+	 * registers as well.
+	 * Note that normal chip only use those two register for
+	 * auto-centering mode.
+	 */
+	writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_TOP, 0) |
+	       HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_LEFT, 0),
+	       priv->mmio + HIBMC_CRT_AUTO_CENTERING_TL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM, y - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_RIGHT, x - 1),
+	       priv->mmio + HIBMC_CRT_AUTO_CENTERING_BR);
+
+	/*
+	 * Assume common fields in ctrl have been properly set before
+	 * calling this function.
+	 * This function only sets the extra fields in ctrl.
+	 */
+
+	/* Set bit 25 of display controller: Select CRT or VGA clock */
+	ctrl &= ~HIBMC_CRT_DISP_CTL_CRTSELECT_MASK;
+	ctrl &= ~HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK;
+
+	ctrl |= HIBMC_CRT_DISP_CTL_CRTSELECT(HIBMC_CRTSELECT_CRT);
+
+	/* clock_phase_polarity is 0 */
+	ctrl |= HIBMC_CRT_DISP_CTL_CLOCK_PHASE(0);
+
+	writel(ctrl, priv->mmio + HIBMC_CRT_DISP_CTL);
+
+	return ctrl;
+}
+
+static void hibmc_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	u32 val;
+	struct drm_display_mode *mode = &crtc->state->mode;
+	struct drm_device *dev = crtc->dev;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+	u32 width = mode->hsync_end - mode->hsync_start;
+	u32 height = mode->vsync_end - mode->vsync_start;
+
+	writel(format_pll_reg(), priv->mmio + HIBMC_CRT_PLL_CTRL);
+	writel(HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_TOTAL, mode->htotal - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_DISP_END, mode->hdisplay - 1),
+	       priv->mmio + HIBMC_CRT_HORZ_TOTAL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_WIDTH, width) |
+	       HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_START, mode->hsync_start - 1),
+	       priv->mmio + HIBMC_CRT_HORZ_SYNC);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_TOTAL, mode->vtotal - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_DISP_END, mode->vdisplay - 1),
+	       priv->mmio + HIBMC_CRT_VERT_TOTAL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_HEIGHT, height) |
+	       HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_START, mode->vsync_start - 1),
+	       priv->mmio + HIBMC_CRT_VERT_SYNC);
+
+	val = HIBMC_FIELD(HIBMC_CRT_DISP_CTL_VSYNC_PHASE, 0);
+	val |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_HSYNC_PHASE, 0);
+	val |= HIBMC_CRT_DISP_CTL_TIMING(1);
+	val |= HIBMC_CRT_DISP_CTL_PLANE(1);
+
+	display_ctrl_adjust(dev, mode, val);
+}
+
+static void hibmc_crtc_atomic_begin(struct drm_crtc *crtc,
+				    struct drm_atomic_commit *state)
+{
+	u32 reg;
+	struct drm_device *dev = crtc->dev;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+	hibmc_set_current_gate(priv, reg);
+
+	/* We can add more initialization as needed. */
+}
+
+static void hibmc_crtc_atomic_flush(struct drm_crtc *crtc,
+				    struct drm_atomic_commit *state)
+
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&crtc->dev->event_lock, flags);
+	if (crtc->state->event)
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+	crtc->state->event = NULL;
+	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+}
+
+static int hibmc_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+
+	writel(HIBMC_RAW_INTERRUPT_EN_VBLANK(1),
+	       priv->mmio + HIBMC_RAW_INTERRUPT_EN);
+
+	return 0;
+}
+
+static void hibmc_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+
+	writel(HIBMC_RAW_INTERRUPT_EN_VBLANK(0),
+	       priv->mmio + HIBMC_RAW_INTERRUPT_EN);
+}
+
+static void hibmc_crtc_load_lut(struct drm_crtc *crtc)
+{
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(crtc->dev);
+	void __iomem   *mmio = priv->mmio;
+	u16 *r, *g, *b;
+	u32 reg;
+	u32 i;
+
+	r = crtc->gamma_store;
+	g = r + crtc->gamma_size;
+	b = g + crtc->gamma_size;
+
+	for (i = 0; i < crtc->gamma_size; i++) {
+		u32 offset = i << 2;
+		u8 red = *r++ >> 8;
+		u8 green = *g++ >> 8;
+		u8 blue = *b++ >> 8;
+		u32 rgb = (red << 16) | (green << 8) | blue;
+
+		writel(rgb, mmio + HIBMC_CRT_PALETTE + offset);
+	}
+
+	reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL);
+	reg |= HIBMC_FIELD(HIBMC_CTL_DISP_CTL_GAMMA, 1);
+	writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL);
+}
+
+static int hibmc_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
+				u16 *blue, uint32_t size,
+				struct drm_modeset_acquire_ctx *ctx)
+{
+	hibmc_crtc_load_lut(crtc);
+
+	return 0;
+}
+
+static const struct drm_crtc_funcs hibmc_crtc_funcs = {
+	.page_flip = drm_atomic_helper_page_flip,
+	.set_config = drm_atomic_helper_set_config,
+	.destroy = drm_crtc_cleanup,
+	.reset = drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state =  drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+	.enable_vblank = hibmc_crtc_enable_vblank,
+	.disable_vblank = hibmc_crtc_disable_vblank,
+	.gamma_set = hibmc_crtc_gamma_set,
+};
+
+static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
+	.mode_set_nofb	= hibmc_crtc_mode_set_nofb,
+	.atomic_begin	= hibmc_crtc_atomic_begin,
+	.atomic_flush	= hibmc_crtc_atomic_flush,
+	.atomic_enable	= hibmc_crtc_atomic_enable,
+	.atomic_disable	= hibmc_crtc_atomic_disable,
+	.mode_valid = hibmc_crtc_mode_valid,
+};
+
+int hibmc_de_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = &priv->dev;
+	struct drm_crtc *crtc = &priv->crtc;
+	struct drm_plane *plane = &priv->primary_plane;
+	int ret;
+
+	ret = drm_universal_plane_init(dev, plane, 1, &hibmc_plane_funcs,
+				       channel_formats1,
+				       ARRAY_SIZE(channel_formats1),
+				       NULL,
+				       DRM_PLANE_TYPE_PRIMARY,
+				       NULL);
+
+	if (ret) {
+		drm_err(dev, "failed to init plane: %d\n", ret);
+		return ret;
+	}
+
+	drm_plane_helper_add(plane, &hibmc_plane_helper_funcs);
+
+	ret = drm_crtc_init_with_planes(dev, crtc, plane,
+					NULL, &hibmc_crtc_funcs, NULL);
+	if (ret) {
+		drm_err(dev, "failed to init crtc: %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_mode_crtc_set_gamma_size(crtc, 256);
+	if (ret) {
+		drm_err(dev, "failed to set gamma size: %d\n", ret);
+		return ret;
+	}
+	drm_crtc_helper_add(crtc, &hibmc_crtc_helper_funcs);
+
+	return 0;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c

@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/seq_file.h>
+#include <linux/pci.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
+
+#include "hibmc_drm_drv.h"
+
+#define MAX_BUF_SIZE 12
+
+static ssize_t hibmc_control_write(struct file *file, const char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	struct hibmc_drm_private *priv = file_inode(file)->i_private;
+	struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
+	int ret, idx;
+	u8 buf[MAX_BUF_SIZE];
+
+	if (count >= MAX_BUF_SIZE)
+		return -EINVAL;
+
+	if (copy_from_user(buf, user_buf, count))
+		return -EFAULT;
+
+	buf[count] = '\0';
+
+	/* Only 4 parameters is allowed, the ranger are as follow:
+	 * [0] enable/disable colorbar feature
+	       0: enable colorbar, 1: disable colorbar
+	 * [1] the timing source of colorbar displaying
+	       0: timing follows XDP, 1: internal self timing
+	 * [2] the movment of colorbar displaying
+	       0: static colorbar image,
+	 *     1~255: right shifting a type of color per (1~255)frames
+	 * [3] the color type of colorbar displaying
+	       0~9: color bar, white, red, orange,
+	 *          yellow, green, cyan, bule, pupper, black
+	 */
+	if (sscanf(buf, "%hhu %hhu %hhu %u", &cfg->enable, &cfg->self_timing,
+		   &cfg->dynamic_rate, &cfg->pattern) != 4) {
+		return -EINVAL;
+	}
+
+	if (cfg->pattern > 9 || cfg->enable > 1 || cfg->self_timing > 1)
+		return -EINVAL;
+
+	ret = drm_dev_enter(&priv->dev, &idx);
+	if (!ret)
+		return -ENODEV;
+
+	hibmc_dp_set_cbar(&priv->dp, cfg);
+
+	drm_dev_exit(idx);
+
+	return count;
+}
+
+static int hibmc_dp_dbgfs_show(struct seq_file *m, void *arg)
+{
+	struct hibmc_drm_private *priv = m->private;
+	struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
+	int idx;
+
+	if (!drm_dev_enter(&priv->dev, &idx))
+		return -ENODEV;
+
+	seq_printf(m, "hibmc dp colorbar cfg: %u %u %u %u\n", cfg->enable, cfg->self_timing,
+		   cfg->dynamic_rate, cfg->pattern);
+
+	drm_dev_exit(idx);
+
+	return 0;
+}
+
+static int hibmc_open(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, hibmc_dp_dbgfs_show, inode->i_private);
+}
+
+static const struct file_operations hibmc_dbg_fops = {
+	.owner   = THIS_MODULE,
+	.write   = hibmc_control_write,
+	.read    = seq_read,
+	.open    = hibmc_open,
+	.llseek  = seq_lseek,
+	.release = single_release,
+};
+
+void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root)
+{
+	struct drm_device *dev = connector->dev;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+
+	/* create the file in drm directory, so we don't need to remove manually */
+	debugfs_create_file("colorbar-cfg", 0200,
+			    root, priv, &hibmc_dbg_fops);
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c

@@ -0,0 +1,260 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_edid.h>
+
+#include "hibmc_drm_drv.h"
+#include "dp/dp_hw.h"
+#include "dp/dp_comm.h"
+#include "dp/dp_config.h"
+
+#define DP_MASKED_SINK_HPD_PLUG_INT	BIT(2)
+
+static int hibmc_dp_connector_get_modes(struct drm_connector *connector)
+{
+	const struct drm_edid *drm_edid;
+	int count;
+
+	drm_edid = drm_edid_read(connector);
+
+	drm_edid_connector_update(connector, drm_edid);
+
+	count = drm_edid_connector_add_modes(connector);
+
+	drm_edid_free(drm_edid);
+
+	return count;
+}
+
+static bool hibmc_dp_get_dpcd(struct hibmc_dp_dev *dp_dev)
+{
+	int ret;
+
+	ret = drm_dp_read_dpcd_caps(dp_dev->aux, dp_dev->dpcd);
+	if (ret)
+		return false;
+
+	hibmc_dp_update_caps(dp_dev);
+
+	dp_dev->is_branch = drm_dp_is_branch(dp_dev->dpcd);
+
+	ret = drm_dp_read_desc(dp_dev->aux, &dp_dev->desc, dp_dev->is_branch);
+	if (ret)
+		return false;
+
+	ret = drm_dp_read_downstream_info(dp_dev->aux, dp_dev->dpcd, dp_dev->downstream_ports);
+	if (ret)
+		return false;
+
+	return true;
+}
+
+static int hibmc_dp_detect(struct drm_connector *connector,
+			   struct drm_modeset_acquire_ctx *ctx, bool force)
+{
+	struct hibmc_dp *dp = to_hibmc_dp(connector);
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+	int ret = connector_status_disconnected;
+
+	if (dp->irq_status) {
+		if (dp_dev->hpd_status != HIBMC_HPD_IN) {
+			ret = connector_status_disconnected;
+			goto exit;
+		}
+	}
+
+	if (!hibmc_dp_get_dpcd(dp_dev)) {
+		ret = connector_status_disconnected;
+		goto exit;
+	}
+
+	if (!dp_dev->is_branch) {
+		ret = connector_status_connected;
+		goto exit;
+	}
+
+	if (drm_dp_read_sink_count_cap(connector, dp_dev->dpcd, &dp_dev->desc) &&
+	    dp_dev->downstream_ports[0] & DP_DS_PORT_HPD) {
+		ret = drm_dp_read_sink_count(dp_dev->aux);
+		if (ret > 0) {
+			ret = connector_status_connected;
+			goto exit;
+		}
+	}
+
+exit:
+	dp->phys_status = ret;
+
+	return ret;
+}
+
+static int hibmc_dp_mode_valid(struct drm_connector *connector,
+			       const struct drm_display_mode *mode,
+			       struct drm_modeset_acquire_ctx *ctx,
+			       enum drm_mode_status *status)
+{
+	struct hibmc_dp *dp = to_hibmc_dp(connector);
+	u64 cur_val, max_val;
+
+	/* check DP link BW */
+	cur_val = (u64)mode->clock * HIBMC_DP_BPP;
+	max_val = (u64)hibmc_dp_get_link_rate(dp) * DP_MODE_VALI_CAL * hibmc_dp_get_lanes(dp);
+
+	*status = cur_val > max_val ? MODE_CLOCK_HIGH : MODE_OK;
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs hibmc_dp_conn_helper_funcs = {
+	.get_modes = hibmc_dp_connector_get_modes,
+	.detect_ctx = hibmc_dp_detect,
+	.mode_valid_ctx = hibmc_dp_mode_valid,
+};
+
+static int hibmc_dp_late_register(struct drm_connector *connector)
+{
+	struct hibmc_dp *dp = to_hibmc_dp(connector);
+
+	hibmc_dp_enable_int(dp);
+
+	return drm_dp_aux_register(&dp->aux);
+}
+
+static void hibmc_dp_early_unregister(struct drm_connector *connector)
+{
+	struct hibmc_dp *dp = to_hibmc_dp(connector);
+
+	drm_dp_aux_unregister(&dp->aux);
+
+	hibmc_dp_disable_int(dp);
+}
+
+static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+	.late_register = hibmc_dp_late_register,
+	.early_unregister = hibmc_dp_early_unregister,
+	.debugfs_init = hibmc_debugfs_init,
+};
+
+static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
+{
+	int ret;
+
+	hibmc_dp_display_en(dp, false);
+
+	ret = hibmc_dp_mode_set(dp, mode);
+	if (ret)
+		drm_err(dp->drm_dev, "hibmc dp mode set failed: %d\n", ret);
+
+	return ret;
+}
+
+static void hibmc_dp_encoder_enable(struct drm_encoder *drm_encoder,
+				    struct drm_atomic_commit *state)
+{
+	struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
+	struct drm_display_mode *mode = &drm_encoder->crtc->state->mode;
+
+	if (hibmc_dp_prepare(dp, mode))
+		return;
+
+	hibmc_dp_display_en(dp, true);
+}
+
+static void hibmc_dp_encoder_disable(struct drm_encoder *drm_encoder,
+				     struct drm_atomic_commit *state)
+{
+	struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
+
+	hibmc_dp_display_en(dp, false);
+}
+
+static const struct drm_encoder_helper_funcs hibmc_dp_encoder_helper_funcs = {
+	.atomic_enable = hibmc_dp_encoder_enable,
+	.atomic_disable = hibmc_dp_encoder_disable,
+};
+
+irqreturn_t hibmc_dp_hpd_isr(int irq, void *arg)
+{
+	struct drm_device *dev = (struct drm_device *)arg;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+	int idx, exp_status;
+
+	if (!drm_dev_enter(dev, &idx))
+		return -ENODEV;
+
+	if (priv->dp.irq_status & DP_MASKED_SINK_HPD_PLUG_INT) {
+		drm_dbg_dp(&priv->dev, "HPD IN isr occur!\n");
+		hibmc_dp_hpd_cfg(&priv->dp);
+		exp_status = HIBMC_HPD_IN;
+	} else {
+		drm_dbg_dp(&priv->dev, "HPD OUT isr occur!\n");
+		hibmc_dp_reset_link(&priv->dp);
+		exp_status = HIBMC_HPD_OUT;
+	}
+
+	if (hibmc_dp_check_hpd_status(&priv->dp, exp_status))
+		drm_connector_helper_hpd_irq_event(&priv->dp.connector);
+
+	drm_dev_exit(idx);
+
+	return IRQ_HANDLED;
+}
+
+int hibmc_dp_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = &priv->dev;
+	struct drm_crtc *crtc = &priv->crtc;
+	struct hibmc_dp *dp = &priv->dp;
+	struct drm_connector *connector = &dp->connector;
+	struct drm_encoder *encoder = &dp->encoder;
+	int ret;
+
+	dp->mmio = priv->mmio;
+	dp->drm_dev = dev;
+
+	ret = hibmc_dp_hw_init(&priv->dp);
+	if (ret) {
+		drm_err(dev, "hibmc dp hw init failed: %d\n", ret);
+		return ret;
+	}
+
+	hibmc_dp_display_en(&priv->dp, false);
+
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+	ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL);
+	if (ret) {
+		drm_err(dev, "init dp encoder failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &hibmc_dp_encoder_helper_funcs);
+
+	ret = drm_connector_init_with_ddc(dev, connector, &hibmc_dp_conn_funcs,
+					  DRM_MODE_CONNECTOR_DisplayPort, &dp->aux.ddc);
+	if (ret) {
+		drm_err(dev, "init dp connector failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_connector_helper_add(connector, &hibmc_dp_conn_helper_funcs);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	dp->phys_status = connector_status_disconnected;
+
+	return 0;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c

@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#include <linux/aperture.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_ttm.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_module.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_probe_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+#include "dp/dp_reg.h"
+
+DEFINE_DRM_GEM_FOPS(hibmc_fops);
+
+static const char *g_irqs_names_map[HIBMC_MAX_VECTORS] = { "hibmc-vblank", "hibmc-hpd" };
+
+static irqreturn_t hibmc_interrupt(int irq, void *arg)
+{
+	struct drm_device *dev = (struct drm_device *)arg;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+	u32 status;
+
+	status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);
+
+	if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
+		writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
+		       priv->mmio + HIBMC_RAW_INTERRUPT);
+		drm_handle_vblank(dev, 0);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t hibmc_dp_interrupt(int irq, void *arg)
+{
+	struct drm_device *dev = (struct drm_device *)arg;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+	u32 status;
+
+	status = readl(priv->mmio + HIBMC_DP_INTSTAT);
+	if (status) {
+		priv->dp.irq_status = status;
+		writel(status, priv->mmio + HIBMC_DP_INTCLR);
+		return IRQ_WAKE_THREAD;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
+			     struct drm_mode_create_dumb *args)
+{
+	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
+}
+
+static const struct drm_driver hibmc_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &hibmc_fops,
+	.name			= "hibmc",
+	.desc			= "hibmc drm driver",
+	.major			= 1,
+	.minor			= 0,
+	.debugfs_init		= drm_vram_mm_debugfs_init,
+	.dumb_create            = hibmc_dumb_create,
+	.dumb_map_offset        = drm_gem_ttm_dumb_map_offset,
+	DRM_FBDEV_TTM_DRIVER_OPS,
+};
+
+static int __maybe_unused hibmc_pm_suspend(struct device *dev)
+{
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_suspend(drm_dev);
+}
+
+static int  __maybe_unused hibmc_pm_resume(struct device *dev)
+{
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_resume(drm_dev);
+}
+
+static const struct dev_pm_ops hibmc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
+				hibmc_pm_resume)
+};
+
+static const struct drm_mode_config_funcs hibmc_mode_funcs = {
+	.mode_valid = drm_vram_helper_mode_valid,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+	.fb_create = drm_gem_fb_create,
+};
+
+static int hibmc_kms_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = &priv->dev;
+	struct drm_encoder *encoder;
+	u32 clone_mask = 0;
+	int ret;
+
+	ret = drmm_mode_config_init(dev);
+	if (ret)
+		return ret;
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = 1920;
+	dev->mode_config.max_height = 1200;
+
+	dev->mode_config.preferred_depth = 24;
+	dev->mode_config.prefer_shadow = 1;
+
+	dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
+
+	ret = hibmc_de_init(priv);
+	if (ret) {
+		drm_err(dev, "failed to init de: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * If the serdes reg is readable and is not equal to 0,
+	 * DP block exists and initializes it.
+	 */
+	ret = readl(priv->mmio + HIBMC_DP_HOST_SERDES_CTRL);
+	if (ret) {
+		ret = hibmc_dp_init(priv);
+		if (ret)
+			drm_err(dev, "failed to init dp: %d\n", ret);
+	}
+
+	ret = hibmc_vdac_init(priv);
+	if (ret) {
+		drm_err(dev, "failed to init vdac: %d\n", ret);
+		return ret;
+	}
+
+	drm_for_each_encoder(encoder, dev)
+		clone_mask |= drm_encoder_mask(encoder);
+
+	drm_for_each_encoder(encoder, dev)
+		encoder->possible_clones = clone_mask;
+
+	return 0;
+}
+
+/*
+ * It can operate in one of three modes: 0, 1 or Sleep.
+ */
+void hibmc_set_power_mode(struct hibmc_drm_private *priv, u32 power_mode)
+{
+	u32 control_value = 0;
+	void __iomem   *mmio = priv->mmio;
+	u32 input = 1;
+
+	if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
+		return;
+
+	if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
+		input = 0;
+
+	control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
+	control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
+			   HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
+	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
+	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
+	writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
+}
+
+void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
+{
+	u32 gate_reg;
+	u32 mode;
+	void __iomem   *mmio = priv->mmio;
+
+	/* Get current power mode. */
+	mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
+		HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
+
+	switch (mode) {
+	case HIBMC_PW_MODE_CTL_MODE_MODE0:
+		gate_reg = HIBMC_MODE0_GATE;
+		break;
+
+	case HIBMC_PW_MODE_CTL_MODE_MODE1:
+		gate_reg = HIBMC_MODE1_GATE;
+		break;
+
+	default:
+		gate_reg = HIBMC_MODE0_GATE;
+		break;
+	}
+	writel(gate, mmio + gate_reg);
+}
+
+static void hibmc_display_ctrl(struct hibmc_drm_private *priv)
+{
+	u32 reg;
+
+	reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+	reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
+	writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+}
+
+static void hibmc_hw_config(struct hibmc_drm_private *priv)
+{
+	u32 reg;
+
+	/* On hardware reset, power mode 0 is default. */
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+
+	hibmc_set_current_gate(priv, reg);
+
+	/*
+	 * Reset the memory controller. If the memory controller
+	 * is not reset in chip,the system might hang when sw accesses
+	 * the memory.The memory should be resetted after
+	 * changing the MXCLK.
+	 */
+	reg = readl(priv->mmio + HIBMC_MISC_CTRL);
+	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
+	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
+	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
+
+	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
+	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
+
+	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
+
+	hibmc_display_ctrl(priv);
+}
+
+static int hibmc_hw_map(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = &priv->dev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	resource_size_t ioaddr, iosize;
+
+	ioaddr = pci_resource_start(pdev, 1);
+	iosize = pci_resource_len(pdev, 1);
+	priv->mmio = devm_ioremap(dev->dev, ioaddr, iosize);
+	if (!priv->mmio) {
+		drm_err(dev, "Cannot map mmio region\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static int hibmc_hw_init(struct hibmc_drm_private *priv)
+{
+	int ret;
+
+	ret = hibmc_hw_map(priv);
+	if (ret)
+		return ret;
+
+	hibmc_hw_config(priv);
+
+	return 0;
+}
+
+static void hibmc_unload(struct drm_device *dev)
+{
+	drm_atomic_helper_shutdown(dev);
+}
+
+static int hibmc_msi_init(struct drm_device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	int valid_irq_num;
+	int irq;
+	int ret;
+
+	ret = pci_alloc_irq_vectors(pdev, HIBMC_MIN_VECTORS,
+				    HIBMC_MAX_VECTORS, PCI_IRQ_MSI);
+	if (ret < 0) {
+		drm_err(dev, "enabling MSI failed: %d\n", ret);
+		return ret;
+	}
+
+	valid_irq_num = ret;
+
+	for (int i = 0; i < valid_irq_num; i++) {
+		irq = pci_irq_vector(pdev, i);
+
+		if (i)
+			/* PCI devices require shared interrupts. */
+			ret = devm_request_threaded_irq(&pdev->dev, irq,
+							hibmc_dp_interrupt,
+							hibmc_dp_hpd_isr,
+							IRQF_SHARED, g_irqs_names_map[i], dev);
+		else
+			ret = devm_request_irq(&pdev->dev, irq, hibmc_interrupt,
+					       IRQF_SHARED, g_irqs_names_map[i], dev);
+		if (ret) {
+			drm_err(dev, "install irq failed: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int hibmc_load(struct drm_device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+	int ret;
+
+	ret = hibmc_hw_init(priv);
+	if (ret)
+		return ret;
+
+	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0),
+				    pci_resource_len(pdev, 0));
+	if (ret) {
+		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
+		return ret;
+	}
+
+	ret = hibmc_kms_init(priv);
+	if (ret)
+		goto err;
+
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		drm_err(dev, "failed to initialize vblank: %d\n", ret);
+		goto err;
+	}
+
+	ret = hibmc_msi_init(dev);
+	if (ret) {
+		drm_err(dev, "hibmc msi init failed, ret:%d\n", ret);
+		goto err;
+	}
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	drmm_kms_helper_poll_init(dev);
+
+	return 0;
+
+err:
+	hibmc_unload(dev);
+	drm_err(dev, "failed to initialize drm driver: %d\n", ret);
+	return ret;
+}
+
+static int hibmc_pci_probe(struct pci_dev *pdev,
+			   const struct pci_device_id *ent)
+{
+	struct hibmc_drm_private *priv;
+	struct drm_device *dev;
+	int ret;
+
+	ret = aperture_remove_conflicting_pci_devices(pdev, hibmc_driver.name);
+	if (ret)
+		return ret;
+
+	priv = devm_drm_dev_alloc(&pdev->dev, &hibmc_driver,
+				  struct hibmc_drm_private, dev);
+	if (IS_ERR(priv)) {
+		DRM_ERROR("failed to allocate drm_device\n");
+		return PTR_ERR(priv);
+	}
+
+	dev = &priv->dev;
+	pci_set_drvdata(pdev, dev);
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		drm_err(dev, "failed to enable pci device: %d\n", ret);
+		goto err_return;
+	}
+
+	pci_set_master(pdev);
+
+	ret = hibmc_load(dev);
+	if (ret) {
+		drm_err(dev, "failed to load hibmc: %d\n", ret);
+		goto err_return;
+	}
+
+	ret = drm_dev_register(dev, 0);
+	if (ret) {
+		drm_err(dev, "failed to register drv for userspace access: %d\n",
+			  ret);
+		goto err_unload;
+	}
+
+	drm_client_setup(dev, NULL);
+
+	return 0;
+
+err_unload:
+	hibmc_unload(dev);
+err_return:
+	return ret;
+}
+
+static void hibmc_pci_remove(struct pci_dev *pdev)
+{
+	struct drm_device *dev = pci_get_drvdata(pdev);
+
+	drm_dev_unregister(dev);
+	hibmc_unload(dev);
+}
+
+static void hibmc_pci_shutdown(struct pci_dev *pdev)
+{
+	hibmc_pci_remove(pdev);
+}
+
+static const struct pci_device_id hibmc_pci_table[] = {
+	{ PCI_VDEVICE(HUAWEI, 0x1711) },
+	{0,}
+};
+
+static struct pci_driver hibmc_pci_driver = {
+	.name =		"hibmc-drm",
+	.id_table =	hibmc_pci_table,
+	.probe =	hibmc_pci_probe,
+	.remove =	hibmc_pci_remove,
+	.shutdown =	hibmc_pci_shutdown,
+	.driver.pm =    &hibmc_pm_ops,
+};
+
+drm_module_pci_driver(hibmc_pci_driver);
+
+MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
+MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
+MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
+MODULE_LICENSE("GPL v2");

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h

@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#ifndef HIBMC_DRM_DRV_H
+#define HIBMC_DRM_DRV_H
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/i2c.h>
+
+#include <drm/drm_framebuffer.h>
+
+#include "dp/dp_hw.h"
+
+#define HIBMC_MIN_VECTORS	1
+#define HIBMC_MAX_VECTORS	2
+
+struct hibmc_vdac {
+	struct drm_device *dev;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	struct i2c_adapter adapter;
+	struct i2c_algo_bit_data bit_data;
+	int phys_status;
+};
+
+struct hibmc_drm_private {
+	/* hw */
+	void __iomem   *mmio;
+
+	/* drm */
+	struct drm_device dev;
+	struct drm_plane primary_plane;
+	struct drm_crtc crtc;
+	struct hibmc_vdac vdac;
+	struct hibmc_dp dp;
+};
+
+static inline struct hibmc_vdac *to_hibmc_vdac(struct drm_connector *connector)
+{
+	return container_of(connector, struct hibmc_vdac, connector);
+}
+
+static inline struct hibmc_dp *to_hibmc_dp(struct drm_connector *connector)
+{
+	return container_of(connector, struct hibmc_dp, connector);
+}
+
+static inline struct hibmc_drm_private *to_hibmc_drm_private(struct drm_device *dev)
+{
+	return container_of(dev, struct hibmc_drm_private, dev);
+}
+
+void hibmc_set_power_mode(struct hibmc_drm_private *priv,
+			  u32 power_mode);
+void hibmc_set_current_gate(struct hibmc_drm_private *priv,
+			    u32 gate);
+
+int hibmc_de_init(struct hibmc_drm_private *priv);
+int hibmc_vdac_init(struct hibmc_drm_private *priv);
+
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_vdac *connector);
+void hibmc_ddc_del(struct hibmc_vdac *vdac);
+
+int hibmc_dp_init(struct hibmc_drm_private *priv);
+
+void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root);
+
+irqreturn_t hibmc_dp_hpd_isr(int irq, void *arg);
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *      Tian Tao <tiantao6@hisilicon.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_probe_helper.h>
+
+#include "hibmc_drm_drv.h"
+
+#define GPIO_DATA		0x0802A0
+#define GPIO_DATA_DIRECTION	0x0802A4
+
+#define I2C_SCL_MASK		BIT(0)
+#define I2C_SDA_MASK		BIT(1)
+
+static void hibmc_set_i2c_signal(void *data, u32 mask, int value)
+{
+	struct hibmc_vdac *vdac = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(vdac->connector.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if (value) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	} else {
+		u32 tmp_data = readl(priv->mmio + GPIO_DATA);
+
+		tmp_data &= ~mask;
+		writel(tmp_data, priv->mmio + GPIO_DATA);
+
+		tmp_dir |= mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+}
+
+static int hibmc_get_i2c_signal(void *data, u32 mask)
+{
+	struct hibmc_vdac *vdac = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(vdac->connector.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if ((tmp_dir & mask) != mask) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+
+	return (readl(priv->mmio + GPIO_DATA) & mask) ? 1 : 0;
+}
+
+static void hibmc_ddc_setsda(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SDA_MASK, state);
+}
+
+static void hibmc_ddc_setscl(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SCL_MASK, state);
+}
+
+static int hibmc_ddc_getsda(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SDA_MASK);
+}
+
+static int hibmc_ddc_getscl(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SCL_MASK);
+}
+
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_vdac *vdac)
+{
+	vdac->adapter.owner = THIS_MODULE;
+	snprintf(vdac->adapter.name, I2C_NAME_SIZE, "HIS i2c bit bus");
+	vdac->adapter.dev.parent = drm_dev->dev;
+	i2c_set_adapdata(&vdac->adapter, vdac);
+	vdac->adapter.algo_data = &vdac->bit_data;
+
+	vdac->bit_data.udelay = 20;
+	vdac->bit_data.timeout = usecs_to_jiffies(2000);
+	vdac->bit_data.data = vdac;
+	vdac->bit_data.setsda = hibmc_ddc_setsda;
+	vdac->bit_data.setscl = hibmc_ddc_setscl;
+	vdac->bit_data.getsda = hibmc_ddc_getsda;
+	vdac->bit_data.getscl = hibmc_ddc_getscl;
+
+	return i2c_bit_add_bus(&vdac->adapter);
+}
+
+void hibmc_ddc_del(struct hibmc_vdac *vdac)
+{
+	i2c_del_adapter(&vdac->adapter);
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h

@@ -0,0 +1,204 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#ifndef HIBMC_DRM_HW_H
+#define HIBMC_DRM_HW_H
+
+/* register definition */
+#define HIBMC_MISC_CTRL				0x4
+
+#define HIBMC_MSCCTL_LOCALMEM_RESET(x)		((x) << 6)
+#define HIBMC_MSCCTL_LOCALMEM_RESET_MASK	0x40
+
+#define HIBMC_CURRENT_GATE			0x000040
+#define HIBMC_CURR_GATE_DISPLAY(x)		((x) << 2)
+#define HIBMC_CURR_GATE_DISPLAY_MASK		0x4
+
+#define HIBMC_CURR_GATE_LOCALMEM(x)		((x) << 1)
+#define HIBMC_CURR_GATE_LOCALMEM_MASK		0x2
+
+#define HIBMC_MODE0_GATE			0x000044
+#define HIBMC_MODE1_GATE			0x000048
+#define HIBMC_POWER_MODE_CTRL			0x00004C
+
+#define HIBMC_PW_MODE_CTL_OSC_INPUT(x)		((x) << 3)
+#define HIBMC_PW_MODE_CTL_OSC_INPUT_MASK	0x8
+
+#define HIBMC_PW_MODE_CTL_MODE(x)		((x) << 0)
+#define HIBMC_PW_MODE_CTL_MODE_MASK		0x03
+#define HIBMC_PW_MODE_CTL_MODE_SHIFT		0
+
+#define HIBMC_PW_MODE_CTL_MODE_MODE0		0
+#define HIBMC_PW_MODE_CTL_MODE_MODE1		1
+#define HIBMC_PW_MODE_CTL_MODE_SLEEP		2
+
+#define HIBMC_PANEL_PLL_CTRL			0x00005C
+#define HIBMC_CRT_PLL_CTRL			0x000060
+
+#define HIBMC_PLL_CTRL_BYPASS(x)		((x) << 18)
+#define HIBMC_PLL_CTRL_BYPASS_MASK		0x40000
+
+#define HIBMC_PLL_CTRL_POWER(x)			((x) << 17)
+#define HIBMC_PLL_CTRL_POWER_MASK		0x20000
+
+#define HIBMC_PLL_CTRL_INPUT(x)			((x) << 16)
+#define HIBMC_PLL_CTRL_INPUT_MASK		0x10000
+
+#define HIBMC_PLL_CTRL_POD(x)			((x) << 14)
+#define HIBMC_PLL_CTRL_POD_MASK			0xC000
+
+#define HIBMC_PLL_CTRL_OD(x)			((x) << 12)
+#define HIBMC_PLL_CTRL_OD_MASK			0x3000
+
+#define HIBMC_PLL_CTRL_N(x)			((x) << 8)
+#define HIBMC_PLL_CTRL_N_MASK			0xF00
+
+#define HIBMC_PLL_CTRL_M(x)			((x) << 0)
+#define HIBMC_PLL_CTRL_M_MASK			0xFF
+
+#define HIBMC_CRT_DISP_CTL			0x80200
+
+#define HIBMC_CRT_DISP_CTL_DPMS(x)		((x) << 30)
+#define HIBMC_CRT_DISP_CTL_DPMS_MASK		0xc0000000
+
+#define HIBMC_CRT_DPMS_ON			0
+#define HIBMC_CRT_DPMS_OFF			3
+
+#define HIBMC_CRT_DISP_CTL_CRTSELECT(x)		((x) << 25)
+#define HIBMC_CRT_DISP_CTL_CRTSELECT_MASK	0x2000000
+
+#define HIBMC_CRTSELECT_CRT			1
+
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE(x)	((x) << 14)
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK	0x4000
+
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE(x)	((x) << 13)
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE_MASK	0x2000
+
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE(x)	((x) << 12)
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE_MASK	0x1000
+
+#define HIBMC_CRT_DISP_CTL_TIMING(x)		((x) << 8)
+#define HIBMC_CRT_DISP_CTL_TIMING_MASK		0x100
+
+#define HIBMC_CTL_DISP_CTL_GAMMA(x)		((x) << 3)
+#define HIBMC_CTL_DISP_CTL_GAMMA_MASK		0x08
+
+#define HIBMC_CRT_DISP_CTL_PLANE(x)		((x) << 2)
+#define HIBMC_CRT_DISP_CTL_PLANE_MASK		4
+
+#define HIBMC_CRT_DISP_CTL_FORMAT(x)		((x) << 0)
+#define HIBMC_CRT_DISP_CTL_FORMAT_MASK		0x03
+
+#define HIBMC_CRT_FB_ADDRESS			0x080204
+
+#define HIBMC_CRT_FB_WIDTH			0x080208
+#define HIBMC_CRT_FB_WIDTH_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_FB_WIDTH_WIDTH_MASK		0x3FFF0000
+#define HIBMC_CRT_FB_WIDTH_OFFS(x)		((x) << 0)
+#define HIBMC_CRT_FB_WIDTH_OFFS_MASK		0x3FFF
+
+#define HIBMC_CRT_HORZ_TOTAL			0x08020C
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL_MASK		0xFFF0000
+
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END_MASK	0xFFF
+
+#define HIBMC_CRT_HORZ_SYNC			0x080210
+#define HIBMC_CRT_HORZ_SYNC_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_SYNC_WIDTH_MASK		0xFF0000
+
+#define HIBMC_CRT_HORZ_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_HORZ_SYNC_START_MASK		0xFFF
+
+#define HIBMC_CRT_VERT_TOTAL			0x080214
+#define HIBMC_CRT_VERT_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_VERT_TOTAL_TOTAL_MASK		0x7FFF0000
+
+#define HIBMC_CRT_VERT_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_VERT_TOTAL_DISP_END_MASK	0x7FF
+
+#define HIBMC_CRT_VERT_SYNC			0x080218
+#define HIBMC_CRT_VERT_SYNC_HEIGHT(x)		((x) << 16)
+#define HIBMC_CRT_VERT_SYNC_HEIGHT_MASK		0x3F0000
+
+#define HIBMC_CRT_VERT_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_VERT_SYNC_START_MASK		0x7FF
+
+/* Auto Centering */
+#define HIBMC_CRT_AUTO_CENTERING_TL		0x080280
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT_MASK	0x7FF
+
+#define HIBMC_CRT_AUTO_CENTERING_BR		0x080284
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT_MASK	0x7FF
+
+/* register to control panel output */
+#define HIBMC_DISPLAY_CONTROL_HISILE		0x80288
+#define HIBMC_DISPLAY_CONTROL_FPVDDEN(x)	((x) << 0)
+#define HIBMC_DISPLAY_CONTROL_PANELDATE(x)	((x) << 1)
+#define HIBMC_DISPLAY_CONTROL_FPEN(x)		((x) << 2)
+#define HIBMC_DISPLAY_CONTROL_VBIASEN(x)	((x) << 3)
+
+#define HIBMC_RAW_INTERRUPT			0x80290
+#define HIBMC_RAW_INTERRUPT_VBLANK(x)		((x) << 2)
+#define HIBMC_RAW_INTERRUPT_VBLANK_MASK		0x4
+
+#define HIBMC_RAW_INTERRUPT_EN			0x80298
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK(x)	((x) << 2)
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK_MASK	0x4
+
+/* register and values for PLL control */
+#define CRT_PLL1_HS				0x802a8
+#define CRT_PLL1_HS_OUTER_BYPASS(x)		((x) << 30)
+#define CRT_PLL1_HS_INTER_BYPASS(x)		((x) << 29)
+#define CRT_PLL1_HS_POWERON(x)			((x) << 24)
+
+#define CRT_PLL1_HS_25MHZ			0x23d40f02
+#define CRT_PLL1_HS_40MHZ			0x23940801
+#define CRT_PLL1_HS_65MHZ			0x23940d01
+#define CRT_PLL1_HS_78MHZ			0x23540F82
+#define CRT_PLL1_HS_74MHZ			0x23941dc2
+#define CRT_PLL1_HS_80MHZ			0x23941001
+#define CRT_PLL1_HS_80MHZ_1152			0x23540fc2
+#define CRT_PLL1_HS_106MHZ			0x237C1641
+#define CRT_PLL1_HS_108MHZ			0x23b41b01
+#define CRT_PLL1_HS_162MHZ			0x23480681
+#define CRT_PLL1_HS_148MHZ			0x23541dc2
+#define CRT_PLL1_HS_193MHZ			0x234807c1
+
+#define CRT_PLL2_HS				0x802ac
+#define CRT_PLL2_HS_25MHZ			0x206B851E
+#define CRT_PLL2_HS_40MHZ			0x30000000
+#define CRT_PLL2_HS_65MHZ			0x40000000
+#define CRT_PLL2_HS_78MHZ			0x50E147AE
+#define CRT_PLL2_HS_74MHZ			0x602B6AE7
+#define CRT_PLL2_HS_80MHZ			0x70000000
+#define CRT_PLL2_HS_106MHZ			0x0075c28f
+#define CRT_PLL2_HS_108MHZ			0x80000000
+#define CRT_PLL2_HS_162MHZ			0xA0000000
+#define CRT_PLL2_HS_148MHZ			0xB0CCCCCD
+#define CRT_PLL2_HS_193MHZ			0xC0872B02
+
+#define HIBMC_CRT_PALETTE                       0x80C00
+
+#define HIBMC_FIELD(field, value) (field(value) & field##_MASK)
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c

@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#include <linux/io.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+static int hibmc_connector_get_modes(struct drm_connector *connector)
+{
+	struct drm_mode_config *mode_config = &connector->dev->mode_config;
+	struct hibmc_vdac *vdac = to_hibmc_vdac(connector);
+	int count;
+
+	if (vdac->phys_status == connector_status_connected) {
+		count = drm_connector_helper_get_modes(connector);
+	} else {
+		drm_edid_connector_update(connector, NULL);
+		count = drm_add_modes_noedid(connector,
+					     mode_config->max_width,
+					     mode_config->max_height);
+		if (count)
+			drm_set_preferred_mode(connector, 1024, 768);
+	}
+
+	return count;
+}
+
+static void hibmc_connector_destroy(struct drm_connector *connector)
+{
+	struct hibmc_vdac *vdac = to_hibmc_vdac(connector);
+
+	hibmc_ddc_del(vdac);
+	drm_connector_cleanup(connector);
+}
+
+static int hibmc_vdac_detect(struct drm_connector *connector,
+			     struct drm_modeset_acquire_ctx *ctx,
+			     bool force)
+{
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(connector->dev);
+	int status = drm_connector_helper_detect_from_ddc(connector, ctx,
+							 force);
+	struct hibmc_vdac *vdac = to_hibmc_vdac(connector);
+
+	if (priv->dp.phys_status == connector_status_connected) {
+		vdac->phys_status = status;
+		return status;
+	}
+
+	if (status != vdac->phys_status)
+		++connector->epoch_counter;
+	vdac->phys_status = status;
+
+	/* When both the DP and VDAC physical status are disconnected,
+	 * the "connected" status is returned to support KVM display.
+	 */
+	return connector_status_connected;
+}
+
+static const struct drm_connector_helper_funcs
+	hibmc_connector_helper_funcs = {
+	.get_modes = hibmc_connector_get_modes,
+	.detect_ctx = hibmc_vdac_detect,
+};
+
+static const struct drm_connector_funcs hibmc_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = hibmc_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+int hibmc_vdac_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = &priv->dev;
+	struct hibmc_vdac *vdac = &priv->vdac;
+	struct drm_encoder *encoder = &vdac->encoder;
+	struct drm_crtc *crtc = &priv->crtc;
+	struct drm_connector *connector = &vdac->connector;
+	int ret;
+
+	ret = hibmc_ddc_create(dev, vdac);
+	if (ret) {
+		drm_err(dev, "failed to create ddc: %d\n", ret);
+		return ret;
+	}
+
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+	ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_DAC, NULL);
+	if (ret) {
+		drm_err(dev, "failed to init encoder: %d\n", ret);
+		goto err;
+	}
+
+	ret = drm_connector_init_with_ddc(dev, connector,
+					  &hibmc_connector_funcs,
+					  DRM_MODE_CONNECTOR_VGA,
+					  &vdac->adapter);
+	if (ret) {
+		drm_err(dev, "failed to init connector: %d\n", ret);
+		goto err;
+	}
+
+	drm_connector_helper_add(connector, &hibmc_connector_helper_funcs);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
+
+	vdac->phys_status = connector_status_disconnected;
+
+	return 0;
+
+err:
+	hibmc_ddc_del(vdac);
+
+	return ret;
+}

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/Kconfig

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_HISI_KIRIN
+	tristate "DRM Support for Hisilicon Kirin series SoCs Platform"
+	depends on DRM && OF && (ARM64 || COMPILE_TEST)
+	select DRM_CLIENT_SELECTION
+	select DRM_KMS_HELPER
+	select DRM_GEM_DMA_HELPER
+	select DRM_MIPI_DSI
+	help
+	  Choose this option if you have a hisilicon Kirin chipsets(hi6220).
+	  If M is selected the module will be called kirin-drm.
+

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/Makefile

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+kirin-drm-y := kirin_drm_drv.o \
+	       kirin_drm_ade.o
+
+obj-$(CONFIG_DRM_HISI_KIRIN) += kirin-drm.o dw_drm_dsi.o
+

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c

@@ -0,0 +1,901 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DesignWare MIPI DSI Host Controller v1.02 driver
+ *
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ *
+ * Author:
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "dw_dsi_reg.h"
+
+#define MAX_TX_ESC_CLK		10
+#define ROUND(x, y)		((x) / (y) + \
+				((x) % (y) * 10 / (y) >= 5 ? 1 : 0))
+#define PHY_REF_CLK_RATE	19200000
+#define PHY_REF_CLK_PERIOD_PS	(1000000000 / (PHY_REF_CLK_RATE / 1000))
+
+#define encoder_to_dsi(encoder) \
+	container_of(encoder, struct dw_dsi, encoder)
+#define host_to_dsi(host) \
+	container_of(host, struct dw_dsi, host)
+
+struct mipi_phy_params {
+	u32 clk_t_lpx;
+	u32 clk_t_hs_prepare;
+	u32 clk_t_hs_zero;
+	u32 clk_t_hs_trial;
+	u32 clk_t_wakeup;
+	u32 data_t_lpx;
+	u32 data_t_hs_prepare;
+	u32 data_t_hs_zero;
+	u32 data_t_hs_trial;
+	u32 data_t_ta_go;
+	u32 data_t_ta_get;
+	u32 data_t_wakeup;
+	u32 hstx_ckg_sel;
+	u32 pll_fbd_div5f;
+	u32 pll_fbd_div1f;
+	u32 pll_fbd_2p;
+	u32 pll_enbwt;
+	u32 pll_fbd_p;
+	u32 pll_fbd_s;
+	u32 pll_pre_div1p;
+	u32 pll_pre_p;
+	u32 pll_vco_750M;
+	u32 pll_lpf_rs;
+	u32 pll_lpf_cs;
+	u32 clklp2hs_time;
+	u32 clkhs2lp_time;
+	u32 lp2hs_time;
+	u32 hs2lp_time;
+	u32 clk_to_data_delay;
+	u32 data_to_clk_delay;
+	u32 lane_byte_clk_kHz;
+	u32 clk_division;
+};
+
+struct dsi_hw_ctx {
+	void __iomem *base;
+	struct clk *pclk;
+};
+
+struct dw_dsi {
+	struct drm_encoder encoder;
+	struct device *dev;
+	struct mipi_dsi_host host;
+	struct drm_display_mode cur_mode;
+	struct dsi_hw_ctx *ctx;
+	struct mipi_phy_params phy;
+
+	u32 lanes;
+	enum mipi_dsi_pixel_format format;
+	unsigned long mode_flags;
+	bool enable;
+};
+
+struct dsi_data {
+	struct dw_dsi dsi;
+	struct dsi_hw_ctx ctx;
+};
+
+struct dsi_phy_range {
+	u32 min_range_kHz;
+	u32 max_range_kHz;
+	u32 pll_vco_750M;
+	u32 hstx_ckg_sel;
+};
+
+static const struct dsi_phy_range dphy_range_info[] = {
+	{   46875,    62500,   1,    7 },
+	{   62500,    93750,   0,    7 },
+	{   93750,   125000,   1,    6 },
+	{  125000,   187500,   0,    6 },
+	{  187500,   250000,   1,    5 },
+	{  250000,   375000,   0,    5 },
+	{  375000,   500000,   1,    4 },
+	{  500000,   750000,   0,    4 },
+	{  750000,  1000000,   1,    0 },
+	{ 1000000,  1500000,   0,    0 }
+};
+
+static u32 dsi_calc_phy_rate(u32 req_kHz, struct mipi_phy_params *phy)
+{
+	u32 ref_clk_ps = PHY_REF_CLK_PERIOD_PS;
+	u32 tmp_kHz = req_kHz;
+	u32 i = 0;
+	u32 q_pll = 1;
+	u32 m_pll = 0;
+	u32 n_pll = 0;
+	u32 r_pll = 1;
+	u32 m_n = 0;
+	u32 m_n_int = 0;
+	u32 f_kHz = 0;
+	u64 temp;
+
+	/*
+	 * Find a rate >= req_kHz.
+	 */
+	do {
+		f_kHz = tmp_kHz;
+
+		for (i = 0; i < ARRAY_SIZE(dphy_range_info); i++)
+			if (f_kHz >= dphy_range_info[i].min_range_kHz &&
+			    f_kHz <= dphy_range_info[i].max_range_kHz)
+				break;
+
+		if (i == ARRAY_SIZE(dphy_range_info)) {
+			DRM_ERROR("%dkHz out of range\n", f_kHz);
+			return 0;
+		}
+
+		phy->pll_vco_750M = dphy_range_info[i].pll_vco_750M;
+		phy->hstx_ckg_sel = dphy_range_info[i].hstx_ckg_sel;
+
+		if (phy->hstx_ckg_sel <= 7 &&
+		    phy->hstx_ckg_sel >= 4)
+			q_pll = 0x10 >> (7 - phy->hstx_ckg_sel);
+
+		temp = f_kHz * (u64)q_pll * (u64)ref_clk_ps;
+		m_n_int = div64_u64_rem(temp, 1000000000, &temp);
+		m_n = div_u64(temp, 100000000);
+
+		if (m_n_int % 2 == 0) {
+			if (m_n * 6 >= 50) {
+				n_pll = 2;
+				m_pll = (m_n_int + 1) * n_pll;
+			} else if (m_n * 6 >= 30) {
+				n_pll = 3;
+				m_pll = m_n_int * n_pll + 2;
+			} else {
+				n_pll = 1;
+				m_pll = m_n_int * n_pll;
+			}
+		} else {
+			if (m_n * 6 >= 50) {
+				n_pll = 1;
+				m_pll = (m_n_int + 1) * n_pll;
+			} else if (m_n * 6 >= 30) {
+				n_pll = 1;
+				m_pll = (m_n_int + 1) * n_pll;
+			} else if (m_n * 6 >= 10) {
+				n_pll = 3;
+				m_pll = m_n_int * n_pll + 1;
+			} else {
+				n_pll = 2;
+				m_pll = m_n_int * n_pll;
+			}
+		}
+
+		if (n_pll == 1) {
+			phy->pll_fbd_p = 0;
+			phy->pll_pre_div1p = 1;
+		} else {
+			phy->pll_fbd_p = n_pll;
+			phy->pll_pre_div1p = 0;
+		}
+
+		if (phy->pll_fbd_2p <= 7 && phy->pll_fbd_2p >= 4)
+			r_pll = 0x10 >> (7 - phy->pll_fbd_2p);
+
+		if (m_pll == 2) {
+			phy->pll_pre_p = 0;
+			phy->pll_fbd_s = 0;
+			phy->pll_fbd_div1f = 0;
+			phy->pll_fbd_div5f = 1;
+		} else if (m_pll >= 2 * 2 * r_pll && m_pll <= 2 * 4 * r_pll) {
+			phy->pll_pre_p = m_pll / (2 * r_pll);
+			phy->pll_fbd_s = 0;
+			phy->pll_fbd_div1f = 1;
+			phy->pll_fbd_div5f = 0;
+		} else if (m_pll >= 2 * 5 * r_pll && m_pll <= 2 * 150 * r_pll) {
+			if (((m_pll / (2 * r_pll)) % 2) == 0) {
+				phy->pll_pre_p =
+					(m_pll / (2 * r_pll)) / 2 - 1;
+				phy->pll_fbd_s =
+					(m_pll / (2 * r_pll)) % 2 + 2;
+			} else {
+				phy->pll_pre_p =
+					(m_pll / (2 * r_pll)) / 2;
+				phy->pll_fbd_s =
+					(m_pll / (2 * r_pll)) % 2;
+			}
+			phy->pll_fbd_div1f = 0;
+			phy->pll_fbd_div5f = 0;
+		} else {
+			phy->pll_pre_p = 0;
+			phy->pll_fbd_s = 0;
+			phy->pll_fbd_div1f = 0;
+			phy->pll_fbd_div5f = 1;
+		}
+
+		f_kHz = div64_u64((u64)1000000000 * (u64)m_pll,
+				  (u64)ref_clk_ps * (u64)n_pll * (u64)q_pll);
+		if (f_kHz >= req_kHz)
+			break;
+
+		tmp_kHz += 10;
+
+	} while (true);
+
+	return f_kHz;
+}
+
+static void dsi_get_phy_params(u32 phy_req_kHz,
+			       struct mipi_phy_params *phy)
+{
+	u32 ref_clk_ps = PHY_REF_CLK_PERIOD_PS;
+	u32 phy_rate_kHz;
+	u32 ui;
+
+	memset(phy, 0, sizeof(*phy));
+
+	phy_rate_kHz = dsi_calc_phy_rate(phy_req_kHz, phy);
+	if (!phy_rate_kHz)
+		return;
+
+	ui = 1000000 / phy_rate_kHz;
+
+	phy->clk_t_lpx = ROUND(50, 8 * ui);
+	phy->clk_t_hs_prepare = ROUND(133, 16 * ui) - 1;
+
+	phy->clk_t_hs_zero = ROUND(262, 8 * ui);
+	phy->clk_t_hs_trial = 2 * (ROUND(60, 8 * ui) - 1);
+	phy->clk_t_wakeup = ROUND(1000000, (ref_clk_ps / 1000) - 1);
+	if (phy->clk_t_wakeup > 0xff)
+		phy->clk_t_wakeup = 0xff;
+	phy->data_t_wakeup = phy->clk_t_wakeup;
+	phy->data_t_lpx = phy->clk_t_lpx;
+	phy->data_t_hs_prepare = ROUND(125 + 10 * ui, 16 * ui) - 1;
+	phy->data_t_hs_zero = ROUND(105 + 6 * ui, 8 * ui);
+	phy->data_t_hs_trial = 2 * (ROUND(60 + 4 * ui, 8 * ui) - 1);
+	phy->data_t_ta_go = 3;
+	phy->data_t_ta_get = 4;
+
+	phy->pll_enbwt = 1;
+	phy->clklp2hs_time = ROUND(407, 8 * ui) + 12;
+	phy->clkhs2lp_time = ROUND(105 + 12 * ui, 8 * ui);
+	phy->lp2hs_time = ROUND(240 + 12 * ui, 8 * ui) + 1;
+	phy->hs2lp_time = phy->clkhs2lp_time;
+	phy->clk_to_data_delay = 1 + phy->clklp2hs_time;
+	phy->data_to_clk_delay = ROUND(60 + 52 * ui, 8 * ui) +
+				phy->clkhs2lp_time;
+
+	phy->lane_byte_clk_kHz = phy_rate_kHz / 8;
+	phy->clk_division =
+		DIV_ROUND_UP(phy->lane_byte_clk_kHz, MAX_TX_ESC_CLK);
+}
+
+static u32 dsi_get_dpi_color_coding(enum mipi_dsi_pixel_format format)
+{
+	u32 val;
+
+	/*
+	 * TODO: only support RGB888 now, to support more
+	 */
+	switch (format) {
+	case MIPI_DSI_FMT_RGB888:
+		val = DSI_24BITS_1;
+		break;
+	default:
+		val = DSI_24BITS_1;
+		break;
+	}
+
+	return val;
+}
+
+/*
+ * dsi phy reg write function
+ */
+static void dsi_phy_tst_set(void __iomem *base, u32 reg, u32 val)
+{
+	u32 reg_write = 0x10000 + reg;
+
+	/*
+	 * latch reg first
+	 */
+	writel(reg_write, base + PHY_TST_CTRL1);
+	writel(0x02, base + PHY_TST_CTRL0);
+	writel(0x00, base + PHY_TST_CTRL0);
+
+	/*
+	 * then latch value
+	 */
+	writel(val, base + PHY_TST_CTRL1);
+	writel(0x02, base + PHY_TST_CTRL0);
+	writel(0x00, base + PHY_TST_CTRL0);
+}
+
+static void dsi_set_phy_timer(void __iomem *base,
+			      struct mipi_phy_params *phy,
+			      u32 lanes)
+{
+	u32 val;
+
+	/*
+	 * Set lane value and phy stop wait time.
+	 */
+	val = (lanes - 1) | (PHY_STOP_WAIT_TIME << 8);
+	writel(val, base + PHY_IF_CFG);
+
+	/*
+	 * Set phy clk division.
+	 */
+	val = readl(base + CLKMGR_CFG) | phy->clk_division;
+	writel(val, base + CLKMGR_CFG);
+
+	/*
+	 * Set lp and hs switching params.
+	 */
+	dw_update_bits(base + PHY_TMR_CFG, 24, MASK(8), phy->hs2lp_time);
+	dw_update_bits(base + PHY_TMR_CFG, 16, MASK(8), phy->lp2hs_time);
+	dw_update_bits(base + PHY_TMR_LPCLK_CFG, 16, MASK(10),
+		       phy->clkhs2lp_time);
+	dw_update_bits(base + PHY_TMR_LPCLK_CFG, 0, MASK(10),
+		       phy->clklp2hs_time);
+	dw_update_bits(base + CLK_DATA_TMR_CFG, 8, MASK(8),
+		       phy->data_to_clk_delay);
+	dw_update_bits(base + CLK_DATA_TMR_CFG, 0, MASK(8),
+		       phy->clk_to_data_delay);
+}
+
+static void dsi_set_mipi_phy(void __iomem *base,
+			     struct mipi_phy_params *phy,
+			     u32 lanes)
+{
+	u32 delay_count;
+	u32 val;
+	u32 i;
+
+	/* phy timer setting */
+	dsi_set_phy_timer(base, phy, lanes);
+
+	/*
+	 * Reset to clean up phy tst params.
+	 */
+	writel(0, base + PHY_RSTZ);
+	writel(0, base + PHY_TST_CTRL0);
+	writel(1, base + PHY_TST_CTRL0);
+	writel(0, base + PHY_TST_CTRL0);
+
+	/*
+	 * Clock lane timing control setting: TLPX, THS-PREPARE,
+	 * THS-ZERO, THS-TRAIL, TWAKEUP.
+	 */
+	dsi_phy_tst_set(base, CLK_TLPX, phy->clk_t_lpx);
+	dsi_phy_tst_set(base, CLK_THS_PREPARE, phy->clk_t_hs_prepare);
+	dsi_phy_tst_set(base, CLK_THS_ZERO, phy->clk_t_hs_zero);
+	dsi_phy_tst_set(base, CLK_THS_TRAIL, phy->clk_t_hs_trial);
+	dsi_phy_tst_set(base, CLK_TWAKEUP, phy->clk_t_wakeup);
+
+	/*
+	 * Data lane timing control setting: TLPX, THS-PREPARE,
+	 * THS-ZERO, THS-TRAIL, TTA-GO, TTA-GET, TWAKEUP.
+	 */
+	for (i = 0; i < lanes; i++) {
+		dsi_phy_tst_set(base, DATA_TLPX(i), phy->data_t_lpx);
+		dsi_phy_tst_set(base, DATA_THS_PREPARE(i),
+				phy->data_t_hs_prepare);
+		dsi_phy_tst_set(base, DATA_THS_ZERO(i), phy->data_t_hs_zero);
+		dsi_phy_tst_set(base, DATA_THS_TRAIL(i), phy->data_t_hs_trial);
+		dsi_phy_tst_set(base, DATA_TTA_GO(i), phy->data_t_ta_go);
+		dsi_phy_tst_set(base, DATA_TTA_GET(i), phy->data_t_ta_get);
+		dsi_phy_tst_set(base, DATA_TWAKEUP(i), phy->data_t_wakeup);
+	}
+
+	/*
+	 * physical configuration: I, pll I, pll II, pll III,
+	 * pll IV, pll V.
+	 */
+	dsi_phy_tst_set(base, PHY_CFG_I, phy->hstx_ckg_sel);
+	val = (phy->pll_fbd_div5f << 5) + (phy->pll_fbd_div1f << 4) +
+				(phy->pll_fbd_2p << 1) + phy->pll_enbwt;
+	dsi_phy_tst_set(base, PHY_CFG_PLL_I, val);
+	dsi_phy_tst_set(base, PHY_CFG_PLL_II, phy->pll_fbd_p);
+	dsi_phy_tst_set(base, PHY_CFG_PLL_III, phy->pll_fbd_s);
+	val = (phy->pll_pre_div1p << 7) + phy->pll_pre_p;
+	dsi_phy_tst_set(base, PHY_CFG_PLL_IV, val);
+	val = (5 << 5) + (phy->pll_vco_750M << 4) + (phy->pll_lpf_rs << 2) +
+		phy->pll_lpf_cs;
+	dsi_phy_tst_set(base, PHY_CFG_PLL_V, val);
+
+	writel(PHY_ENABLECLK, base + PHY_RSTZ);
+	udelay(1);
+	writel(PHY_ENABLECLK | PHY_UNSHUTDOWNZ, base + PHY_RSTZ);
+	udelay(1);
+	writel(PHY_ENABLECLK | PHY_UNRSTZ | PHY_UNSHUTDOWNZ, base + PHY_RSTZ);
+	usleep_range(1000, 1500);
+
+	/*
+	 * wait for phy's clock ready
+	 */
+	delay_count = 100;
+	while (delay_count) {
+		val = readl(base +  PHY_STATUS);
+		if ((BIT(0) | BIT(2)) & val)
+			break;
+
+		udelay(1);
+		delay_count--;
+	}
+
+	if (!delay_count)
+		DRM_INFO("phylock and phystopstateclklane is not ready.\n");
+}
+
+static void dsi_set_mode_timing(void __iomem *base,
+				u32 lane_byte_clk_kHz,
+				struct drm_display_mode *mode,
+				enum mipi_dsi_pixel_format format)
+{
+	u32 hfp, hbp, hsw, vfp, vbp, vsw;
+	u32 hline_time;
+	u32 hsa_time;
+	u32 hbp_time;
+	u32 pixel_clk_kHz;
+	int htot, vtot;
+	u32 val;
+	u64 tmp;
+
+	val = dsi_get_dpi_color_coding(format);
+	writel(val, base + DPI_COLOR_CODING);
+
+	val = (mode->flags & DRM_MODE_FLAG_NHSYNC ? 1 : 0) << 2;
+	val |= (mode->flags & DRM_MODE_FLAG_NVSYNC ? 1 : 0) << 1;
+	writel(val, base +  DPI_CFG_POL);
+
+	/*
+	 * The DSI IP accepts vertical timing using lines as normal,
+	 * but horizontal timing is a mixture of pixel-clocks for the
+	 * active region and byte-lane clocks for the blanking-related
+	 * timings.  hfp is specified as the total hline_time in byte-
+	 * lane clocks minus hsa, hbp and active.
+	 */
+	pixel_clk_kHz = mode->clock;
+	htot = mode->htotal;
+	vtot = mode->vtotal;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hbp = mode->htotal - mode->hsync_end;
+	hsw = mode->hsync_end - mode->hsync_start;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vbp = mode->vtotal - mode->vsync_end;
+	vsw = mode->vsync_end - mode->vsync_start;
+	if (vsw > 15) {
+		DRM_DEBUG_DRIVER("vsw exceeded 15\n");
+		vsw = 15;
+	}
+
+	hsa_time = (hsw * lane_byte_clk_kHz) / pixel_clk_kHz;
+	hbp_time = (hbp * lane_byte_clk_kHz) / pixel_clk_kHz;
+	tmp = (u64)htot * (u64)lane_byte_clk_kHz;
+	hline_time = DIV_ROUND_UP_ULL(tmp, pixel_clk_kHz);
+
+	/* all specified in byte-lane clocks */
+	writel(hsa_time, base + VID_HSA_TIME);
+	writel(hbp_time, base + VID_HBP_TIME);
+	writel(hline_time, base + VID_HLINE_TIME);
+
+	writel(vsw, base + VID_VSA_LINES);
+	writel(vbp, base + VID_VBP_LINES);
+	writel(vfp, base + VID_VFP_LINES);
+	writel(mode->vdisplay, base + VID_VACTIVE_LINES);
+	writel(mode->hdisplay, base + VID_PKT_SIZE);
+
+	DRM_DEBUG_DRIVER("htot=%d, hfp=%d, hbp=%d, hsw=%d\n",
+			 htot, hfp, hbp, hsw);
+	DRM_DEBUG_DRIVER("vtol=%d, vfp=%d, vbp=%d, vsw=%d\n",
+			 vtot, vfp, vbp, vsw);
+	DRM_DEBUG_DRIVER("hsa_time=%d, hbp_time=%d, hline_time=%d\n",
+			 hsa_time, hbp_time, hline_time);
+}
+
+static void dsi_set_video_mode(void __iomem *base, unsigned long flags)
+{
+	u32 val;
+	u32 mode_mask = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+		MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+	u32 non_burst_sync_pulse = MIPI_DSI_MODE_VIDEO |
+		MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+	u32 non_burst_sync_event = MIPI_DSI_MODE_VIDEO;
+
+	/*
+	 * choose video mode type
+	 */
+	if ((flags & mode_mask) == non_burst_sync_pulse)
+		val = DSI_NON_BURST_SYNC_PULSES;
+	else if ((flags & mode_mask) == non_burst_sync_event)
+		val = DSI_NON_BURST_SYNC_EVENTS;
+	else
+		val = DSI_BURST_SYNC_PULSES_1;
+	writel(val, base + VID_MODE_CFG);
+
+	writel(PHY_TXREQUESTCLKHS, base + LPCLK_CTRL);
+	writel(DSI_VIDEO_MODE, base + MODE_CFG);
+}
+
+static void dsi_mipi_init(struct dw_dsi *dsi)
+{
+	struct dsi_hw_ctx *ctx = dsi->ctx;
+	struct mipi_phy_params *phy = &dsi->phy;
+	struct drm_display_mode *mode = &dsi->cur_mode;
+	u32 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	void __iomem *base = ctx->base;
+	u32 dphy_req_kHz;
+
+	/*
+	 * count phy params
+	 */
+	dphy_req_kHz = mode->clock * bpp / dsi->lanes;
+	dsi_get_phy_params(dphy_req_kHz, phy);
+
+	/* reset Core */
+	writel(RESET, base + PWR_UP);
+
+	/* set dsi phy params */
+	dsi_set_mipi_phy(base, phy, dsi->lanes);
+
+	/* set dsi mode timing */
+	dsi_set_mode_timing(base, phy->lane_byte_clk_kHz, mode, dsi->format);
+
+	/* set dsi video mode */
+	dsi_set_video_mode(base, dsi->mode_flags);
+
+	/* dsi wake up */
+	writel(POWERUP, base + PWR_UP);
+
+	DRM_DEBUG_DRIVER("lanes=%d, pixel_clk=%d kHz, bytes_freq=%d kHz\n",
+			 dsi->lanes, mode->clock, phy->lane_byte_clk_kHz);
+}
+
+static void dsi_encoder_disable(struct drm_encoder *encoder)
+{
+	struct dw_dsi *dsi = encoder_to_dsi(encoder);
+	struct dsi_hw_ctx *ctx = dsi->ctx;
+	void __iomem *base = ctx->base;
+
+	if (!dsi->enable)
+		return;
+
+	writel(0, base + PWR_UP);
+	writel(0, base + LPCLK_CTRL);
+	writel(0, base + PHY_RSTZ);
+	clk_disable_unprepare(ctx->pclk);
+
+	dsi->enable = false;
+}
+
+static void dsi_encoder_enable(struct drm_encoder *encoder)
+{
+	struct dw_dsi *dsi = encoder_to_dsi(encoder);
+	struct dsi_hw_ctx *ctx = dsi->ctx;
+	int ret;
+
+	if (dsi->enable)
+		return;
+
+	ret = clk_prepare_enable(ctx->pclk);
+	if (ret) {
+		DRM_ERROR("fail to enable pclk: %d\n", ret);
+		return;
+	}
+
+	dsi_mipi_init(dsi);
+
+	dsi->enable = true;
+}
+
+static enum drm_mode_status dsi_encoder_phy_mode_valid(
+					struct drm_encoder *encoder,
+					const struct drm_display_mode *mode)
+{
+	struct dw_dsi *dsi = encoder_to_dsi(encoder);
+	struct mipi_phy_params phy;
+	u32 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	u32 req_kHz, act_kHz, lane_byte_clk_kHz;
+
+	/* Calculate the lane byte clk using the adjusted mode clk */
+	memset(&phy, 0, sizeof(phy));
+	req_kHz = mode->clock * bpp / dsi->lanes;
+	act_kHz = dsi_calc_phy_rate(req_kHz, &phy);
+	lane_byte_clk_kHz = act_kHz / 8;
+
+	DRM_DEBUG_DRIVER("Checking mode %ix%i-%i@%i clock: %i...",
+			mode->hdisplay, mode->vdisplay, bpp,
+			drm_mode_vrefresh(mode), mode->clock);
+
+	/*
+	 * Make sure the adjusted mode clock and the lane byte clk
+	 * have a common denominator base frequency
+	 */
+	if (mode->clock/dsi->lanes == lane_byte_clk_kHz/3) {
+		DRM_DEBUG_DRIVER("OK!\n");
+		return MODE_OK;
+	}
+
+	DRM_DEBUG_DRIVER("BAD!\n");
+	return MODE_BAD;
+}
+
+static enum drm_mode_status dsi_encoder_mode_valid(struct drm_encoder *encoder,
+					const struct drm_display_mode *mode)
+
+{
+	const struct drm_crtc_helper_funcs *crtc_funcs = NULL;
+	struct drm_crtc *crtc = NULL;
+	struct drm_display_mode adj_mode;
+	enum drm_mode_status ret;
+
+	/*
+	 * The crtc might adjust the mode, so go through the
+	 * possible crtcs (technically just one) and call
+	 * mode_fixup to figure out the adjusted mode before we
+	 * validate it.
+	 */
+	drm_for_each_crtc(crtc, encoder->dev) {
+		/*
+		 * reset adj_mode to the mode value each time,
+		 * so we don't adjust the mode twice
+		 */
+		drm_mode_init(&adj_mode, mode);
+
+		crtc_funcs = crtc->helper_private;
+		if (crtc_funcs && crtc_funcs->mode_fixup)
+			if (!crtc_funcs->mode_fixup(crtc, mode, &adj_mode))
+				return MODE_BAD;
+
+		ret = dsi_encoder_phy_mode_valid(encoder, &adj_mode);
+		if (ret != MODE_OK)
+			return ret;
+	}
+	return MODE_OK;
+}
+
+static void dsi_encoder_mode_set(struct drm_encoder *encoder,
+				 struct drm_display_mode *mode,
+				 struct drm_display_mode *adj_mode)
+{
+	struct dw_dsi *dsi = encoder_to_dsi(encoder);
+
+	drm_mode_copy(&dsi->cur_mode, adj_mode);
+}
+
+static int dsi_encoder_atomic_check(struct drm_encoder *encoder,
+				    struct drm_crtc_state *crtc_state,
+				    struct drm_connector_state *conn_state)
+{
+	/* do nothing */
+	return 0;
+}
+
+static const struct drm_encoder_helper_funcs dw_encoder_helper_funcs = {
+	.atomic_check	= dsi_encoder_atomic_check,
+	.mode_valid	= dsi_encoder_mode_valid,
+	.mode_set	= dsi_encoder_mode_set,
+	.enable		= dsi_encoder_enable,
+	.disable	= dsi_encoder_disable
+};
+
+static int dw_drm_encoder_init(struct device *dev,
+			       struct drm_device *drm_dev,
+			       struct drm_encoder *encoder)
+{
+	int ret;
+	u32 crtc_mask = drm_of_find_possible_crtcs(drm_dev, dev->of_node);
+
+	if (!crtc_mask) {
+		DRM_ERROR("failed to find crtc mask\n");
+		return -EINVAL;
+	}
+
+	encoder->possible_crtcs = crtc_mask;
+	ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_DSI);
+	if (ret) {
+		DRM_ERROR("failed to init dsi encoder\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &dw_encoder_helper_funcs);
+
+	return 0;
+}
+
+static const struct component_ops dsi_ops;
+static int dsi_host_attach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *mdsi)
+{
+	struct dw_dsi *dsi = host_to_dsi(host);
+	struct device *dev = host->dev;
+	int ret;
+
+	if (mdsi->lanes < 1 || mdsi->lanes > 4) {
+		DRM_ERROR("dsi device params invalid\n");
+		return -EINVAL;
+	}
+
+	dsi->lanes = mdsi->lanes;
+	dsi->format = mdsi->format;
+	dsi->mode_flags = mdsi->mode_flags;
+
+	ret = component_add(dev, &dsi_ops);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int dsi_host_detach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *mdsi)
+{
+	struct device *dev = host->dev;
+
+	component_del(dev, &dsi_ops);
+
+	return 0;
+}
+
+static const struct mipi_dsi_host_ops dsi_host_ops = {
+	.attach = dsi_host_attach,
+	.detach = dsi_host_detach,
+};
+
+static int dsi_host_init(struct device *dev, struct dw_dsi *dsi)
+{
+	struct mipi_dsi_host *host = &dsi->host;
+	int ret;
+
+	host->dev = dev;
+	host->ops = &dsi_host_ops;
+	ret = mipi_dsi_host_register(host);
+	if (ret) {
+		DRM_ERROR("failed to register dsi host\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dsi_bridge_init(struct drm_device *dev, struct dw_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct drm_bridge *bridge __free(drm_bridge_put) = NULL;
+	struct device_node *np = dsi->dev->of_node;
+
+	/*
+	 * Get the endpoint node. In our case, dsi has one output port1
+	 * to which the external HDMI bridge is connected.
+	 */
+	bridge = of_drm_get_bridge_by_endpoint(np, 1, 0);
+	if (IS_ERR(bridge))
+		return PTR_ERR(bridge);
+
+	/* associate the bridge to dsi encoder */
+	return drm_bridge_attach(encoder, bridge, NULL, 0);
+}
+
+static int dsi_bind(struct device *dev, struct device *master, void *data)
+{
+	struct dsi_data *ddata = dev_get_drvdata(dev);
+	struct dw_dsi *dsi = &ddata->dsi;
+	struct drm_device *drm_dev = data;
+	int ret;
+
+	ret = dw_drm_encoder_init(dev, drm_dev, &dsi->encoder);
+	if (ret)
+		return ret;
+
+	ret = dsi_bridge_init(drm_dev, dsi);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void dsi_unbind(struct device *dev, struct device *master, void *data)
+{
+	/* do nothing */
+}
+
+static const struct component_ops dsi_ops = {
+	.bind	= dsi_bind,
+	.unbind	= dsi_unbind,
+};
+
+static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
+{
+	struct dsi_hw_ctx *ctx = dsi->ctx;
+
+	ctx->pclk = devm_clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(ctx->pclk)) {
+		DRM_ERROR("failed to get pclk clock\n");
+		return PTR_ERR(ctx->pclk);
+	}
+
+	ctx->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ctx->base)) {
+		DRM_ERROR("failed to remap dsi io region\n");
+		return PTR_ERR(ctx->base);
+	}
+
+	return 0;
+}
+
+static int dsi_probe(struct platform_device *pdev)
+{
+	struct dsi_data *data;
+	struct dw_dsi *dsi;
+	struct dsi_hw_ctx *ctx;
+	int ret;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		DRM_ERROR("failed to allocate dsi data.\n");
+		return -ENOMEM;
+	}
+	dsi = &data->dsi;
+	ctx = &data->ctx;
+	dsi->ctx = ctx;
+	dsi->dev = &pdev->dev;
+
+	ret = dsi_parse_dt(pdev, dsi);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, data);
+
+	ret = dsi_host_init(&pdev->dev, dsi);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void dsi_remove(struct platform_device *pdev)
+{
+	struct dsi_data *data = platform_get_drvdata(pdev);
+	struct dw_dsi *dsi = &data->dsi;
+
+	mipi_dsi_host_unregister(&dsi->host);
+}
+
+static const struct of_device_id dsi_of_match[] = {
+	{.compatible = "hisilicon,hi6220-dsi"},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, dsi_of_match);
+
+static struct platform_driver dsi_driver = {
+	.probe = dsi_probe,
+	.remove = dsi_remove,
+	.driver = {
+		.name = "dw-dsi",
+		.of_match_table = dsi_of_match,
+	},
+};
+
+module_platform_driver(dsi_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
+MODULE_DESCRIPTION("DesignWare MIPI DSI Host Controller v1.02 driver");
+MODULE_LICENSE("GPL v2");

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/dw_dsi_reg.h

@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ */
+
+#ifndef __DW_DSI_REG_H__
+#define __DW_DSI_REG_H__
+
+#include <linux/io.h>
+
+#define MASK(x)				(BIT(x) - 1)
+
+/*
+ * regs
+ */
+#define PWR_UP                  0x04  /* Core power-up */
+#define RESET                   0
+#define POWERUP                 BIT(0)
+#define PHY_IF_CFG              0xA4  /* D-PHY interface configuration */
+#define CLKMGR_CFG              0x08  /* the internal clock dividers */
+#define PHY_RSTZ                0xA0  /* D-PHY reset control */
+#define PHY_ENABLECLK           BIT(2)
+#define PHY_UNRSTZ              BIT(1)
+#define PHY_UNSHUTDOWNZ         BIT(0)
+#define PHY_TST_CTRL0           0xB4  /* D-PHY test interface control 0 */
+#define PHY_TST_CTRL1           0xB8  /* D-PHY test interface control 1 */
+#define CLK_TLPX                0x10
+#define CLK_THS_PREPARE         0x11
+#define CLK_THS_ZERO            0x12
+#define CLK_THS_TRAIL           0x13
+#define CLK_TWAKEUP             0x14
+#define DATA_TLPX(x)            (0x20 + ((x) << 4))
+#define DATA_THS_PREPARE(x)     (0x21 + ((x) << 4))
+#define DATA_THS_ZERO(x)        (0x22 + ((x) << 4))
+#define DATA_THS_TRAIL(x)       (0x23 + ((x) << 4))
+#define DATA_TTA_GO(x)          (0x24 + ((x) << 4))
+#define DATA_TTA_GET(x)         (0x25 + ((x) << 4))
+#define DATA_TWAKEUP(x)         (0x26 + ((x) << 4))
+#define PHY_CFG_I               0x60
+#define PHY_CFG_PLL_I           0x63
+#define PHY_CFG_PLL_II          0x64
+#define PHY_CFG_PLL_III         0x65
+#define PHY_CFG_PLL_IV          0x66
+#define PHY_CFG_PLL_V           0x67
+#define DPI_COLOR_CODING        0x10  /* DPI color coding */
+#define DPI_CFG_POL             0x14  /* DPI polarity configuration */
+#define VID_HSA_TIME            0x48  /* Horizontal Sync Active time */
+#define VID_HBP_TIME            0x4C  /* Horizontal Back Porch time */
+#define VID_HLINE_TIME          0x50  /* Line time */
+#define VID_VSA_LINES           0x54  /* Vertical Sync Active period */
+#define VID_VBP_LINES           0x58  /* Vertical Back Porch period */
+#define VID_VFP_LINES           0x5C  /* Vertical Front Porch period */
+#define VID_VACTIVE_LINES       0x60  /* Vertical resolution */
+#define VID_PKT_SIZE            0x3C  /* Video packet size */
+#define VID_MODE_CFG            0x38  /* Video mode configuration */
+#define PHY_TMR_CFG             0x9C  /* Data lanes timing configuration */
+#define BTA_TO_CNT              0x8C  /* Response timeout definition */
+#define PHY_TMR_LPCLK_CFG       0x98  /* clock lane timing configuration */
+#define CLK_DATA_TMR_CFG        0xCC
+#define LPCLK_CTRL              0x94  /* Low-power in clock lane */
+#define PHY_TXREQUESTCLKHS      BIT(0)
+#define MODE_CFG                0x34  /* Video or Command mode selection */
+#define PHY_STATUS              0xB0  /* D-PHY PPI status interface */
+
+#define	PHY_STOP_WAIT_TIME      0x30
+
+/*
+ * regs relevant enum
+ */
+enum dpi_color_coding {
+	DSI_24BITS_1 = 5,
+};
+
+enum dsi_video_mode_type {
+	DSI_NON_BURST_SYNC_PULSES = 0,
+	DSI_NON_BURST_SYNC_EVENTS,
+	DSI_BURST_SYNC_PULSES_1,
+	DSI_BURST_SYNC_PULSES_2
+};
+
+enum dsi_work_mode {
+	DSI_VIDEO_MODE = 0,
+	DSI_COMMAND_MODE
+};
+
+/*
+ * Register Write/Read Helper functions
+ */
+static inline void dw_update_bits(void __iomem *addr, u32 bit_start,
+				  u32 mask, u32 val)
+{
+	u32 tmp, orig;
+
+	orig = readl(addr);
+	tmp = orig & ~(mask << bit_start);
+	tmp |= (val & mask) << bit_start;
+	writel(tmp, addr);
+}
+
+#endif /* __DW_DRM_DSI_H__ */

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h

@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ */
+
+#ifndef __KIRIN_ADE_REG_H__
+#define __KIRIN_ADE_REG_H__
+
+/*
+ * ADE Registers
+ */
+#define MASK(x)				(BIT_ULL(x) - 1)
+
+#define ADE_CTRL			0x0004
+#define FRM_END_START_OFST		0
+#define FRM_END_START_MASK		MASK(2)
+#define AUTO_CLK_GATE_EN_OFST		0
+#define AUTO_CLK_GATE_EN		BIT(0)
+#define ADE_DISP_SRC_CFG		0x0018
+#define ADE_CTRL1			0x008C
+#define ADE_EN				0x0100
+#define ADE_DISABLE			0
+#define ADE_ENABLE			1
+/* reset and reload regs */
+#define ADE_SOFT_RST_SEL(x)		(0x0078 + (x) * 0x4)
+#define ADE_RELOAD_DIS(x)		(0x00AC + (x) * 0x4)
+#define RDMA_OFST			0
+#define CLIP_OFST			15
+#define SCL_OFST			21
+#define CTRAN_OFST			24
+#define OVLY_OFST			37 /* 32+5 */
+/* channel regs */
+#define RD_CH_CTRL(x)			(0x1004 + (x) * 0x80)
+#define RD_CH_ADDR(x)			(0x1008 + (x) * 0x80)
+#define RD_CH_SIZE(x)			(0x100C + (x) * 0x80)
+#define RD_CH_STRIDE(x)			(0x1010 + (x) * 0x80)
+#define RD_CH_SPACE(x)			(0x1014 + (x) * 0x80)
+#define RD_CH_EN(x)			(0x1020 + (x) * 0x80)
+/* overlay regs */
+#define ADE_OVLY1_TRANS_CFG		0x002C
+#define ADE_OVLY_CTL			0x0098
+#define ADE_OVLY_CH_XY0(x)		(0x2004 + (x) * 4)
+#define ADE_OVLY_CH_XY1(x)		(0x2024 + (x) * 4)
+#define ADE_OVLY_CH_CTL(x)		(0x204C + (x) * 4)
+#define ADE_OVLY_OUTPUT_SIZE(x)		(0x2070 + (x) * 8)
+#define OUTPUT_XSIZE_OFST		16
+#define ADE_OVLYX_CTL(x)		(0x209C + (x) * 4)
+#define CH_OVLY_SEL_OFST(x)		((x) * 4)
+#define CH_OVLY_SEL_MASK		MASK(2)
+#define CH_OVLY_SEL_VAL(x)		((x) + 1)
+#define CH_ALP_MODE_OFST		0
+#define CH_ALP_SEL_OFST			2
+#define CH_UNDER_ALP_SEL_OFST		4
+#define CH_EN_OFST			6
+#define CH_ALP_GBL_OFST			15
+#define CH_SEL_OFST			28
+/* ctran regs */
+#define ADE_CTRAN_DIS(x)		(0x5004 + (x) * 0x100)
+#define CTRAN_BYPASS_ON			1
+#define CTRAN_BYPASS_OFF		0
+#define ADE_CTRAN_IMAGE_SIZE(x)		(0x503C + (x) * 0x100)
+/* clip regs */
+#define ADE_CLIP_DISABLE(x)		(0x6800 + (x) * 0x100)
+#define ADE_CLIP_SIZE0(x)		(0x6804 + (x) * 0x100)
+#define ADE_CLIP_SIZE1(x)		(0x6808 + (x) * 0x100)
+
+/*
+ * LDI Registers
+ */
+#define LDI_HRZ_CTRL0			0x7400
+#define HBP_OFST			20
+#define LDI_HRZ_CTRL1			0x7404
+#define LDI_VRT_CTRL0			0x7408
+#define VBP_OFST			20
+#define LDI_VRT_CTRL1			0x740C
+#define LDI_PLR_CTRL			0x7410
+#define FLAG_NVSYNC			BIT(0)
+#define FLAG_NHSYNC			BIT(1)
+#define FLAG_NPIXCLK			BIT(2)
+#define FLAG_NDE			BIT(3)
+#define LDI_DSP_SIZE			0x7414
+#define VSIZE_OFST			20
+#define LDI_INT_EN			0x741C
+#define FRAME_END_INT_EN_OFST		1
+#define LDI_CTRL			0x7420
+#define BPP_OFST			3
+#define DATA_GATE_EN			BIT(2)
+#define LDI_EN				BIT(0)
+#define LDI_MSK_INT			0x7428
+#define LDI_INT_CLR			0x742C
+#define LDI_WORK_MODE			0x7430
+#define LDI_HDMI_DSI_GT			0x7434
+
+/*
+ * ADE media bus service regs
+ */
+#define ADE0_QOSGENERATOR_MODE		0x010C
+#define QOSGENERATOR_MODE_MASK		MASK(2)
+#define ADE0_QOSGENERATOR_EXTCONTROL	0x0118
+#define SOCKET_QOS_EN			BIT(0)
+#define ADE1_QOSGENERATOR_MODE		0x020C
+#define ADE1_QOSGENERATOR_EXTCONTROL	0x0218
+
+/*
+ * ADE regs relevant enums
+ */
+enum frame_end_start {
+	/* regs take effect in every vsync */
+	REG_EFFECTIVE_IN_VSYNC = 0,
+	/* regs take effect in fist ade en and every frame end */
+	REG_EFFECTIVE_IN_ADEEN_FRMEND,
+	/* regs take effect in ade en immediately */
+	REG_EFFECTIVE_IN_ADEEN,
+	/* regs take effect in first vsync and every frame end */
+	REG_EFFECTIVE_IN_VSYNC_FRMEND
+};
+
+enum ade_fb_format {
+	ADE_RGB_565 = 0,
+	ADE_BGR_565,
+	ADE_XRGB_8888,
+	ADE_XBGR_8888,
+	ADE_ARGB_8888,
+	ADE_ABGR_8888,
+	ADE_RGBA_8888,
+	ADE_BGRA_8888,
+	ADE_RGB_888,
+	ADE_BGR_888 = 9,
+	ADE_FORMAT_UNSUPPORT = 800
+};
+
+enum ade_channel {
+	ADE_CH1 = 0,	/* channel 1 for primary plane */
+	ADE_CH_NUM
+};
+
+enum ade_scale {
+	ADE_SCL1 = 0,
+	ADE_SCL2,
+	ADE_SCL3,
+	ADE_SCL_NUM
+};
+
+enum ade_ctran {
+	ADE_CTRAN1 = 0,
+	ADE_CTRAN2,
+	ADE_CTRAN3,
+	ADE_CTRAN4,
+	ADE_CTRAN5,
+	ADE_CTRAN6,
+	ADE_CTRAN_NUM
+};
+
+enum ade_overlay {
+	ADE_OVLY1 = 0,
+	ADE_OVLY2,
+	ADE_OVLY3,
+	ADE_OVLY_NUM
+};
+
+enum ade_alpha_mode {
+	ADE_ALP_GLOBAL = 0,
+	ADE_ALP_PIXEL,
+	ADE_ALP_PIXEL_AND_GLB
+};
+
+enum ade_alpha_blending_mode {
+	ADE_ALP_MUL_COEFF_0 = 0,	/* alpha */
+	ADE_ALP_MUL_COEFF_1,		/* 1-alpha */
+	ADE_ALP_MUL_COEFF_2,		/* 0 */
+	ADE_ALP_MUL_COEFF_3		/* 1 */
+};
+
+/*
+ * LDI regs relevant enums
+ */
+enum dsi_pclk_en {
+	DSI_PCLK_ON = 0,
+	DSI_PCLK_OFF
+};
+
+enum ldi_output_format {
+	LDI_OUT_RGB_565 = 0,
+	LDI_OUT_RGB_666,
+	LDI_OUT_RGB_888
+};
+
+enum ldi_work_mode {
+	TEST_MODE = 0,
+	NORMAL_MODE
+};
+
+enum ldi_input_source {
+	DISP_SRC_NONE = 0,
+	DISP_SRC_OVLY2,
+	DISP_SRC_DISP,
+	DISP_SRC_ROT,
+	DISP_SRC_SCL2
+};
+
+/*
+ * ADE media bus service relevant enums
+ */
+enum qos_generator_mode {
+	FIXED_MODE = 0,
+	LIMITER_MODE,
+	BYPASS_MODE,
+	REGULATOR_MODE
+};
+
+/*
+ * Register Write/Read Helper functions
+ */
+static inline void ade_update_bits(void __iomem *addr, u32 bit_start,
+				   u32 mask, u32 val)
+{
+	u32 tmp, orig;
+
+	orig = readl(addr);
+	tmp = orig & ~(mask << bit_start);
+	tmp |= (val & mask) << bit_start;
+	writel(tmp, addr);
+}
+
+#endif

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c

@@ -0,0 +1,951 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hisilicon Hi6220 SoC ADE(Advanced Display Engine)'s crtc&plane driver
+ *
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ *
+ * Author:
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#include <video/display_timing.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_fbdev_dma.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "kirin_drm_drv.h"
+#include "kirin_ade_reg.h"
+
+#define OUT_OVLY	ADE_OVLY2 /* output overlay compositor */
+#define ADE_DEBUG	1
+
+
+struct ade_hw_ctx {
+	void __iomem  *base;
+	struct regmap *noc_regmap;
+	struct clk *ade_core_clk;
+	struct clk *media_noc_clk;
+	struct clk *ade_pix_clk;
+	struct reset_control *reset;
+	bool power_on;
+	int irq;
+
+	struct drm_crtc *crtc;
+};
+
+static const struct kirin_format ade_formats[] = {
+	/* 16bpp RGB: */
+	{ DRM_FORMAT_RGB565, ADE_RGB_565 },
+	{ DRM_FORMAT_BGR565, ADE_BGR_565 },
+	/* 24bpp RGB: */
+	{ DRM_FORMAT_RGB888, ADE_RGB_888 },
+	{ DRM_FORMAT_BGR888, ADE_BGR_888 },
+	/* 32bpp [A]RGB: */
+	{ DRM_FORMAT_XRGB8888, ADE_XRGB_8888 },
+	{ DRM_FORMAT_XBGR8888, ADE_XBGR_8888 },
+	{ DRM_FORMAT_RGBA8888, ADE_RGBA_8888 },
+	{ DRM_FORMAT_BGRA8888, ADE_BGRA_8888 },
+	{ DRM_FORMAT_ARGB8888, ADE_ARGB_8888 },
+	{ DRM_FORMAT_ABGR8888, ADE_ABGR_8888 },
+};
+
+static const u32 channel_formats[] = {
+	/* channel 1,2,3,4 */
+	DRM_FORMAT_RGB565, DRM_FORMAT_BGR565, DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888
+};
+
+/* convert from fourcc format to ade format */
+static u32 ade_get_format(u32 pixel_format)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ade_formats); i++)
+		if (ade_formats[i].pixel_format == pixel_format)
+			return ade_formats[i].hw_format;
+
+	/* not found */
+	DRM_ERROR("Not found pixel format!!fourcc_format= %d\n",
+		  pixel_format);
+	return ADE_FORMAT_UNSUPPORT;
+}
+
+static void ade_update_reload_bit(void __iomem *base, u32 bit_num, u32 val)
+{
+	u32 bit_ofst, reg_num;
+
+	bit_ofst = bit_num % 32;
+	reg_num = bit_num / 32;
+
+	ade_update_bits(base + ADE_RELOAD_DIS(reg_num), bit_ofst,
+			MASK(1), !!val);
+}
+
+static u32 ade_read_reload_bit(void __iomem *base, u32 bit_num)
+{
+	u32 tmp, bit_ofst, reg_num;
+
+	bit_ofst = bit_num % 32;
+	reg_num = bit_num / 32;
+
+	tmp = readl(base + ADE_RELOAD_DIS(reg_num));
+	return !!(BIT(bit_ofst) & tmp);
+}
+
+static void ade_init(struct ade_hw_ctx *ctx)
+{
+	void __iomem *base = ctx->base;
+
+	/* enable clk gate */
+	ade_update_bits(base + ADE_CTRL1, AUTO_CLK_GATE_EN_OFST,
+			AUTO_CLK_GATE_EN, ADE_ENABLE);
+	/* clear overlay */
+	writel(0, base + ADE_OVLY1_TRANS_CFG);
+	writel(0, base + ADE_OVLY_CTL);
+	writel(0, base + ADE_OVLYX_CTL(OUT_OVLY));
+	/* clear reset and reload regs */
+	writel(MASK(32), base + ADE_SOFT_RST_SEL(0));
+	writel(MASK(32), base + ADE_SOFT_RST_SEL(1));
+	writel(MASK(32), base + ADE_RELOAD_DIS(0));
+	writel(MASK(32), base + ADE_RELOAD_DIS(1));
+	/*
+	 * for video mode, all the ade registers should
+	 * become effective at frame end.
+	 */
+	ade_update_bits(base + ADE_CTRL, FRM_END_START_OFST,
+			FRM_END_START_MASK, REG_EFFECTIVE_IN_ADEEN_FRMEND);
+}
+
+static bool ade_crtc_mode_fixup(struct drm_crtc *crtc,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+
+	adjusted_mode->clock =
+		clk_round_rate(ctx->ade_pix_clk, mode->clock * 1000) / 1000;
+	return true;
+}
+
+
+static void ade_set_pix_clk(struct ade_hw_ctx *ctx,
+			    struct drm_display_mode *mode,
+			    struct drm_display_mode *adj_mode)
+{
+	u32 clk_Hz = mode->clock * 1000;
+	int ret;
+
+	/*
+	 * Success should be guaranteed in mode_valid call back,
+	 * so failure shouldn't happen here
+	 */
+	ret = clk_set_rate(ctx->ade_pix_clk, clk_Hz);
+	if (ret)
+		DRM_ERROR("failed to set pixel clk %dHz (%d)\n", clk_Hz, ret);
+	adj_mode->clock = clk_get_rate(ctx->ade_pix_clk) / 1000;
+}
+
+static void ade_ldi_set_mode(struct ade_hw_ctx *ctx,
+			     struct drm_display_mode *mode,
+			     struct drm_display_mode *adj_mode)
+{
+	void __iomem *base = ctx->base;
+	u32 width = mode->hdisplay;
+	u32 height = mode->vdisplay;
+	u32 hfp, hbp, hsw, vfp, vbp, vsw;
+	u32 plr_flags;
+
+	plr_flags = (mode->flags & DRM_MODE_FLAG_NVSYNC) ? FLAG_NVSYNC : 0;
+	plr_flags |= (mode->flags & DRM_MODE_FLAG_NHSYNC) ? FLAG_NHSYNC : 0;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hbp = mode->htotal - mode->hsync_end;
+	hsw = mode->hsync_end - mode->hsync_start;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vbp = mode->vtotal - mode->vsync_end;
+	vsw = mode->vsync_end - mode->vsync_start;
+	if (vsw > 15) {
+		DRM_DEBUG_DRIVER("vsw exceeded 15\n");
+		vsw = 15;
+	}
+
+	writel((hbp << HBP_OFST) | hfp, base + LDI_HRZ_CTRL0);
+	 /* the configured value is actual value - 1 */
+	writel(hsw - 1, base + LDI_HRZ_CTRL1);
+	writel((vbp << VBP_OFST) | vfp, base + LDI_VRT_CTRL0);
+	 /* the configured value is actual value - 1 */
+	writel(vsw - 1, base + LDI_VRT_CTRL1);
+	 /* the configured value is actual value - 1 */
+	writel(((height - 1) << VSIZE_OFST) | (width - 1),
+	       base + LDI_DSP_SIZE);
+	writel(plr_flags, base + LDI_PLR_CTRL);
+
+	/* set overlay compositor output size */
+	writel(((width - 1) << OUTPUT_XSIZE_OFST) | (height - 1),
+	       base + ADE_OVLY_OUTPUT_SIZE(OUT_OVLY));
+
+	/* ctran6 setting */
+	writel(CTRAN_BYPASS_ON, base + ADE_CTRAN_DIS(ADE_CTRAN6));
+	 /* the configured value is actual value - 1 */
+	writel(width * height - 1, base + ADE_CTRAN_IMAGE_SIZE(ADE_CTRAN6));
+	ade_update_reload_bit(base, CTRAN_OFST + ADE_CTRAN6, 0);
+
+	ade_set_pix_clk(ctx, mode, adj_mode);
+
+	DRM_DEBUG_DRIVER("set mode: %dx%d\n", width, height);
+}
+
+static int ade_power_up(struct ade_hw_ctx *ctx)
+{
+	int ret;
+
+	ret = clk_prepare_enable(ctx->media_noc_clk);
+	if (ret) {
+		DRM_ERROR("failed to enable media_noc_clk (%d)\n", ret);
+		return ret;
+	}
+
+	ret = reset_control_deassert(ctx->reset);
+	if (ret) {
+		DRM_ERROR("failed to deassert reset\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(ctx->ade_core_clk);
+	if (ret) {
+		DRM_ERROR("failed to enable ade_core_clk (%d)\n", ret);
+		return ret;
+	}
+
+	ade_init(ctx);
+	ctx->power_on = true;
+	return 0;
+}
+
+static void ade_power_down(struct ade_hw_ctx *ctx)
+{
+	void __iomem *base = ctx->base;
+
+	writel(ADE_DISABLE, base + LDI_CTRL);
+	/* dsi pixel off */
+	writel(DSI_PCLK_OFF, base + LDI_HDMI_DSI_GT);
+
+	clk_disable_unprepare(ctx->ade_core_clk);
+	reset_control_assert(ctx->reset);
+	clk_disable_unprepare(ctx->media_noc_clk);
+	ctx->power_on = false;
+}
+
+static void ade_set_medianoc_qos(struct ade_hw_ctx *ctx)
+{
+	struct regmap *map = ctx->noc_regmap;
+
+	regmap_update_bits(map, ADE0_QOSGENERATOR_MODE,
+			   QOSGENERATOR_MODE_MASK, BYPASS_MODE);
+	regmap_update_bits(map, ADE0_QOSGENERATOR_EXTCONTROL,
+			   SOCKET_QOS_EN, SOCKET_QOS_EN);
+
+	regmap_update_bits(map, ADE1_QOSGENERATOR_MODE,
+			   QOSGENERATOR_MODE_MASK, BYPASS_MODE);
+	regmap_update_bits(map, ADE1_QOSGENERATOR_EXTCONTROL,
+			   SOCKET_QOS_EN, SOCKET_QOS_EN);
+}
+
+static int ade_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	void __iomem *base = ctx->base;
+
+	if (!ctx->power_on)
+		(void)ade_power_up(ctx);
+
+	ade_update_bits(base + LDI_INT_EN, FRAME_END_INT_EN_OFST,
+			MASK(1), 1);
+
+	return 0;
+}
+
+static void ade_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	void __iomem *base = ctx->base;
+
+	if (!ctx->power_on) {
+		DRM_ERROR("power is down! vblank disable fail\n");
+		return;
+	}
+
+	ade_update_bits(base + LDI_INT_EN, FRAME_END_INT_EN_OFST,
+			MASK(1), 0);
+}
+
+static irqreturn_t ade_irq_handler(int irq, void *data)
+{
+	struct ade_hw_ctx *ctx = data;
+	struct drm_crtc *crtc = ctx->crtc;
+	void __iomem *base = ctx->base;
+	u32 status;
+
+	status = readl(base + LDI_MSK_INT);
+	DRM_DEBUG_VBL("LDI IRQ: status=0x%X\n", status);
+
+	/* vblank irq */
+	if (status & BIT(FRAME_END_INT_EN_OFST)) {
+		ade_update_bits(base + LDI_INT_CLR, FRAME_END_INT_EN_OFST,
+				MASK(1), 1);
+		drm_crtc_handle_vblank(crtc);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void ade_display_enable(struct ade_hw_ctx *ctx)
+{
+	void __iomem *base = ctx->base;
+	u32 out_fmt = LDI_OUT_RGB_888;
+
+	/* enable output overlay compositor */
+	writel(ADE_ENABLE, base + ADE_OVLYX_CTL(OUT_OVLY));
+	ade_update_reload_bit(base, OVLY_OFST + OUT_OVLY, 0);
+
+	/* display source setting */
+	writel(DISP_SRC_OVLY2, base + ADE_DISP_SRC_CFG);
+
+	/* enable ade */
+	writel(ADE_ENABLE, base + ADE_EN);
+	/* enable ldi */
+	writel(NORMAL_MODE, base + LDI_WORK_MODE);
+	writel((out_fmt << BPP_OFST) | DATA_GATE_EN | LDI_EN,
+	       base + LDI_CTRL);
+	/* dsi pixel on */
+	writel(DSI_PCLK_ON, base + LDI_HDMI_DSI_GT);
+}
+
+#if ADE_DEBUG
+static void ade_rdma_dump_regs(void __iomem *base, u32 ch)
+{
+	u32 reg_ctrl, reg_addr, reg_size, reg_stride, reg_space, reg_en;
+	u32 val;
+
+	reg_ctrl = RD_CH_CTRL(ch);
+	reg_addr = RD_CH_ADDR(ch);
+	reg_size = RD_CH_SIZE(ch);
+	reg_stride = RD_CH_STRIDE(ch);
+	reg_space = RD_CH_SPACE(ch);
+	reg_en = RD_CH_EN(ch);
+
+	val = ade_read_reload_bit(base, RDMA_OFST + ch);
+	DRM_DEBUG_DRIVER("[rdma%d]: reload(%d)\n", ch + 1, val);
+	val = readl(base + reg_ctrl);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_ctrl(0x%08x)\n", ch + 1, val);
+	val = readl(base + reg_addr);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_addr(0x%08x)\n", ch + 1, val);
+	val = readl(base + reg_size);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_size(0x%08x)\n", ch + 1, val);
+	val = readl(base + reg_stride);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_stride(0x%08x)\n", ch + 1, val);
+	val = readl(base + reg_space);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_space(0x%08x)\n", ch + 1, val);
+	val = readl(base + reg_en);
+	DRM_DEBUG_DRIVER("[rdma%d]: reg_en(0x%08x)\n", ch + 1, val);
+}
+
+static void ade_clip_dump_regs(void __iomem *base, u32 ch)
+{
+	u32 val;
+
+	val = ade_read_reload_bit(base, CLIP_OFST + ch);
+	DRM_DEBUG_DRIVER("[clip%d]: reload(%d)\n", ch + 1, val);
+	val = readl(base + ADE_CLIP_DISABLE(ch));
+	DRM_DEBUG_DRIVER("[clip%d]: reg_clip_disable(0x%08x)\n", ch + 1, val);
+	val = readl(base + ADE_CLIP_SIZE0(ch));
+	DRM_DEBUG_DRIVER("[clip%d]: reg_clip_size0(0x%08x)\n", ch + 1, val);
+	val = readl(base + ADE_CLIP_SIZE1(ch));
+	DRM_DEBUG_DRIVER("[clip%d]: reg_clip_size1(0x%08x)\n", ch + 1, val);
+}
+
+static void ade_compositor_routing_dump_regs(void __iomem *base, u32 ch)
+{
+	u8 ovly_ch = 0; /* TODO: Only primary plane now */
+	u32 val;
+
+	val = readl(base + ADE_OVLY_CH_XY0(ovly_ch));
+	DRM_DEBUG_DRIVER("[overlay ch%d]: reg_ch_xy0(0x%08x)\n", ovly_ch, val);
+	val = readl(base + ADE_OVLY_CH_XY1(ovly_ch));
+	DRM_DEBUG_DRIVER("[overlay ch%d]: reg_ch_xy1(0x%08x)\n", ovly_ch, val);
+	val = readl(base + ADE_OVLY_CH_CTL(ovly_ch));
+	DRM_DEBUG_DRIVER("[overlay ch%d]: reg_ch_ctl(0x%08x)\n", ovly_ch, val);
+}
+
+static void ade_dump_overlay_compositor_regs(void __iomem *base, u32 comp)
+{
+	u32 val;
+
+	val = ade_read_reload_bit(base, OVLY_OFST + comp);
+	DRM_DEBUG_DRIVER("[overlay%d]: reload(%d)\n", comp + 1, val);
+	writel(ADE_ENABLE, base + ADE_OVLYX_CTL(comp));
+	DRM_DEBUG_DRIVER("[overlay%d]: reg_ctl(0x%08x)\n", comp + 1, val);
+	val = readl(base + ADE_OVLY_CTL);
+	DRM_DEBUG_DRIVER("ovly_ctl(0x%08x)\n", val);
+}
+
+static void ade_dump_regs(void __iomem *base)
+{
+	u32 i;
+
+	/* dump channel regs */
+	for (i = 0; i < ADE_CH_NUM; i++) {
+		/* dump rdma regs */
+		ade_rdma_dump_regs(base, i);
+
+		/* dump clip regs */
+		ade_clip_dump_regs(base, i);
+
+		/* dump compositor routing regs */
+		ade_compositor_routing_dump_regs(base, i);
+	}
+
+	/* dump overlay compositor regs */
+	ade_dump_overlay_compositor_regs(base, OUT_OVLY);
+}
+#else
+static void ade_dump_regs(void __iomem *base) { }
+#endif
+
+static void ade_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_atomic_commit *state)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	int ret;
+
+	if (kcrtc->enable)
+		return;
+
+	if (!ctx->power_on) {
+		ret = ade_power_up(ctx);
+		if (ret)
+			return;
+	}
+
+	ade_set_medianoc_qos(ctx);
+	ade_display_enable(ctx);
+	ade_dump_regs(ctx->base);
+	drm_crtc_vblank_on(crtc);
+	kcrtc->enable = true;
+}
+
+static void ade_crtc_atomic_disable(struct drm_crtc *crtc,
+				    struct drm_atomic_commit *state)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+
+	if (!kcrtc->enable)
+		return;
+
+	drm_crtc_vblank_off(crtc);
+	ade_power_down(ctx);
+	kcrtc->enable = false;
+}
+
+static void ade_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	struct drm_display_mode *mode = &crtc->state->mode;
+	struct drm_display_mode *adj_mode = &crtc->state->adjusted_mode;
+
+	if (!ctx->power_on)
+		(void)ade_power_up(ctx);
+	ade_ldi_set_mode(ctx, mode, adj_mode);
+}
+
+static void ade_crtc_atomic_begin(struct drm_crtc *crtc,
+				  struct drm_atomic_commit *state)
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	struct drm_display_mode *mode = &crtc->state->mode;
+	struct drm_display_mode *adj_mode = &crtc->state->adjusted_mode;
+
+	if (!ctx->power_on)
+		(void)ade_power_up(ctx);
+	ade_ldi_set_mode(ctx, mode, adj_mode);
+}
+
+static void ade_crtc_atomic_flush(struct drm_crtc *crtc,
+				  struct drm_atomic_commit *state)
+
+{
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
+	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
+	struct drm_pending_vblank_event *event = crtc->state->event;
+	void __iomem *base = ctx->base;
+
+	/* only crtc is enabled regs take effect */
+	if (kcrtc->enable) {
+		ade_dump_regs(base);
+		/* flush ade registers */
+		writel(ADE_ENABLE, base + ADE_EN);
+	}
+
+	if (event) {
+		crtc->state->event = NULL;
+
+		spin_lock_irq(&crtc->dev->event_lock);
+		if (drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, event);
+		else
+			drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+	}
+}
+
+static const struct drm_crtc_helper_funcs ade_crtc_helper_funcs = {
+	.mode_fixup	= ade_crtc_mode_fixup,
+	.mode_set_nofb	= ade_crtc_mode_set_nofb,
+	.atomic_begin	= ade_crtc_atomic_begin,
+	.atomic_flush	= ade_crtc_atomic_flush,
+	.atomic_enable	= ade_crtc_atomic_enable,
+	.atomic_disable	= ade_crtc_atomic_disable,
+};
+
+static const struct drm_crtc_funcs ade_crtc_funcs = {
+	.destroy	= drm_crtc_cleanup,
+	.set_config	= drm_atomic_helper_set_config,
+	.page_flip	= drm_atomic_helper_page_flip,
+	.reset		= drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
+	.enable_vblank	= ade_crtc_enable_vblank,
+	.disable_vblank	= ade_crtc_disable_vblank,
+};
+
+static void ade_rdma_set(void __iomem *base, struct drm_framebuffer *fb,
+			 u32 ch, u32 y, u32 in_h, u32 fmt)
+{
+	struct drm_gem_dma_object *obj = drm_fb_dma_get_gem_obj(fb, 0);
+	u32 reg_ctrl, reg_addr, reg_size, reg_stride, reg_space, reg_en;
+	u32 stride = fb->pitches[0];
+	u32 addr = (u32) obj->dma_addr + y * stride;
+
+	DRM_DEBUG_DRIVER("rdma%d: (y=%d, height=%d), stride=%d, paddr=0x%x\n",
+			 ch + 1, y, in_h, stride, (u32) obj->dma_addr);
+	DRM_DEBUG_DRIVER("addr=0x%x, fb:%dx%d, pixel_format=%d(%p4cc)\n",
+			 addr, fb->width, fb->height, fmt,
+			 &fb->format->format);
+
+	/* get reg offset */
+	reg_ctrl = RD_CH_CTRL(ch);
+	reg_addr = RD_CH_ADDR(ch);
+	reg_size = RD_CH_SIZE(ch);
+	reg_stride = RD_CH_STRIDE(ch);
+	reg_space = RD_CH_SPACE(ch);
+	reg_en = RD_CH_EN(ch);
+
+	/*
+	 * TODO: set rotation
+	 */
+	writel((fmt << 16) & 0x1f0000, base + reg_ctrl);
+	writel(addr, base + reg_addr);
+	writel((in_h << 16) | stride, base + reg_size);
+	writel(stride, base + reg_stride);
+	writel(in_h * stride, base + reg_space);
+	writel(ADE_ENABLE, base + reg_en);
+	ade_update_reload_bit(base, RDMA_OFST + ch, 0);
+}
+
+static void ade_rdma_disable(void __iomem *base, u32 ch)
+{
+	u32 reg_en;
+
+	/* get reg offset */
+	reg_en = RD_CH_EN(ch);
+	writel(0, base + reg_en);
+	ade_update_reload_bit(base, RDMA_OFST + ch, 1);
+}
+
+static void ade_clip_set(void __iomem *base, u32 ch, u32 fb_w, u32 x,
+			 u32 in_w, u32 in_h)
+{
+	u32 disable_val;
+	u32 clip_left;
+	u32 clip_right;
+
+	/*
+	 * clip width, no need to clip height
+	 */
+	if (fb_w == in_w) { /* bypass */
+		disable_val = 1;
+		clip_left = 0;
+		clip_right = 0;
+	} else {
+		disable_val = 0;
+		clip_left = x;
+		clip_right = fb_w - (x + in_w) - 1;
+	}
+
+	DRM_DEBUG_DRIVER("clip%d: clip_left=%d, clip_right=%d\n",
+			 ch + 1, clip_left, clip_right);
+
+	writel(disable_val, base + ADE_CLIP_DISABLE(ch));
+	writel((fb_w - 1) << 16 | (in_h - 1), base + ADE_CLIP_SIZE0(ch));
+	writel(clip_left << 16 | clip_right, base + ADE_CLIP_SIZE1(ch));
+	ade_update_reload_bit(base, CLIP_OFST + ch, 0);
+}
+
+static void ade_clip_disable(void __iomem *base, u32 ch)
+{
+	writel(1, base + ADE_CLIP_DISABLE(ch));
+	ade_update_reload_bit(base, CLIP_OFST + ch, 1);
+}
+
+static bool has_Alpha_channel(int format)
+{
+	switch (format) {
+	case ADE_ARGB_8888:
+	case ADE_ABGR_8888:
+	case ADE_RGBA_8888:
+	case ADE_BGRA_8888:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static void ade_get_blending_params(u32 fmt, u8 glb_alpha, u8 *alp_mode,
+				    u8 *alp_sel, u8 *under_alp_sel)
+{
+	bool has_alpha = has_Alpha_channel(fmt);
+
+	/*
+	 * get alp_mode
+	 */
+	if (has_alpha && glb_alpha < 255)
+		*alp_mode = ADE_ALP_PIXEL_AND_GLB;
+	else if (has_alpha)
+		*alp_mode = ADE_ALP_PIXEL;
+	else
+		*alp_mode = ADE_ALP_GLOBAL;
+
+	/*
+	 * get alp sel
+	 */
+	*alp_sel = ADE_ALP_MUL_COEFF_3; /* 1 */
+	*under_alp_sel = ADE_ALP_MUL_COEFF_2; /* 0 */
+}
+
+static void ade_compositor_routing_set(void __iomem *base, u8 ch,
+				       u32 x0, u32 y0,
+				       u32 in_w, u32 in_h, u32 fmt)
+{
+	u8 ovly_ch = 0; /* TODO: This is the zpos, only one plane now */
+	u8 glb_alpha = 255;
+	u32 x1 = x0 + in_w - 1;
+	u32 y1 = y0 + in_h - 1;
+	u32 val;
+	u8 alp_sel;
+	u8 under_alp_sel;
+	u8 alp_mode;
+
+	ade_get_blending_params(fmt, glb_alpha, &alp_mode, &alp_sel,
+				&under_alp_sel);
+
+	/* overlay routing setting
+	 */
+	writel(x0 << 16 | y0, base + ADE_OVLY_CH_XY0(ovly_ch));
+	writel(x1 << 16 | y1, base + ADE_OVLY_CH_XY1(ovly_ch));
+	val = (ch + 1) << CH_SEL_OFST | BIT(CH_EN_OFST) |
+		alp_sel << CH_ALP_SEL_OFST |
+		under_alp_sel << CH_UNDER_ALP_SEL_OFST |
+		glb_alpha << CH_ALP_GBL_OFST |
+		alp_mode << CH_ALP_MODE_OFST;
+	writel(val, base + ADE_OVLY_CH_CTL(ovly_ch));
+	/* connect this plane/channel to overlay2 compositor */
+	ade_update_bits(base + ADE_OVLY_CTL, CH_OVLY_SEL_OFST(ovly_ch),
+			CH_OVLY_SEL_MASK, CH_OVLY_SEL_VAL(OUT_OVLY));
+}
+
+static void ade_compositor_routing_disable(void __iomem *base, u32 ch)
+{
+	u8 ovly_ch = 0; /* TODO: Only primary plane now */
+
+	/* disable this plane/channel */
+	ade_update_bits(base + ADE_OVLY_CH_CTL(ovly_ch), CH_EN_OFST,
+			MASK(1), 0);
+	/* dis-connect this plane/channel of overlay2 compositor */
+	ade_update_bits(base + ADE_OVLY_CTL, CH_OVLY_SEL_OFST(ovly_ch),
+			CH_OVLY_SEL_MASK, 0);
+}
+
+/*
+ * Typicaly, a channel looks like: DMA-->clip-->scale-->ctrans-->compositor
+ */
+static void ade_update_channel(struct kirin_plane *kplane,
+			       struct drm_framebuffer *fb, int crtc_x,
+			       int crtc_y, unsigned int crtc_w,
+			       unsigned int crtc_h, u32 src_x,
+			       u32 src_y, u32 src_w, u32 src_h)
+{
+	struct ade_hw_ctx *ctx = kplane->hw_ctx;
+	void __iomem *base = ctx->base;
+	u32 fmt = ade_get_format(fb->format->format);
+	u32 ch = kplane->ch;
+	u32 in_w;
+	u32 in_h;
+
+	DRM_DEBUG_DRIVER("channel%d: src:(%d, %d)-%dx%d, crtc:(%d, %d)-%dx%d",
+			 ch + 1, src_x, src_y, src_w, src_h,
+			 crtc_x, crtc_y, crtc_w, crtc_h);
+
+	/* 1) DMA setting */
+	in_w = src_w;
+	in_h = src_h;
+	ade_rdma_set(base, fb, ch, src_y, in_h, fmt);
+
+	/* 2) clip setting */
+	ade_clip_set(base, ch, fb->width, src_x, in_w, in_h);
+
+	/* 3) TODO: scale setting for overlay planes */
+
+	/* 4) TODO: ctran/csc setting for overlay planes */
+
+	/* 5) compositor routing setting */
+	ade_compositor_routing_set(base, ch, crtc_x, crtc_y, in_w, in_h, fmt);
+}
+
+static void ade_disable_channel(struct kirin_plane *kplane)
+{
+	struct ade_hw_ctx *ctx = kplane->hw_ctx;
+	void __iomem *base = ctx->base;
+	u32 ch = kplane->ch;
+
+	DRM_DEBUG_DRIVER("disable channel%d\n", ch + 1);
+
+	/* disable read DMA */
+	ade_rdma_disable(base, ch);
+
+	/* disable clip */
+	ade_clip_disable(base, ch);
+
+	/* disable compositor routing */
+	ade_compositor_routing_disable(base, ch);
+}
+
+static int ade_plane_atomic_check(struct drm_plane *plane,
+				  struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
+										 plane);
+	struct drm_framebuffer *fb = new_plane_state->fb;
+	struct drm_crtc *crtc = new_plane_state->crtc;
+	struct drm_crtc_state *crtc_state;
+	u32 src_x = new_plane_state->src_x >> 16;
+	u32 src_y = new_plane_state->src_y >> 16;
+	u32 src_w = new_plane_state->src_w >> 16;
+	u32 src_h = new_plane_state->src_h >> 16;
+	int crtc_x = new_plane_state->crtc_x;
+	int crtc_y = new_plane_state->crtc_y;
+	u32 crtc_w = new_plane_state->crtc_w;
+	u32 crtc_h = new_plane_state->crtc_h;
+	u32 fmt;
+
+	if (!crtc || !fb)
+		return 0;
+
+	fmt = ade_get_format(fb->format->format);
+	if (fmt == ADE_FORMAT_UNSUPPORT)
+		return -EINVAL;
+
+	crtc_state = drm_atomic_get_crtc_state(state, crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	if (src_w != crtc_w || src_h != crtc_h) {
+		return -EINVAL;
+	}
+
+	if (src_x + src_w > fb->width ||
+	    src_y + src_h > fb->height)
+		return -EINVAL;
+
+	if (crtc_x < 0 || crtc_y < 0)
+		return -EINVAL;
+
+	if (crtc_x + crtc_w > crtc_state->adjusted_mode.hdisplay ||
+	    crtc_y + crtc_h > crtc_state->adjusted_mode.vdisplay)
+		return -EINVAL;
+
+	return 0;
+}
+
+static void ade_plane_atomic_update(struct drm_plane *plane,
+				    struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct kirin_plane *kplane = to_kirin_plane(plane);
+
+	ade_update_channel(kplane, new_state->fb, new_state->crtc_x,
+			   new_state->crtc_y,
+			   new_state->crtc_w, new_state->crtc_h,
+			   new_state->src_x >> 16, new_state->src_y >> 16,
+			   new_state->src_w >> 16, new_state->src_h >> 16);
+}
+
+static void ade_plane_atomic_disable(struct drm_plane *plane,
+				     struct drm_atomic_commit *state)
+{
+	struct kirin_plane *kplane = to_kirin_plane(plane);
+
+	ade_disable_channel(kplane);
+}
+
+static const struct drm_plane_helper_funcs ade_plane_helper_funcs = {
+	.atomic_check = ade_plane_atomic_check,
+	.atomic_update = ade_plane_atomic_update,
+	.atomic_disable = ade_plane_atomic_disable,
+};
+
+static struct drm_plane_funcs ade_plane_funcs = {
+	.update_plane	= drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static void *ade_hw_ctx_alloc(struct platform_device *pdev,
+			      struct drm_crtc *crtc)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = pdev->dev.of_node;
+	struct ade_hw_ctx *ctx = NULL;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx) {
+		DRM_ERROR("failed to alloc ade_hw_ctx\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ctx->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ctx->base)) {
+		DRM_ERROR("failed to remap ade io base\n");
+		return ERR_PTR(-EIO);
+	}
+
+	ctx->reset = devm_reset_control_get(dev, NULL);
+	if (IS_ERR(ctx->reset))
+		return ERR_PTR(-ENODEV);
+
+	ctx->noc_regmap =
+		syscon_regmap_lookup_by_phandle(np, "hisilicon,noc-syscon");
+	if (IS_ERR(ctx->noc_regmap)) {
+		DRM_ERROR("failed to get noc regmap\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	ctx->irq = platform_get_irq(pdev, 0);
+	if (ctx->irq < 0) {
+		DRM_ERROR("failed to get irq\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	ctx->ade_core_clk = devm_clk_get(dev, "clk_ade_core");
+	if (IS_ERR(ctx->ade_core_clk)) {
+		DRM_ERROR("failed to parse clk ADE_CORE\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	ctx->media_noc_clk = devm_clk_get(dev, "clk_codec_jpeg");
+	if (IS_ERR(ctx->media_noc_clk)) {
+		DRM_ERROR("failed to parse clk CODEC_JPEG\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	ctx->ade_pix_clk = devm_clk_get(dev, "clk_ade_pix");
+	if (IS_ERR(ctx->ade_pix_clk)) {
+		DRM_ERROR("failed to parse clk ADE_PIX\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	/* vblank irq init */
+	ret = devm_request_irq(dev, ctx->irq, ade_irq_handler,
+			       IRQF_SHARED, dev->driver->name, ctx);
+	if (ret)
+		return ERR_PTR(-EIO);
+
+	ctx->crtc = crtc;
+
+	return ctx;
+}
+
+static void ade_hw_ctx_cleanup(void *hw_ctx)
+{
+}
+
+static const struct drm_mode_config_funcs ade_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+
+};
+
+DEFINE_DRM_GEM_DMA_FOPS(ade_fops);
+
+static const struct drm_driver ade_driver = {
+	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops = &ade_fops,
+	DRM_GEM_DMA_DRIVER_OPS,
+	DRM_FBDEV_DMA_DRIVER_OPS,
+	.name = "kirin",
+	.desc = "Hisilicon Kirin620 SoC DRM Driver",
+	.major = 1,
+	.minor = 0,
+};
+
+struct kirin_drm_data ade_driver_data = {
+	.num_planes = ADE_CH_NUM,
+	.prim_plane = ADE_CH1,
+	.channel_formats = channel_formats,
+	.channel_formats_cnt = ARRAY_SIZE(channel_formats),
+	.config_max_width = 2048,
+	.config_max_height = 2048,
+	.driver = &ade_driver,
+	.crtc_helper_funcs = &ade_crtc_helper_funcs,
+	.crtc_funcs = &ade_crtc_funcs,
+	.plane_helper_funcs = &ade_plane_helper_funcs,
+	.plane_funcs = &ade_plane_funcs,
+	.mode_config_funcs = &ade_mode_config_funcs,
+
+	.alloc_hw_ctx = ade_hw_ctx_alloc,
+	.cleanup_hw_ctx = ade_hw_ctx_cleanup,
+};

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hisilicon Kirin SoCs drm master driver
+ *
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ *
+ * Author:
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_module.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "kirin_drm_drv.h"
+
+#define KIRIN_MAX_PLANE	2
+
+struct kirin_drm_private {
+	struct kirin_crtc crtc;
+	struct kirin_plane planes[KIRIN_MAX_PLANE];
+	void *hw_ctx;
+};
+
+static int kirin_drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
+			       struct drm_plane *plane,
+			       const struct kirin_drm_data *driver_data)
+{
+	struct device_node *port;
+	int ret;
+
+	/* set crtc port so that
+	 * drm_of_find_possible_crtcs call works
+	 */
+	port = of_get_child_by_name(dev->dev->of_node, "port");
+	if (!port) {
+		DRM_ERROR("no port node found in %pOF\n", dev->dev->of_node);
+		return -EINVAL;
+	}
+	of_node_put(port);
+	crtc->port = port;
+
+	ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
+					driver_data->crtc_funcs, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init crtc.\n");
+		return ret;
+	}
+
+	drm_crtc_helper_add(crtc, driver_data->crtc_helper_funcs);
+
+	return 0;
+}
+
+static int kirin_drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
+				enum drm_plane_type type,
+				const struct kirin_drm_data *data)
+{
+	int ret = 0;
+
+	ret = drm_universal_plane_init(dev, plane, 1, data->plane_funcs,
+				       data->channel_formats,
+				       data->channel_formats_cnt,
+				       NULL, type, NULL);
+	if (ret) {
+		DRM_ERROR("fail to init plane, ch=%d\n", 0);
+		return ret;
+	}
+
+	drm_plane_helper_add(plane, data->plane_helper_funcs);
+
+	return 0;
+}
+
+static void kirin_drm_private_cleanup(struct drm_device *dev)
+{
+	struct kirin_drm_private *kirin_priv = dev->dev_private;
+	struct kirin_drm_data *data;
+
+	data = (struct kirin_drm_data *)of_device_get_match_data(dev->dev);
+	if (data->cleanup_hw_ctx)
+		data->cleanup_hw_ctx(kirin_priv->hw_ctx);
+
+	devm_kfree(dev->dev, kirin_priv);
+	dev->dev_private = NULL;
+}
+
+static int kirin_drm_private_init(struct drm_device *dev,
+				  const struct kirin_drm_data *driver_data)
+{
+	struct platform_device *pdev = to_platform_device(dev->dev);
+	struct kirin_drm_private *kirin_priv;
+	struct drm_plane *prim_plane;
+	enum drm_plane_type type;
+	void *ctx;
+	int ret;
+	u32 ch;
+
+	kirin_priv = devm_kzalloc(dev->dev, sizeof(*kirin_priv), GFP_KERNEL);
+	if (!kirin_priv) {
+		DRM_ERROR("failed to alloc kirin_drm_private\n");
+		return -ENOMEM;
+	}
+
+	ctx = driver_data->alloc_hw_ctx(pdev, &kirin_priv->crtc.base);
+	if (IS_ERR(ctx)) {
+		DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
+		return -EINVAL;
+	}
+	kirin_priv->hw_ctx = ctx;
+
+	/*
+	 * plane init
+	 * TODO: Now only support primary plane, overlay planes
+	 * need to do.
+	 */
+	for (ch = 0; ch < driver_data->num_planes; ch++) {
+		if (ch == driver_data->prim_plane)
+			type = DRM_PLANE_TYPE_PRIMARY;
+		else
+			type = DRM_PLANE_TYPE_OVERLAY;
+		ret = kirin_drm_plane_init(dev, &kirin_priv->planes[ch].base,
+					   type, driver_data);
+		if (ret)
+			return ret;
+		kirin_priv->planes[ch].ch = ch;
+		kirin_priv->planes[ch].hw_ctx = ctx;
+	}
+
+	/* crtc init */
+	prim_plane = &kirin_priv->planes[driver_data->prim_plane].base;
+	ret = kirin_drm_crtc_init(dev, &kirin_priv->crtc.base,
+				  prim_plane, driver_data);
+	if (ret)
+		return ret;
+	kirin_priv->crtc.hw_ctx = ctx;
+	dev->dev_private = kirin_priv;
+
+	return 0;
+}
+
+static int kirin_drm_kms_init(struct drm_device *dev,
+			      const struct kirin_drm_data *driver_data)
+{
+	int ret;
+
+	/* dev->mode_config initialization */
+	drm_mode_config_init(dev);
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = driver_data->config_max_width;
+	dev->mode_config.max_height = driver_data->config_max_width;
+	dev->mode_config.funcs = driver_data->mode_config_funcs;
+
+	/* display controller init */
+	ret = kirin_drm_private_init(dev, driver_data);
+	if (ret)
+		goto err_mode_config_cleanup;
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(dev->dev, dev);
+	if (ret) {
+		DRM_ERROR("failed to bind all component.\n");
+		goto err_private_cleanup;
+	}
+
+	/* vblank init */
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		DRM_ERROR("failed to initialize vblank.\n");
+		goto err_unbind_all;
+	}
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(dev);
+
+	return 0;
+
+err_unbind_all:
+	component_unbind_all(dev->dev, dev);
+err_private_cleanup:
+	kirin_drm_private_cleanup(dev);
+err_mode_config_cleanup:
+	drm_mode_config_cleanup(dev);
+	return ret;
+}
+
+static int kirin_drm_kms_cleanup(struct drm_device *dev)
+{
+	drm_kms_helper_poll_fini(dev);
+	drm_atomic_helper_shutdown(dev);
+	kirin_drm_private_cleanup(dev);
+	drm_mode_config_cleanup(dev);
+
+	return 0;
+}
+
+static int kirin_drm_bind(struct device *dev)
+{
+	struct kirin_drm_data *driver_data;
+	struct drm_device *drm_dev;
+	int ret;
+
+	driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
+	if (!driver_data)
+		return -EINVAL;
+
+	drm_dev = drm_dev_alloc(driver_data->driver, dev);
+	if (IS_ERR(drm_dev))
+		return PTR_ERR(drm_dev);
+	dev_set_drvdata(dev, drm_dev);
+
+	/* display controller init */
+	ret = kirin_drm_kms_init(drm_dev, driver_data);
+	if (ret)
+		goto err_drm_dev_put;
+
+	ret = drm_dev_register(drm_dev, 0);
+	if (ret)
+		goto err_kms_cleanup;
+
+	drm_client_setup(drm_dev, NULL);
+
+	return 0;
+
+err_kms_cleanup:
+	kirin_drm_kms_cleanup(drm_dev);
+err_drm_dev_put:
+	drm_dev_put(drm_dev);
+	dev_set_drvdata(dev, NULL);
+
+	return ret;
+}
+
+static void kirin_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	drm_dev_unregister(drm_dev);
+	kirin_drm_kms_cleanup(drm_dev);
+	drm_dev_put(drm_dev);
+	dev_set_drvdata(dev, NULL);
+}
+
+static const struct component_master_ops kirin_drm_ops = {
+	.bind = kirin_drm_bind,
+	.unbind = kirin_drm_unbind,
+};
+
+static int kirin_drm_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct component_match *match = NULL;
+	struct device_node *remote;
+
+	remote = of_graph_get_remote_node(np, 0, 0);
+	if (!remote)
+		return -ENODEV;
+
+	drm_of_component_match_add(dev, &match, component_compare_of, remote);
+	of_node_put(remote);
+
+	return component_master_add_with_match(dev, &kirin_drm_ops, match);
+}
+
+static void kirin_drm_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &kirin_drm_ops);
+}
+
+static void kirin_drm_platform_shutdown(struct platform_device *pdev)
+{
+	drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
+}
+
+static const struct of_device_id kirin_drm_dt_ids[] = {
+	{ .compatible = "hisilicon,hi6220-ade",
+	  .data = &ade_driver_data,
+	},
+	{ /* end node */ },
+};
+MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
+
+static struct platform_driver kirin_drm_platform_driver = {
+	.probe = kirin_drm_platform_probe,
+	.remove = kirin_drm_platform_remove,
+	.shutdown = kirin_drm_platform_shutdown,
+	.driver = {
+		.name = "kirin-drm",
+		.of_match_table = kirin_drm_dt_ids,
+	},
+};
+
+drm_module_platform_driver(kirin_drm_platform_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
+MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
+MODULE_LICENSE("GPL v2");

linux-7.2.3/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h

@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ */
+
+#ifndef __KIRIN_DRM_DRV_H__
+#define __KIRIN_DRM_DRV_H__
+
+#define to_kirin_crtc(crtc) \
+	container_of(crtc, struct kirin_crtc, base)
+
+#define to_kirin_plane(plane) \
+	container_of(plane, struct kirin_plane, base)
+
+/* kirin-format translate table */
+struct kirin_format {
+	u32 pixel_format;
+	u32 hw_format;
+};
+
+struct kirin_crtc {
+	struct drm_crtc base;
+	void *hw_ctx;
+	bool enable;
+};
+
+struct kirin_plane {
+	struct drm_plane base;
+	void *hw_ctx;
+	u32 ch;
+};
+
+/* display controller init/cleanup ops */
+struct kirin_drm_data {
+	const u32 *channel_formats;
+	u32 channel_formats_cnt;
+	int config_max_width;
+	int config_max_height;
+	u32 num_planes;
+	u32 prim_plane;
+
+	const struct drm_driver *driver;
+	const struct drm_crtc_helper_funcs *crtc_helper_funcs;
+	const struct drm_crtc_funcs *crtc_funcs;
+	const struct drm_plane_helper_funcs *plane_helper_funcs;
+	const struct drm_plane_funcs  *plane_funcs;
+	const struct drm_mode_config_funcs *mode_config_funcs;
+
+	void *(*alloc_hw_ctx)(struct platform_device *pdev,
+			      struct drm_crtc *crtc);
+	void (*cleanup_hw_ctx)(void *hw_ctx);
+};
+
+extern struct kirin_drm_data ade_driver_data;
+
+#endif /* __KIRIN_DRM_DRV_H__ */