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linux-7.2.3/sound/hda/controllers/Kconfig

@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config SND_HDA_INTEL
+	tristate "HD Audio PCI"
+	depends on PCI
+	select SND_HDA
+	select SND_INTEL_DSP_CONFIG
+	help
+	  Say Y here to include support for Intel "High Definition
+	  Audio" (Azalia) and its compatible devices.
+
+	  This option enables the HD-audio controller.  Don't forget
+	  to choose the appropriate HD-audio codec options.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-hda-intel.
+
+config SND_HDA_TEGRA
+	tristate "NVIDIA Tegra HD Audio"
+	depends on ARCH_TEGRA
+	select SND_HDA
+	select SND_HDA_ALIGNED_MMIO
+	help
+	  Say Y here to support the HDA controller present in NVIDIA
+	  Tegra SoCs
+
+	  This options enables support for the HD Audio controller
+	  present in some NVIDIA Tegra SoCs, used to communicate audio
+	  to the HDMI output.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-hda-tegra.
+
+config SND_HDA_CIX_IPBLOQ
+	tristate "CIX IPBLOQ HD Audio"
+	depends on ARCH_CIX || COMPILE_TEST
+	select SND_HDA
+	select SND_HDA_ALIGNED_MMIO
+	help
+	  Say Y here to support the HDA controller present in CIX SoCs
+
+	  This options enables support for the HD Audio controller
+	  present in some CIX SoCs.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-hda-cix-ipbloq.
+
+config SND_HDA_ACPI
+	tristate "HD Audio ACPI"
+	depends on ACPI
+	select SND_HDA
+	help
+	  Say Y here to include support for Azalia-compatible HDA controllers
+	  which are advertised via ACPI objects.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-hda-acpi.

linux-7.2.3/sound/hda/controllers/Makefile

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+snd-hda-intel-y := intel.o
+snd-hda-tegra-y := tegra.o
+snd-hda-cix-ipbloq-y := cix-ipbloq.o
+snd-hda-acpi-y := acpi.o
+
+subdir-ccflags-y += -I$(src)/../common
+
+# for trace-points
+CFLAGS_intel.o := -I$(src)
+
+obj-$(CONFIG_SND_HDA_INTEL) += snd-hda-intel.o
+obj-$(CONFIG_SND_HDA_TEGRA) += snd-hda-tegra.o
+obj-$(CONFIG_SND_HDA_CIX_IPBLOQ) += snd-hda-cix-ipbloq.o
+obj-$(CONFIG_SND_HDA_ACPI) += snd-hda-acpi.o

linux-7.2.3/sound/hda/controllers/acpi.c

@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ALSA driver for ACPI-based HDA Controllers.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+
+#include <sound/hda_codec.h>
+
+#include "hda_controller.h"
+
+struct hda_acpi {
+	struct azx azx;
+	struct snd_card *card;
+	struct platform_device *pdev;
+	void __iomem *regs;
+	struct work_struct probe_work;
+	const struct hda_data *data;
+};
+
+/**
+ * struct hda_data - Optional device-specific data
+ * @short_name: Used for the ALSA card name; defaults to KBUILD_MODNAME
+ * @long_name:  Used for longer description; defaults to short_name
+ * @flags:      Passed to &azx->driver_caps
+ *
+ * A pointer to a record of this type may be stored in the
+ * &acpi_device_id->driver_data field of an ACPI match table entry in order to
+ * customize the naming and behavior of a particular device. All fields are
+ * optional and sensible defaults will be selected in their absence.
+ */
+struct hda_data {
+	const char *short_name;
+	const char *long_name;
+	unsigned long flags;
+};
+
+static int hda_acpi_dev_disconnect(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+
+	chip->bus.shutdown = 1;
+	return 0;
+}
+
+static int hda_acpi_dev_free(struct snd_device *device)
+{
+	struct azx *azx = device->device_data;
+	struct hda_acpi *hda = container_of(azx, struct hda_acpi, azx);
+
+	cancel_work_sync(&hda->probe_work);
+	if (azx_bus(azx)->chip_init) {
+		azx_stop_all_streams(azx);
+		azx_stop_chip(azx);
+	}
+
+	azx_free_stream_pages(azx);
+	azx_free_streams(azx);
+	snd_hdac_bus_exit(azx_bus(azx));
+
+	return 0;
+}
+
+static int hda_acpi_init(struct hda_acpi *hda)
+{
+	struct hdac_bus *bus = azx_bus(&hda->azx);
+	struct snd_card *card = hda->azx.card;
+	struct device *dev = &hda->pdev->dev;
+	struct azx *azx = &hda->azx;
+	struct resource *res;
+	unsigned short gcap;
+	const char *sname, *lname;
+	int err, irq;
+
+	/* The base address for the HDA registers and the interrupt are wrapped
+	 * in an ACPI _CRS object which can be parsed by platform_get_irq() and
+	 * devm_platform_get_and_ioremap_resource()
+	 */
+
+	irq = platform_get_irq(hda->pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	hda->regs = devm_platform_get_and_ioremap_resource(hda->pdev, 0, &res);
+	if (IS_ERR(hda->regs))
+		return PTR_ERR(hda->regs);
+
+	bus->remap_addr = hda->regs;
+	bus->addr = res->start;
+
+	err = devm_request_irq(dev, irq, azx_interrupt,
+			       IRQF_SHARED, KBUILD_MODNAME, azx);
+	if (err) {
+		dev_err(dev, "unable to request IRQ %d, disabling device\n",
+			irq);
+		return err;
+	}
+	bus->irq = irq;
+	bus->dma_stop_delay = 100;
+	card->sync_irq = bus->irq;
+
+	gcap = azx_readw(azx, GCAP);
+	dev_dbg(dev, "chipset global capabilities = 0x%x\n", gcap);
+
+	azx->align_buffer_size = 1;
+
+	azx->capture_streams = (gcap >> 8) & 0x0f;
+	azx->playback_streams = (gcap >> 12) & 0x0f;
+
+	azx->capture_index_offset = 0;
+	azx->playback_index_offset = azx->capture_streams;
+	azx->num_streams = azx->playback_streams + azx->capture_streams;
+
+	err = azx_init_streams(azx);
+	if (err < 0) {
+		dev_err(dev, "failed to initialize streams: %d\n", err);
+		return err;
+	}
+
+	err = azx_alloc_stream_pages(azx);
+	if (err < 0) {
+		dev_err(dev, "failed to allocate stream pages: %d\n", err);
+		return err;
+	}
+
+	azx_init_chip(azx, 1);
+
+	if (!bus->codec_mask) {
+		dev_err(dev, "no codecs found!\n");
+		return -ENODEV;
+	}
+
+	strscpy(card->driver, "hda-acpi");
+
+	sname = hda->data->short_name ? hda->data->short_name : KBUILD_MODNAME;
+
+	if (strlen(sname) > sizeof(card->shortname))
+		dev_info(dev, "truncating shortname for card %s\n", sname);
+	strscpy(card->shortname, sname);
+
+	lname = hda->data->long_name ? hda->data->long_name : sname;
+
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at 0x%lx irq %i", lname, bus->addr, bus->irq);
+
+	return 0;
+}
+
+static void hda_acpi_probe_work(struct work_struct *work)
+{
+	struct hda_acpi *hda = container_of(work, struct hda_acpi, probe_work);
+	struct azx *chip = &hda->azx;
+	int err;
+
+	err = hda_acpi_init(hda);
+	if (err < 0)
+		return;
+
+	err = azx_probe_codecs(chip, 8);
+	if (err < 0)
+		return;
+
+	err = azx_codec_configure(chip);
+	if (err < 0)
+		return;
+
+	err = snd_card_register(chip->card);
+	if (err < 0)
+		return;
+
+	chip->running = 1;
+}
+
+static int hda_acpi_create(struct hda_acpi *hda)
+{
+	static const struct snd_device_ops ops = {
+		.dev_disconnect = hda_acpi_dev_disconnect,
+		.dev_free = hda_acpi_dev_free,
+	};
+	static const struct hda_controller_ops null_ops;
+	struct azx *azx = &hda->azx;
+	int err;
+
+	mutex_init(&azx->open_mutex);
+	azx->card = hda->card;
+	INIT_LIST_HEAD(&azx->pcm_list);
+
+	azx->ops = &null_ops;
+	azx->driver_caps = hda->data->flags;
+	azx->driver_type = hda->data->flags & 0xff;
+	azx->codec_probe_mask = -1;
+
+	err = azx_bus_init(azx, NULL);
+	if (err < 0)
+		return err;
+
+	err = snd_device_new(hda->card, SNDRV_DEV_LOWLEVEL, &hda->azx, &ops);
+	if (err < 0) {
+		dev_err(&hda->pdev->dev, "Error creating device\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int hda_acpi_probe(struct platform_device *pdev)
+{
+	struct hda_acpi *hda;
+	int err;
+
+	hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
+	if (!hda)
+		return -ENOMEM;
+
+	hda->pdev = pdev;
+	hda->data = acpi_device_get_match_data(&pdev->dev);
+
+	/* Fall back to defaults if the table didn't have a *struct hda_data */
+	if (!hda->data)
+		hda->data = devm_kzalloc(&pdev->dev, sizeof(*hda->data),
+					 GFP_KERNEL);
+	if (!hda->data)
+		return -ENOMEM;
+
+	err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+			   THIS_MODULE, 0, &hda->card);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Error creating card!\n");
+		return err;
+	}
+
+	INIT_WORK(&hda->probe_work, hda_acpi_probe_work);
+
+	err = hda_acpi_create(hda);
+	if (err < 0)
+		goto out_free;
+	hda->card->private_data = &hda->azx;
+
+	dev_set_drvdata(&pdev->dev, hda->card);
+
+	schedule_work(&hda->probe_work);
+
+	return 0;
+
+out_free:
+	snd_card_free(hda->card);
+	return err;
+}
+
+static void hda_acpi_remove(struct platform_device *pdev)
+{
+	snd_card_free(dev_get_drvdata(&pdev->dev));
+}
+
+static void hda_acpi_shutdown(struct platform_device *pdev)
+{
+	struct snd_card *card = dev_get_drvdata(&pdev->dev);
+	struct azx *chip;
+
+	if (!card)
+		return;
+	chip = card->private_data;
+	if (chip && chip->running)
+		azx_stop_chip(chip);
+}
+
+static int hda_acpi_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_suspend(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+
+	return 0;
+}
+
+static int hda_acpi_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_resume(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+
+static const struct dev_pm_ops hda_acpi_pm = {
+	SYSTEM_SLEEP_PM_OPS(hda_acpi_suspend, hda_acpi_resume)
+};
+
+static const struct hda_data nvidia_hda_data = {
+	.short_name = "NVIDIA",
+	.long_name = "NVIDIA HDA Controller",
+	.flags = AZX_DCAPS_CORBRP_SELF_CLEAR,
+};
+
+static const struct acpi_device_id hda_acpi_match[] = {
+	{ .id = "NVDA2014", .driver_data = (uintptr_t) &nvidia_hda_data },
+	{ .id = "NVDA2015", .driver_data = (uintptr_t) &nvidia_hda_data },
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, hda_acpi_match);
+
+static struct platform_driver hda_acpi_platform_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.pm = &hda_acpi_pm,
+		.acpi_match_table = hda_acpi_match,
+	},
+	.probe = hda_acpi_probe,
+	.remove = hda_acpi_remove,
+	.shutdown = hda_acpi_shutdown,
+};
+module_platform_driver(hda_acpi_platform_driver);
+
+MODULE_DESCRIPTION("Driver for ACPI-based HDA Controllers");
+MODULE_LICENSE("GPL");

linux-7.2.3/sound/hda/controllers/cix-ipbloq.c

@@ -0,0 +1,434 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2025 Cix Technology Group Co., Ltd.
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/string.h>
+
+#include <sound/hda_codec.h>
+#include "hda_controller.h"
+
+#define CIX_IPBLOQ_JACKPOLL_DEFAULT_TIME_MS		1000
+#define CIX_IPBLOQ_POWER_SAVE_DEFAULT_TIME_MS		100
+
+#define CIX_IPBLOQ_SKY1_ADDR_HOST_TO_HDAC_OFFSET	(-0x90000000ULL)
+
+struct cix_ipbloq_hda {
+	struct azx chip;
+	struct device *dev;
+	void __iomem *regs;
+
+	struct reset_control *reset;
+	struct clk_bulk_data clocks[2];
+	unsigned int nclocks;
+};
+
+static const struct hda_controller_ops cix_ipbloq_hda_ops;
+
+static int cix_ipbloq_hda_dev_disconnect(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+
+	chip->bus.shutdown = 1;
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_dev_free(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+
+	if (azx_bus(chip)->chip_init) {
+		azx_stop_all_streams(chip);
+		azx_stop_chip(chip);
+	}
+
+	azx_free_stream_pages(chip);
+	azx_free_streams(chip);
+	snd_hdac_bus_exit(azx_bus(chip));
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_probe_codec(struct cix_ipbloq_hda *hda)
+{
+	struct azx *chip = &hda->chip;
+	struct hdac_bus *bus = azx_bus(chip);
+	int err;
+
+	to_hda_bus(bus)->bus_probing = 1;
+
+	/* create codec instances */
+	err = azx_probe_codecs(chip, 8);
+	if (err < 0) {
+		dev_err(hda->dev, "probe codecs failed: %d\n", err);
+		return err;
+	}
+
+	err = azx_codec_configure(chip);
+	if (err < 0) {
+		dev_err(hda->dev, "codec configure failed: %d\n", err);
+		return err;
+	}
+
+	err = snd_card_register(chip->card);
+	if (err < 0) {
+		dev_err(hda->dev, "card register failed: %d\n", err);
+		return err;
+	}
+
+	chip->running = 1;
+
+	to_hda_bus(bus)->bus_probing = 0;
+
+	snd_hda_set_power_save(&chip->bus, CIX_IPBLOQ_POWER_SAVE_DEFAULT_TIME_MS);
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_init(struct cix_ipbloq_hda *hda,
+			       struct azx *chip,
+			       struct platform_device *pdev)
+{
+	const char *sname = NULL, *drv_name = "cix-ipbloq-hda";
+	struct hdac_bus *bus = azx_bus(chip);
+	struct snd_card *card = chip->card;
+	struct resource *res;
+	unsigned short gcap;
+	int irq_id, err;
+
+	hda->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(hda->regs)) {
+		dev_err(hda->dev, "failed to get and ioremap resource\n");
+		return PTR_ERR(hda->regs);
+	}
+	bus->remap_addr = hda->regs;
+	bus->addr = res->start;
+
+	irq_id = platform_get_irq(pdev, 0);
+	if (irq_id < 0)
+		return irq_id;
+
+	err = devm_request_irq(hda->dev, irq_id, azx_interrupt,
+			       0, KBUILD_MODNAME, chip);
+	if (err < 0)
+		return dev_err_probe(hda->dev, err,
+				     "unable to request IRQ %d : err = %d\n", irq_id, err);
+	bus->irq = irq_id;
+	card->sync_irq = bus->irq;
+
+	gcap = azx_readw(chip, GCAP);
+	chip->capture_streams = (gcap >> 8) & 0x0f;
+	chip->playback_streams = (gcap >> 12) & 0x0f;
+	chip->capture_index_offset = 0;
+	chip->playback_index_offset = chip->capture_streams;
+	chip->num_streams = chip->playback_streams + chip->capture_streams;
+
+	/* initialize streams */
+	err = azx_init_streams(chip);
+	if (err < 0) {
+		dev_err(hda->dev, "failed to initialize streams: %d\n", err);
+		return err;
+	}
+
+	err = azx_alloc_stream_pages(chip);
+	if (err < 0) {
+		dev_err(hda->dev, "failed to allocate stream pages: %d\n", err);
+		return err;
+	}
+
+	/* initialize chip */
+	azx_init_chip(chip, 1);
+
+	/* codec detection */
+	if (!bus->codec_mask) {
+		dev_err(hda->dev, "no codecs found\n");
+		return -ENODEV;
+	}
+	dev_dbg(card->dev, "codec detection mask = 0x%lx\n", bus->codec_mask);
+
+	/* driver name */
+	strscpy(card->driver, drv_name, sizeof(card->driver));
+
+	/* shortname for card */
+	sname = of_get_property(pdev->dev.of_node, "model", NULL);
+	if (!sname)
+		sname = drv_name;
+	if (strlen(sname) > sizeof(card->shortname))
+		dev_dbg(card->dev, "truncating shortname for card\n");
+	strscpy(card->shortname, sname, sizeof(card->shortname));
+
+	/* longname for card */
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at 0x%lx irq %i",
+		 card->shortname, bus->addr, bus->irq);
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_create(struct cix_ipbloq_hda *hda,
+				 struct snd_card *card,
+				 unsigned int driver_caps)
+{
+	static const struct snd_device_ops ops = {
+		.dev_disconnect = cix_ipbloq_hda_dev_disconnect,
+		.dev_free = cix_ipbloq_hda_dev_free,
+	};
+	struct azx *chip;
+	int err;
+
+	chip = &hda->chip;
+	chip->card = card;
+	chip->ops = &cix_ipbloq_hda_ops;
+	chip->driver_caps = driver_caps;
+	chip->driver_type = driver_caps & 0xff;
+	chip->dev_index = 0;
+	chip->single_cmd = 0;
+	chip->codec_probe_mask = -1;
+	chip->align_buffer_size = 1;
+	chip->jackpoll_interval = msecs_to_jiffies(CIX_IPBLOQ_JACKPOLL_DEFAULT_TIME_MS);
+	mutex_init(&chip->open_mutex);
+	INIT_LIST_HEAD(&chip->pcm_list);
+
+	/*
+	 * HD-audio controllers appear pretty inaccurate about the update-IRQ timing.
+	 * The IRQ is issued before actually the data is processed. So use stream
+	 * link position by default instead of dma position buffer.
+	 */
+	chip->get_position[0] = chip->get_position[1] = azx_get_pos_lpib;
+
+	err = azx_bus_init(chip, NULL);
+	if (err < 0) {
+		dev_err(hda->dev, "failed to init bus, err = %d\n", err);
+		return err;
+	}
+
+	/* RIRBSTS.RINTFL cannot be cleared, cause interrupt storm */
+	chip->bus.core.polling_mode = 1;
+	chip->bus.core.not_use_interrupts = 1;
+
+	chip->bus.core.aligned_mmio = 1;
+	chip->bus.core.dma_stop_delay = 100;
+	chip->bus.core.addr_offset = (dma_addr_t)CIX_IPBLOQ_SKY1_ADDR_HOST_TO_HDAC_OFFSET;
+
+	chip->bus.jackpoll_in_suspend = 1;
+
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0) {
+		dev_err(card->dev, "failed to create device, err = %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_probe(struct platform_device *pdev)
+{
+	const unsigned int driver_flags = AZX_DCAPS_PM_RUNTIME;
+	struct cix_ipbloq_hda *hda;
+	struct snd_card *card;
+	struct azx *chip;
+	int err;
+
+	hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
+	if (!hda)
+		return -ENOMEM;
+	hda->dev = &pdev->dev;
+
+	hda->reset = devm_reset_control_get(hda->dev, NULL);
+	if (IS_ERR(hda->reset))
+		return dev_err_probe(hda->dev, PTR_ERR(hda->reset),
+				     "failed to get reset, err = %ld\n", PTR_ERR(hda->reset));
+
+	hda->clocks[hda->nclocks++].id = "ipg";
+	hda->clocks[hda->nclocks++].id = "per";
+	err = devm_clk_bulk_get(hda->dev, hda->nclocks, hda->clocks);
+	if (err < 0)
+		return dev_err_probe(hda->dev, err, "failed to get clk, err = %d\n", err);
+
+	dma_set_mask_and_coherent(hda->dev, DMA_BIT_MASK(32));
+
+	err = of_reserved_mem_device_init(hda->dev);
+	if (err < 0 && err != -ENODEV) {
+		dev_err(hda->dev,
+			"failed to init reserved mem for DMA, err = %d\n", err);
+		return err;
+	}
+
+	err = snd_card_new(hda->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+			   THIS_MODULE, 0, &card);
+	if (err < 0)
+		return dev_err_probe(hda->dev, err, "failed to crate card, err = %d\n", err);
+
+	err = cix_ipbloq_hda_create(hda, card, driver_flags);
+	if (err < 0)
+		goto out_free_card;
+
+	chip = &hda->chip;
+	card->private_data = chip;
+	dev_set_drvdata(hda->dev, card);
+
+	pm_runtime_enable(hda->dev);
+	if (!azx_has_pm_runtime(chip))
+		pm_runtime_forbid(hda->dev);
+
+	err = pm_runtime_resume_and_get(hda->dev);
+	if (err < 0) {
+		dev_err(hda->dev, "runtime resume and get failed, err = %d\n", err);
+		goto out_free_device;
+	}
+
+	err = cix_ipbloq_hda_init(hda, chip, pdev);
+	if (err < 0)
+		goto out_free_device;
+
+	err = cix_ipbloq_hda_probe_codec(hda);
+	if (err < 0)
+		goto out_free_device;
+
+	pm_runtime_put(hda->dev);
+
+	return 0;
+
+out_free_device:
+	snd_device_free(card, chip);
+out_free_card:
+	snd_card_free(card);
+
+	return err;
+}
+
+static void cix_ipbloq_hda_remove(struct platform_device *pdev)
+{
+	struct snd_card *card = dev_get_drvdata(&pdev->dev);
+	struct azx *chip = card->private_data;
+
+	snd_device_free(card, chip);
+	snd_card_free(card);
+
+	pm_runtime_disable(&pdev->dev);
+}
+
+static void cix_ipbloq_hda_shutdown(struct platform_device *pdev)
+{
+	struct snd_card *card = dev_get_drvdata(&pdev->dev);
+	struct azx *chip;
+
+	if (!card)
+		return;
+
+	chip = card->private_data;
+	if (chip && chip->running)
+		azx_stop_chip(chip);
+}
+
+static int cix_ipbloq_hda_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_suspend(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_resume(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_runtime_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct cix_ipbloq_hda *hda = container_of(chip, struct cix_ipbloq_hda, chip);
+
+	if (chip && chip->running) {
+		azx_stop_chip(chip);
+		azx_enter_link_reset(chip);
+	}
+
+	clk_bulk_disable_unprepare(hda->nclocks, hda->clocks);
+
+	return 0;
+}
+
+static int cix_ipbloq_hda_runtime_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct cix_ipbloq_hda *hda = container_of(chip, struct cix_ipbloq_hda, chip);
+	int rc;
+
+	rc = clk_bulk_prepare_enable(hda->nclocks, hda->clocks);
+	if (rc) {
+		dev_err(dev, "failed to enable clk bulk, rc: %d\n", rc);
+		return rc;
+	}
+
+	rc = reset_control_assert(hda->reset);
+	if (rc) {
+		dev_err(dev, "failed to assert reset, rc: %d\n", rc);
+		return rc;
+	}
+
+	rc = reset_control_deassert(hda->reset);
+	if (rc) {
+		dev_err(dev, "failed to deassert reset, rc: %d\n", rc);
+		return rc;
+	}
+
+	if (chip && chip->running)
+		azx_init_chip(chip, 1);
+
+	return 0;
+}
+
+static const struct dev_pm_ops cix_ipbloq_hda_pm = {
+	SYSTEM_SLEEP_PM_OPS(cix_ipbloq_hda_suspend,
+			    cix_ipbloq_hda_resume)
+	RUNTIME_PM_OPS(cix_ipbloq_hda_runtime_suspend,
+		       cix_ipbloq_hda_runtime_resume, NULL)
+};
+
+static const struct of_device_id cix_ipbloq_hda_match[] = {
+	{ .compatible = "cix,sky1-ipbloq-hda" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, cix_ipbloq_hda_match);
+
+static struct platform_driver cix_ipbloq_hda_driver = {
+	.driver = {
+		.name = "cix-ipbloq-hda",
+		.pm = pm_ptr(&cix_ipbloq_hda_pm),
+		.of_match_table = cix_ipbloq_hda_match,
+	},
+	.probe = cix_ipbloq_hda_probe,
+	.remove = cix_ipbloq_hda_remove,
+	.shutdown = cix_ipbloq_hda_shutdown,
+};
+module_platform_driver(cix_ipbloq_hda_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("CIX IPBLOQ HDA bus driver");
+MODULE_AUTHOR("Joakim Zhang <joakim.zhang@cixtech.com>");

linux-7.2.3/sound/hda/controllers/intel.h

@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ */
+#ifndef __SOUND_HDA_INTEL_H
+#define __SOUND_HDA_INTEL_H
+
+#include "hda_controller.h"
+
+struct hda_intel {
+	struct azx chip;
+
+	/* sync probing */
+	struct completion probe_wait;
+	struct delayed_work probe_work;
+
+	/* card list (for power_save trigger) */
+	struct list_head list;
+
+	/* extra flags */
+	unsigned int irq_pending_warned:1;
+	unsigned int probe_continued:1;
+	unsigned int runtime_pm_disabled:1;
+
+	/* vga_switcheroo setup */
+	unsigned int use_vga_switcheroo:1;
+	unsigned int vga_switcheroo_registered:1;
+	unsigned int init_failed:1; /* delayed init failed */
+	unsigned int freed:1; /* resources already released */
+
+	bool need_i915_power:1; /* the hda controller needs i915 power */
+
+	int probe_retry;	/* being probe-retry */
+};
+
+struct hda_intel_stream {
+	struct azx_dev azx_dev;
+
+	/* for pending irqs */
+	struct hda_intel *hda;
+	struct work_struct irq_pending_work;
+	bool irq_pending;
+};
+
+#define azx_dev_to_istream(azx_dev) \
+	container_of(azx_dev, struct hda_intel_stream, azx_dev)
+
+#endif

linux-7.2.3/sound/hda/controllers/intel_trace.h

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hda_intel
+#define TRACE_INCLUDE_FILE intel_trace
+
+#if !defined(_TRACE_HDA_INTEL_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HDA_INTEL_H
+
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(hda_pm,
+	TP_PROTO(struct azx *chip),
+
+	TP_ARGS(chip),
+
+	TP_STRUCT__entry(
+		__field(int, dev_index)
+	),
+
+	TP_fast_assign(
+		__entry->dev_index = (chip)->dev_index;
+	),
+
+	TP_printk("card index: %d", __entry->dev_index)
+);
+
+DEFINE_EVENT(hda_pm, azx_suspend,
+	TP_PROTO(struct azx *chip),
+	TP_ARGS(chip)
+);
+
+DEFINE_EVENT(hda_pm, azx_resume,
+	TP_PROTO(struct azx *chip),
+	TP_ARGS(chip)
+);
+
+DEFINE_EVENT(hda_pm, azx_runtime_suspend,
+	TP_PROTO(struct azx *chip),
+	TP_ARGS(chip)
+);
+
+DEFINE_EVENT(hda_pm, azx_runtime_resume,
+	TP_PROTO(struct azx *chip),
+	TP_ARGS(chip)
+);
+
+#endif /* _TRACE_HDA_INTEL_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#include <trace/define_trace.h>

linux-7.2.3/sound/hda/controllers/tegra.c

@@ -0,0 +1,648 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * Implementation of primary ALSA driver code base for NVIDIA Tegra HDA.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/pm_runtime.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+
+#include <sound/hda_codec.h>
+#include "hda_controller.h"
+
+/* Defines for Nvidia Tegra HDA support */
+#define HDA_BAR0           0x8000
+
+#define HDA_CFG_CMD        0x1004
+#define HDA_CFG_BAR0       0x1010
+
+#define HDA_ENABLE_IO_SPACE       (1 << 0)
+#define HDA_ENABLE_MEM_SPACE      (1 << 1)
+#define HDA_ENABLE_BUS_MASTER     (1 << 2)
+#define HDA_ENABLE_SERR           (1 << 8)
+#define HDA_DISABLE_INTR          (1 << 10)
+#define HDA_BAR0_INIT_PROGRAM     0xFFFFFFFF
+#define HDA_BAR0_FINAL_PROGRAM    (1 << 14)
+
+/* IPFS */
+#define HDA_IPFS_CONFIG           0x180
+#define HDA_IPFS_EN_FPCI          0x1
+
+#define HDA_IPFS_FPCI_BAR0        0x80
+#define HDA_FPCI_BAR0_START       0x40
+
+#define HDA_IPFS_INTR_MASK        0x188
+#define HDA_IPFS_EN_INTR          (1 << 16)
+
+/* FPCI */
+#define FPCI_DBG_CFG_2		  0x10F4
+#define FPCI_GCAP_NSDO_SHIFT	  18
+#define FPCI_GCAP_NSDO_MASK	  (0x3 << FPCI_GCAP_NSDO_SHIFT)
+
+/* max number of SDs */
+#define NUM_CAPTURE_SD 1
+#define NUM_PLAYBACK_SD 1
+
+/*
+ * Tegra194 does not reflect correct number of SDO lines. Below macro
+ * is used to update the GCAP register to workaround the issue.
+ */
+#define TEGRA194_NUM_SDO_LINES	  4
+
+struct hda_tegra_soc {
+	bool has_hda2codec_2x_reset;
+	bool has_hda2hdmi;
+	bool has_hda2codec_2x;
+	bool input_stream;
+	bool always_on;
+	bool requires_init;
+};
+
+struct hda_tegra {
+	struct azx chip;
+	struct device *dev;
+	struct reset_control_bulk_data resets[3];
+	struct clk_bulk_data clocks[3];
+	unsigned int nresets;
+	unsigned int nclocks;
+	void __iomem *regs;
+	struct work_struct probe_work;
+	const struct hda_tegra_soc *soc;
+};
+
+#ifdef CONFIG_PM
+static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
+module_param(power_save, bint, 0644);
+MODULE_PARM_DESC(power_save,
+		 "Automatic power-saving timeout (in seconds, 0 = disable).");
+#else
+#define power_save	0
+#endif
+
+static const struct hda_controller_ops hda_tegra_ops; /* nothing special */
+
+static void hda_tegra_init(struct hda_tegra *hda)
+{
+	u32 v;
+
+	/* Enable PCI access */
+	v = readl(hda->regs + HDA_IPFS_CONFIG);
+	v |= HDA_IPFS_EN_FPCI;
+	writel(v, hda->regs + HDA_IPFS_CONFIG);
+
+	/* Enable MEM/IO space and bus master */
+	v = readl(hda->regs + HDA_CFG_CMD);
+	v &= ~HDA_DISABLE_INTR;
+	v |= HDA_ENABLE_MEM_SPACE | HDA_ENABLE_IO_SPACE |
+		HDA_ENABLE_BUS_MASTER | HDA_ENABLE_SERR;
+	writel(v, hda->regs + HDA_CFG_CMD);
+
+	writel(HDA_BAR0_INIT_PROGRAM, hda->regs + HDA_CFG_BAR0);
+	writel(HDA_BAR0_FINAL_PROGRAM, hda->regs + HDA_CFG_BAR0);
+	writel(HDA_FPCI_BAR0_START, hda->regs + HDA_IPFS_FPCI_BAR0);
+
+	v = readl(hda->regs + HDA_IPFS_INTR_MASK);
+	v |= HDA_IPFS_EN_INTR;
+	writel(v, hda->regs + HDA_IPFS_INTR_MASK);
+}
+
+/*
+ * power management
+ */
+static int hda_tegra_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_suspend(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+
+	return 0;
+}
+
+static int hda_tegra_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	int rc;
+
+	rc = pm_runtime_force_resume(dev);
+	if (rc < 0)
+		return rc;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+
+static int hda_tegra_runtime_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+
+	if (chip && chip->running) {
+		/* enable controller wake up event */
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
+			   STATESTS_INT_MASK);
+
+		azx_stop_chip(chip);
+		azx_enter_link_reset(chip);
+	}
+	clk_bulk_disable_unprepare(hda->nclocks, hda->clocks);
+
+	return 0;
+}
+
+static int hda_tegra_runtime_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+	int rc;
+
+	if (!chip->running) {
+		rc = reset_control_bulk_assert(hda->nresets, hda->resets);
+		if (rc)
+			return rc;
+	}
+
+	rc = clk_bulk_prepare_enable(hda->nclocks, hda->clocks);
+	if (rc != 0)
+		return rc;
+	if (chip->running) {
+		if (hda->soc->requires_init)
+			hda_tegra_init(hda);
+
+		azx_init_chip(chip, 1);
+		/* disable controller wake up event*/
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
+			   ~STATESTS_INT_MASK);
+	} else {
+		usleep_range(10, 100);
+
+		rc = reset_control_bulk_deassert(hda->nresets, hda->resets);
+		if (rc)
+			return rc;
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops hda_tegra_pm = {
+	SYSTEM_SLEEP_PM_OPS(hda_tegra_suspend, hda_tegra_resume)
+	RUNTIME_PM_OPS(hda_tegra_runtime_suspend, hda_tegra_runtime_resume, NULL)
+};
+
+static int hda_tegra_dev_disconnect(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+
+	chip->bus.shutdown = 1;
+	return 0;
+}
+
+/*
+ * destructor
+ */
+static int hda_tegra_dev_free(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+
+	cancel_work_sync(&hda->probe_work);
+	if (azx_bus(chip)->chip_init) {
+		azx_stop_all_streams(chip);
+		azx_stop_chip(chip);
+	}
+
+	azx_free_stream_pages(chip);
+	azx_free_streams(chip);
+	snd_hdac_bus_exit(azx_bus(chip));
+
+	return 0;
+}
+
+static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev)
+{
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+	struct hdac_bus *bus = azx_bus(chip);
+	struct resource *res;
+
+	hda->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(hda->regs))
+		return PTR_ERR(hda->regs);
+
+	bus->remap_addr = hda->regs + HDA_BAR0;
+	bus->addr = res->start + HDA_BAR0;
+
+	if (hda->soc->requires_init)
+		hda_tegra_init(hda);
+
+	return 0;
+}
+
+static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
+{
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+	struct hdac_bus *bus = azx_bus(chip);
+	struct snd_card *card = chip->card;
+	int err;
+	unsigned short gcap;
+	int irq_id = platform_get_irq(pdev, 0);
+	const char *sname, *drv_name = "tegra-hda";
+	struct device_node *np = pdev->dev.of_node;
+
+	if (irq_id < 0)
+		return irq_id;
+
+	err = hda_tegra_init_chip(chip, pdev);
+	if (err)
+		return err;
+
+	err = devm_request_irq(chip->card->dev, irq_id, azx_interrupt,
+			     IRQF_SHARED, KBUILD_MODNAME, chip);
+	if (err) {
+		dev_err(chip->card->dev,
+			"unable to request IRQ %d, disabling device\n",
+			irq_id);
+		return err;
+	}
+	bus->irq = irq_id;
+	bus->dma_stop_delay = 100;
+	card->sync_irq = bus->irq;
+
+	/*
+	 * Tegra194 has 4 SDO lines and the STRIPE can be used to
+	 * indicate how many of the SDO lines the stream should be
+	 * striped. But GCAP register does not reflect the true
+	 * capability of HW. Below workaround helps to fix this.
+	 *
+	 * GCAP_NSDO is bits 19:18 in T_AZA_DBG_CFG_2,
+	 * 0 for 1 SDO, 1 for 2 SDO, 2 for 4 SDO lines.
+	 */
+	if (of_device_is_compatible(np, "nvidia,tegra194-hda")) {
+		u32 val;
+
+		dev_info(card->dev, "Override SDO lines to %u\n",
+			 TEGRA194_NUM_SDO_LINES);
+
+		val = readl(hda->regs + FPCI_DBG_CFG_2) & ~FPCI_GCAP_NSDO_MASK;
+		val |= (TEGRA194_NUM_SDO_LINES >> 1) << FPCI_GCAP_NSDO_SHIFT;
+		writel(val, hda->regs + FPCI_DBG_CFG_2);
+	}
+
+	gcap = azx_readw(chip, GCAP);
+	dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap);
+
+	chip->align_buffer_size = 1;
+
+	/* read number of streams from GCAP register instead of using
+	 * hardcoded value
+	 */
+	chip->capture_streams = (gcap >> 8) & 0x0f;
+
+	/* The GCAP register on Tegra234 implies no Input Streams(ISS) support,
+	 * but the HW output stream descriptor programming should start with
+	 * offset 0x20*4 from base stream descriptor address. This will be a
+	 * problem while calculating the offset for output stream descriptor
+	 * which will be considering input stream also. So here output stream
+	 * starts with offset 0 which is wrong as HW register for output stream
+	 * offset starts with 4.
+	 */
+	if (!hda->soc->input_stream)
+		chip->capture_streams = 4;
+
+	chip->playback_streams = (gcap >> 12) & 0x0f;
+	if (!chip->playback_streams && !chip->capture_streams) {
+		/* gcap didn't give any info, switching to old method */
+		chip->playback_streams = NUM_PLAYBACK_SD;
+		chip->capture_streams = NUM_CAPTURE_SD;
+	}
+	chip->capture_index_offset = 0;
+	chip->playback_index_offset = chip->capture_streams;
+	chip->num_streams = chip->playback_streams + chip->capture_streams;
+
+	/* initialize streams */
+	err = azx_init_streams(chip);
+	if (err < 0) {
+		dev_err(card->dev, "failed to initialize streams: %d\n", err);
+		return err;
+	}
+
+	err = azx_alloc_stream_pages(chip);
+	if (err < 0) {
+		dev_err(card->dev, "failed to allocate stream pages: %d\n",
+			err);
+		return err;
+	}
+
+	/* initialize chip */
+	azx_init_chip(chip, 1);
+
+	/*
+	 * Playback (for 44.1K/48K, 2-channel, 16-bps) fails with
+	 * 4 SDO lines due to legacy design limitation. Following
+	 * is, from HD Audio Specification (Revision 1.0a), used to
+	 * control striping of the stream across multiple SDO lines
+	 * for sample rates <= 48K.
+	 *
+	 * { ((num_channels * bits_per_sample) / number of SDOs) >= 8 }
+	 *
+	 * Due to legacy design issue it is recommended that above
+	 * ratio must be greater than 8. Since number of SDO lines is
+	 * in powers of 2, next available ratio is 16 which can be
+	 * used as a limiting factor here.
+	 */
+	if (of_device_is_compatible(np, "nvidia,tegra30-hda"))
+		chip->bus.core.sdo_limit = 16;
+
+	/* codec detection */
+	if (!bus->codec_mask) {
+		dev_err(card->dev, "no codecs found!\n");
+		return -ENODEV;
+	}
+
+	/* driver name */
+	strscpy(card->driver, drv_name);
+	/* shortname for card */
+	sname = of_get_property(np, "nvidia,model", NULL);
+	if (!sname)
+		sname = drv_name;
+	if (strlen(sname) > sizeof(card->shortname))
+		dev_info(card->dev, "truncating shortname for card\n");
+	strscpy(card->shortname, sname);
+
+	/* longname for card */
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at 0x%lx irq %i",
+		 card->shortname, bus->addr, bus->irq);
+
+	return 0;
+}
+
+/*
+ * constructor
+ */
+
+static void hda_tegra_probe_work(struct work_struct *work);
+
+static int hda_tegra_create(struct snd_card *card,
+			    unsigned int driver_caps,
+			    struct hda_tegra *hda)
+{
+	static const struct snd_device_ops ops = {
+		.dev_disconnect = hda_tegra_dev_disconnect,
+		.dev_free = hda_tegra_dev_free,
+	};
+	struct azx *chip;
+	int err;
+
+	chip = &hda->chip;
+
+	mutex_init(&chip->open_mutex);
+	chip->card = card;
+	chip->ops = &hda_tegra_ops;
+	chip->driver_caps = driver_caps;
+	chip->driver_type = driver_caps & 0xff;
+	chip->dev_index = 0;
+	INIT_LIST_HEAD(&chip->pcm_list);
+
+	chip->codec_probe_mask = -1;
+
+	chip->single_cmd = false;
+	chip->snoop = true;
+
+	INIT_WORK(&hda->probe_work, hda_tegra_probe_work);
+
+	err = azx_bus_init(chip, NULL);
+	if (err < 0)
+		return err;
+
+	chip->bus.core.sync_write = 0;
+	chip->bus.core.needs_damn_long_delay = 1;
+	chip->bus.core.aligned_mmio = 1;
+
+	/*
+	 * HDA power domain and clocks are always on for Tegra264 and
+	 * the jack detection logic would work always, so no need of
+	 * jack polling mechanism running.
+	 */
+	if (!hda->soc->always_on) {
+		chip->jackpoll_interval = msecs_to_jiffies(5000);
+		chip->bus.jackpoll_in_suspend = 1;
+	}
+
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0) {
+		dev_err(card->dev, "Error creating device\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct hda_tegra_soc tegra30_data = {
+	.has_hda2codec_2x_reset = true,
+	.has_hda2hdmi = true,
+	.has_hda2codec_2x = true,
+	.input_stream = true,
+	.always_on = false,
+	.requires_init = true,
+};
+
+static const struct hda_tegra_soc tegra194_data = {
+	.has_hda2codec_2x_reset = false,
+	.has_hda2hdmi = true,
+	.has_hda2codec_2x = true,
+	.input_stream = true,
+	.always_on = false,
+	.requires_init = true,
+};
+
+static const struct hda_tegra_soc tegra234_data = {
+	.has_hda2codec_2x_reset = true,
+	.has_hda2hdmi = false,
+	.has_hda2codec_2x = true,
+	.input_stream = false,
+	.always_on = false,
+	.requires_init = true,
+};
+
+static const struct hda_tegra_soc tegra264_data = {
+	.has_hda2codec_2x_reset = true,
+	.has_hda2hdmi = false,
+	.has_hda2codec_2x = false,
+	.input_stream = false,
+	.always_on = true,
+	.requires_init = false,
+};
+
+static const struct of_device_id hda_tegra_match[] = {
+	{ .compatible = "nvidia,tegra30-hda", .data = &tegra30_data },
+	{ .compatible = "nvidia,tegra194-hda", .data = &tegra194_data },
+	{ .compatible = "nvidia,tegra234-hda", .data = &tegra234_data },
+	{ .compatible = "nvidia,tegra264-hda", .data = &tegra264_data },
+	{},
+};
+MODULE_DEVICE_TABLE(of, hda_tegra_match);
+
+static int hda_tegra_probe(struct platform_device *pdev)
+{
+	const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR |
+					  AZX_DCAPS_PM_RUNTIME |
+					  AZX_DCAPS_4K_BDLE_BOUNDARY;
+	struct snd_card *card;
+	struct azx *chip;
+	struct hda_tegra *hda;
+	int err;
+
+	hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
+	if (!hda)
+		return -ENOMEM;
+	hda->dev = &pdev->dev;
+	chip = &hda->chip;
+
+	hda->soc = of_device_get_match_data(&pdev->dev);
+
+	err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+			   THIS_MODULE, 0, &card);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Error creating card!\n");
+		return err;
+	}
+
+	hda->resets[hda->nresets++].id = "hda";
+
+	/*
+	 * "hda2hdmi" is not applicable for Tegra234. This is because the
+	 * codec is separate IP and not under display SOR partition now.
+	 */
+	if (hda->soc->has_hda2hdmi)
+		hda->resets[hda->nresets++].id = "hda2hdmi";
+
+	/*
+	 * "hda2codec_2x" reset is not present on Tegra194. Though DT would
+	 * be updated to reflect this, but to have backward compatibility
+	 * below is necessary.
+	 */
+	if (hda->soc->has_hda2codec_2x_reset)
+		hda->resets[hda->nresets++].id = "hda2codec_2x";
+
+	err = devm_reset_control_bulk_get_exclusive(&pdev->dev, hda->nresets,
+						    hda->resets);
+	if (err)
+		goto out_free;
+
+	hda->clocks[hda->nclocks++].id = "hda";
+	if (hda->soc->has_hda2hdmi)
+		hda->clocks[hda->nclocks++].id = "hda2hdmi";
+
+	if (hda->soc->has_hda2codec_2x)
+		hda->clocks[hda->nclocks++].id = "hda2codec_2x";
+
+	err = devm_clk_bulk_get(&pdev->dev, hda->nclocks, hda->clocks);
+	if (err < 0)
+		goto out_free;
+
+	err = hda_tegra_create(card, driver_flags, hda);
+	if (err < 0)
+		goto out_free;
+	card->private_data = chip;
+
+	dev_set_drvdata(&pdev->dev, card);
+
+	pm_runtime_enable(hda->dev);
+	if (!azx_has_pm_runtime(chip))
+		pm_runtime_forbid(hda->dev);
+
+	schedule_work(&hda->probe_work);
+
+	return 0;
+
+out_free:
+	snd_card_free(card);
+	return err;
+}
+
+static void hda_tegra_probe_work(struct work_struct *work)
+{
+	struct hda_tegra *hda = container_of(work, struct hda_tegra, probe_work);
+	struct azx *chip = &hda->chip;
+	struct platform_device *pdev = to_platform_device(hda->dev);
+	int err;
+
+	guard(pm_runtime_active)(hda->dev);
+	err = hda_tegra_first_init(chip, pdev);
+	if (err < 0)
+		return;
+
+	/* create codec instances */
+	err = azx_probe_codecs(chip, 8);
+	if (err < 0)
+		return;
+
+	err = azx_codec_configure(chip);
+	if (err < 0)
+		return;
+
+	err = snd_card_register(chip->card);
+	if (err < 0)
+		return;
+
+	chip->running = 1;
+	snd_hda_set_power_save(&chip->bus, power_save * 1000);
+}
+
+static void hda_tegra_remove(struct platform_device *pdev)
+{
+	snd_card_free(dev_get_drvdata(&pdev->dev));
+	pm_runtime_disable(&pdev->dev);
+}
+
+static void hda_tegra_shutdown(struct platform_device *pdev)
+{
+	struct snd_card *card = dev_get_drvdata(&pdev->dev);
+	struct azx *chip;
+
+	if (!card)
+		return;
+	chip = card->private_data;
+	if (chip && chip->running)
+		azx_stop_chip(chip);
+}
+
+static struct platform_driver tegra_platform_hda = {
+	.driver = {
+		.name = "tegra-hda",
+		.pm = pm_ptr(&hda_tegra_pm),
+		.of_match_table = hda_tegra_match,
+	},
+	.probe = hda_tegra_probe,
+	.remove = hda_tegra_remove,
+	.shutdown = hda_tegra_shutdown,
+};
+module_platform_driver(tegra_platform_hda);
+
+MODULE_DESCRIPTION("Tegra HDA bus driver");
+MODULE_LICENSE("GPL v2");