Add Pink Sardine platform ASoC driver

Merge series from Syed Saba Kareem <Syed.SabaKareem@amd.com>:

Pink Sardine platform is new APU series based on acp6.2 design.
This patch set adds an ASoC driver for the ACP (Audio CoProcessor) block
on AMD Pink Sardine APU with DMIC endpoint support.

7 files changed, 1011 insertions, 0 deletions

diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
index 08f5289dac54..68837d42736d 100644
--- a/sound/soc/amd/Kconfig
+++ b/sound/soc/amd/Kconfig
@@ -127,3 +127,24 @@ config SND_SOC_AMD_RPL_ACP6x
           triggered for ACP PCI driver.
           Say m if you have such a device.
           If unsure select "N".
+
+config SND_SOC_AMD_PS
+        tristate "AMD Audio Coprocessor-v6.2 Pink Sardine support"
+        depends on X86 && PCI && ACPI
+        help
+          This option enables Audio Coprocessor i.e ACP v6.2 support on
+          AMD Pink sardine platform. By enabling this flag build will be
+          triggered for ACP PCI driver, ACP PDM DMA driver.
+          Say m if you have such a device.
+          If unsure select "N".
+
+config SND_SOC_AMD_PS_MACH
+        tristate "AMD PINK SARDINE support for DMIC"
+        select SND_SOC_DMIC
+        depends on SND_SOC_AMD_PS
+        help
+          This option enables machine driver for Pink Sardine platform
+          using dmic. ACP IP has PDM Decoder block with DMA controller.
+          DMIC can be connected directly to ACP IP.
+          Say m if you have such a device.
+          If unsure select "N".
diff --git a/sound/soc/amd/Makefile b/sound/soc/amd/Makefile
index 0592e7c5c407..82e1cf864a40 100644
--- a/sound/soc/amd/Makefile
+++ b/sound/soc/amd/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_SND_SOC_AMD_ACP6x) += yc/
 obj-$(CONFIG_SND_SOC_AMD_ACP_COMMON) += acp/
 obj-$(CONFIG_SND_AMD_ACP_CONFIG) += snd-acp-config.o
 obj-$(CONFIG_SND_SOC_AMD_RPL_ACP6x) += rpl/
+obj-$(CONFIG_SND_SOC_AMD_PS) += ps/
diff --git a/sound/soc/amd/ps/Makefile b/sound/soc/amd/ps/Makefile
new file mode 100644
index 000000000000..383973a12f6a
--- /dev/null
+++ b/sound/soc/amd/ps/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Pink Sardine platform Support
+snd-pci-ps-objs := pci-ps.o
+snd-ps-pdm-dma-objs := ps-pdm-dma.o
+snd-soc-ps-mach-objs := ps-mach.o
+
+obj-$(CONFIG_SND_SOC_AMD_PS) += snd-pci-ps.o
+obj-$(CONFIG_SND_SOC_AMD_PS) += snd-ps-pdm-dma.o
+obj-$(CONFIG_SND_SOC_AMD_PS_MACH)   += snd-soc-ps-mach.o
diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
new file mode 100644
index 000000000000..8b30aefa4cd0
--- /dev/null
+++ b/sound/soc/amd/ps/acp62.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * AMD ALSA SoC PDM Driver
+ *
+ * Copyright (C) 2022 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#include <sound/acp62_chip_offset_byte.h>
+
+#define ACP_DEVICE_ID 0x15E2
+#define ACP6x_REG_START		0x1240000
+#define ACP6x_REG_END		0x1250200
+#define ACP6x_DEVS		3
+#define ACP6x_PDM_MODE		1
+
+#define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK	0x00010001
+#define ACP_PGFSM_CNTL_POWER_ON_MASK	1
+#define ACP_PGFSM_CNTL_POWER_OFF_MASK	0
+#define ACP_PGFSM_STATUS_MASK		3
+#define ACP_POWERED_ON			0
+#define ACP_POWER_ON_IN_PROGRESS	1
+#define ACP_POWERED_OFF		2
+#define ACP_POWER_OFF_IN_PROGRESS	3
+
+#define ACP_ERROR_MASK 0x20000000
+#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
+#define PDM_DMA_STAT 0x10
+
+#define PDM_DMA_INTR_MASK	0x10000
+#define ACP_ERROR_STAT	29
+#define PDM_DECIMATION_FACTOR	2
+#define ACP_PDM_CLK_FREQ_MASK	7
+#define ACP_WOV_MISC_CTRL_MASK	0x10
+#define ACP_PDM_ENABLE		1
+#define ACP_PDM_DISABLE		0
+#define ACP_PDM_DMA_EN_STATUS	2
+#define TWO_CH		2
+#define DELAY_US	5
+#define ACP_COUNTER	20000
+
+#define ACP_SRAM_PTE_OFFSET	0x03800000
+#define PAGE_SIZE_4K_ENABLE	2
+#define PDM_PTE_OFFSET		0
+#define PDM_MEM_WINDOW_START	0x4000000
+
+#define CAPTURE_MIN_NUM_PERIODS     4
+#define CAPTURE_MAX_NUM_PERIODS     4
+#define CAPTURE_MAX_PERIOD_SIZE     8192
+#define CAPTURE_MIN_PERIOD_SIZE     4096
+
+#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
+#define MIN_BUFFER MAX_BUFFER
+
+/* time in ms for runtime suspend delay */
+#define ACP_SUSPEND_DELAY_MS	2000
+
+enum acp_config {
+	ACP_CONFIG_0 = 0,
+	ACP_CONFIG_1,
+	ACP_CONFIG_2,
+	ACP_CONFIG_3,
+	ACP_CONFIG_4,
+	ACP_CONFIG_5,
+	ACP_CONFIG_6,
+	ACP_CONFIG_7,
+	ACP_CONFIG_8,
+	ACP_CONFIG_9,
+	ACP_CONFIG_10,
+	ACP_CONFIG_11,
+	ACP_CONFIG_12,
+	ACP_CONFIG_13,
+	ACP_CONFIG_14,
+	ACP_CONFIG_15,
+};
+
+struct pdm_stream_instance {
+	u16 num_pages;
+	u16 channels;
+	dma_addr_t dma_addr;
+	u64 bytescount;
+	void __iomem *acp62_base;
+};
+
+struct pdm_dev_data {
+	u32 pdm_irq;
+	void __iomem *acp62_base;
+	struct snd_pcm_substream *capture_stream;
+};
+
+static inline u32 acp62_readl(void __iomem *base_addr)
+{
+	return readl(base_addr);
+}
+
+static inline void acp62_writel(u32 val, void __iomem *base_addr)
+{
+	writel(val, base_addr);
+}
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
new file mode 100644
index 000000000000..dff2e2376bbf
--- /dev/null
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -0,0 +1,351 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD Pink Sardine ACP PCI Driver
+ *
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+
+#include "acp62.h"
+
+struct acp62_dev_data {
+	void __iomem *acp62_base;
+	struct resource *res;
+	bool acp62_audio_mode;
+	struct platform_device *pdev[ACP6x_DEVS];
+};
+
+static int acp62_power_on(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	val = acp62_readl(acp_base + ACP_PGFSM_STATUS);
+
+	if (!val)
+		return val;
+
+	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+		acp62_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_PGFSM_STATUS);
+		if (!val)
+			return 0;
+		udelay(1);
+	}
+	return -ETIMEDOUT;
+}
+
+static int acp62_reset(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	acp62_writel(1, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_SOFT_RESET);
+		if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+			break;
+		cpu_relax();
+	}
+	acp62_writel(0, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_SOFT_RESET);
+		if (!val)
+			return 0;
+		cpu_relax();
+	}
+	return -ETIMEDOUT;
+}
+
+static void acp62_enable_interrupts(void __iomem *acp_base)
+{
+	acp62_writel(1, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static void acp62_disable_interrupts(void __iomem *acp_base)
+{
+	acp62_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
+		     ACP_EXTERNAL_INTR_STAT);
+	acp62_writel(0, acp_base + ACP_EXTERNAL_INTR_CNTL);
+	acp62_writel(0, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp62_init(void __iomem *acp_base, struct device *dev)
+{
+	int ret;
+
+	ret = acp62_power_on(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP power on failed\n");
+		return ret;
+	}
+	acp62_writel(0x01, acp_base + ACP_CONTROL);
+	ret = acp62_reset(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP reset failed\n");
+		return ret;
+	}
+	acp62_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+	acp62_enable_interrupts(acp_base);
+	return 0;
+}
+
+static int acp62_deinit(void __iomem *acp_base, struct device *dev)
+{
+	int ret;
+
+	acp62_disable_interrupts(acp_base);
+	ret = acp62_reset(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP reset failed\n");
+		return ret;
+	}
+	acp62_writel(0, acp_base + ACP_CLKMUX_SEL);
+	acp62_writel(0, acp_base + ACP_CONTROL);
+	return 0;
+}
+
+static irqreturn_t acp62_irq_handler(int irq, void *dev_id)
+{
+	struct acp62_dev_data *adata;
+	struct pdm_dev_data *ps_pdm_data;
+	u32 val;
+
+	adata = dev_id;
+	if (!adata)
+		return IRQ_NONE;
+
+	val = acp62_readl(adata->acp62_base + ACP_EXTERNAL_INTR_STAT);
+	if (val & BIT(PDM_DMA_STAT)) {
+		ps_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev);
+		acp62_writel(BIT(PDM_DMA_STAT), adata->acp62_base + ACP_EXTERNAL_INTR_STAT);
+		if (ps_pdm_data->capture_stream)
+			snd_pcm_period_elapsed(ps_pdm_data->capture_stream);
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+static int snd_acp62_probe(struct pci_dev *pci,
+			   const struct pci_device_id *pci_id)
+{
+	struct acp62_dev_data *adata;
+	struct platform_device_info pdevinfo[ACP6x_DEVS];
+	int index, ret;
+	int val = 0x00;
+	struct acpi_device *adev;
+	const union acpi_object *obj;
+	u32 addr;
+	unsigned int irqflags;
+
+	irqflags = IRQF_SHARED;
+	/* Pink Sardine device check */
+	switch (pci->revision) {
+	case 0x63:
+		break;
+	default:
+		dev_dbg(&pci->dev, "acp62 pci device not found\n");
+		return -ENODEV;
+	}
+	if (pci_enable_device(pci)) {
+		dev_err(&pci->dev, "pci_enable_device failed\n");
+		return -ENODEV;
+	}
+
+	ret = pci_request_regions(pci, "AMD ACP6.2 audio");
+	if (ret < 0) {
+		dev_err(&pci->dev, "pci_request_regions failed\n");
+		goto disable_pci;
+	}
+	adata = devm_kzalloc(&pci->dev, sizeof(struct acp62_dev_data),
+			     GFP_KERNEL);
+	if (!adata) {
+		ret = -ENOMEM;
+		goto release_regions;
+	}
+
+	addr = pci_resource_start(pci, 0);
+	adata->acp62_base = devm_ioremap(&pci->dev, addr,
+					 pci_resource_len(pci, 0));
+	if (!adata->acp62_base) {
+		ret = -ENOMEM;
+		goto release_regions;
+	}
+	pci_set_master(pci);
+	pci_set_drvdata(pci, adata);
+	ret = acp62_init(adata->acp62_base, &pci->dev);
+	if (ret)
+		goto release_regions;
+	val = acp62_readl(adata->acp62_base + ACP_PIN_CONFIG);
+	switch (val) {
+	case ACP_CONFIG_0:
+	case ACP_CONFIG_1:
+	case ACP_CONFIG_2:
+	case ACP_CONFIG_3:
+	case ACP_CONFIG_9:
+	case ACP_CONFIG_15:
+		dev_info(&pci->dev, "Audio Mode %d\n", val);
+		break;
+	default:
+
+		/* Checking DMIC hardware*/
+		adev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), 0x02, 0);
+
+		if (!adev)
+			break;
+
+		if (!acpi_dev_get_property(adev, "acp-audio-device-type",
+					   ACPI_TYPE_INTEGER, &obj) &&
+					   obj->integer.value == 2) {
+			adata->res = devm_kzalloc(&pci->dev, sizeof(struct resource), GFP_KERNEL);
+			if (!adata->res) {
+				ret = -ENOMEM;
+				goto de_init;
+			}
+
+			adata->res->name = "acp_iomem";
+			adata->res->flags = IORESOURCE_MEM;
+			adata->res->start = addr;
+			adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);
+			adata->acp62_audio_mode = ACP6x_PDM_MODE;
+
+			memset(&pdevinfo, 0, sizeof(pdevinfo));
+			pdevinfo[0].name = "acp_ps_pdm_dma";
+			pdevinfo[0].id = 0;
+			pdevinfo[0].parent = &pci->dev;
+			pdevinfo[0].num_res = 1;
+			pdevinfo[0].res = adata->res;
+
+			pdevinfo[1].name = "dmic-codec";
+			pdevinfo[1].id = 0;
+			pdevinfo[1].parent = &pci->dev;
+
+			pdevinfo[2].name = "acp_ps_mach";
+			pdevinfo[2].id = 0;
+			pdevinfo[2].parent = &pci->dev;
+
+			for (index = 0; index < ACP6x_DEVS; index++) {
+				adata->pdev[index] =
+					platform_device_register_full(&pdevinfo[index]);
+
+				if (IS_ERR(adata->pdev[index])) {
+					dev_err(&pci->dev,
+						"cannot register %s device\n",
+						 pdevinfo[index].name);
+					ret = PTR_ERR(adata->pdev[index]);
+					goto unregister_devs;
+				}
+				ret = devm_request_irq(&pci->dev, pci->irq, acp62_irq_handler,
+						       irqflags, "ACP_PCI_IRQ", adata);
+				if (ret) {
+					dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
+					goto unregister_devs;
+				}
+			}
+		}
+		break;
+	}
+	pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pci->dev);
+	pm_runtime_put_noidle(&pci->dev);
+	pm_runtime_allow(&pci->dev);
+	return 0;
+unregister_devs:
+	for (--index; index >= 0; index--)
+		platform_device_unregister(adata->pdev[index]);
+de_init:
+	if (acp62_deinit(adata->acp62_base, &pci->dev))
+		dev_err(&pci->dev, "ACP de-init failed\n");
+release_regions:
+	pci_release_regions(pci);
+disable_pci:
+	pci_disable_device(pci);
+
+	return ret;
+}
+
+static int __maybe_unused snd_acp62_suspend(struct device *dev)
+{
+	struct acp62_dev_data *adata;
+	int ret;
+
+	adata = dev_get_drvdata(dev);
+	ret = acp62_deinit(adata->acp62_base, dev);
+	if (ret)
+		dev_err(dev, "ACP de-init failed\n");
+	return ret;
+}
+
+static int __maybe_unused snd_acp62_resume(struct device *dev)
+{
+	struct acp62_dev_data *adata;
+	int ret;
+
+	adata = dev_get_drvdata(dev);
+	ret = acp62_init(adata->acp62_base, dev);
+	if (ret)
+		dev_err(dev, "ACP init failed\n");
+	return ret;
+}
+
+static const struct dev_pm_ops acp62_pm_ops = {
+	SET_RUNTIME_PM_OPS(snd_acp62_suspend, snd_acp62_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(snd_acp62_suspend, snd_acp62_resume)
+};
+
+static void snd_acp62_remove(struct pci_dev *pci)
+{
+	struct acp62_dev_data *adata;
+	int ret, index;
+
+	adata = pci_get_drvdata(pci);
+	if (adata->acp62_audio_mode == ACP6x_PDM_MODE) {
+		for (index = 0; index < ACP6x_DEVS; index++)
+			platform_device_unregister(adata->pdev[index]);
+	}
+	ret = acp62_deinit(adata->acp62_base, &pci->dev);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
+	pm_runtime_forbid(&pci->dev);
+	pm_runtime_get_noresume(&pci->dev);
+	pci_release_regions(pci);
+	pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_acp62_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
+	.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
+	.class_mask = 0xffffff },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, snd_acp62_ids);
+
+static struct pci_driver ps_acp62_driver  = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_acp62_ids,
+	.probe = snd_acp62_probe,
+	.remove = snd_acp62_remove,
+	.driver = {
+		.pm = &acp62_pm_ops,
+	}
+};
+
+module_pci_driver(ps_acp62_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_AUTHOR("Syed.SabaKareem@amd.com");
+MODULE_DESCRIPTION("AMD ACP Pink Sardine PCI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/amd/ps/ps-mach.c b/sound/soc/amd/ps/ps-mach.c
new file mode 100644
index 000000000000..b3e97093481d
--- /dev/null
+++ b/sound/soc/amd/ps/ps-mach.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Machine driver for AMD Pink Sardine platform using DMIC
+ *
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ */
+
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <linux/io.h>
+#include <linux/dmi.h>
+
+#include "acp62.h"
+
+#define DRV_NAME "acp_ps_mach"
+
+SND_SOC_DAILINK_DEF(acp62_pdm,
+		    DAILINK_COMP_ARRAY(COMP_CPU("acp_ps_pdm_dma.0")));
+
+SND_SOC_DAILINK_DEF(dmic_codec,
+		    DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec.0",
+						  "dmic-hifi")));
+
+SND_SOC_DAILINK_DEF(pdm_platform,
+		    DAILINK_COMP_ARRAY(COMP_PLATFORM("acp_ps_pdm_dma.0")));
+
+static struct snd_soc_dai_link acp62_dai_pdm[] = {
+	{
+		.name = "acp62-dmic-capture",
+		.stream_name = "DMIC capture",
+		.capture_only = 1,
+		SND_SOC_DAILINK_REG(acp62_pdm, dmic_codec, pdm_platform),
+	},
+};
+
+static struct snd_soc_card acp62_card = {
+	.name = "acp62",
+	.owner = THIS_MODULE,
+	.dai_link = acp62_dai_pdm,
+	.num_links = 1,
+};
+
+static int acp62_probe(struct platform_device *pdev)
+{
+	struct acp62_pdm *machine = NULL;
+	struct snd_soc_card *card;
+	int ret;
+
+	platform_set_drvdata(pdev, &acp62_card);
+	card = platform_get_drvdata(pdev);
+	acp62_card.dev = &pdev->dev;
+
+	snd_soc_card_set_drvdata(card, machine);
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret) {
+		return dev_err_probe(&pdev->dev, ret,
+				"snd_soc_register_card(%s) failed\n",
+				card->name);
+	}
+
+	return 0;
+}
+
+static struct platform_driver acp62_mach_driver = {
+	.driver = {
+		.name = "acp_ps_mach",
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = acp62_probe,
+};
+
+module_platform_driver(acp62_mach_driver);
+
+MODULE_AUTHOR("Syed.SabaKareem@amd.com");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/ps/ps-pdm-dma.c b/sound/soc/amd/ps/ps-pdm-dma.c
new file mode 100644
index 000000000000..b207b726cd82
--- /dev/null
+++ b/sound/soc/amd/ps/ps-pdm-dma.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD ALSA SoC Pink Sardine PDM Driver
+ *
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <linux/pm_runtime.h>
+
+#include "acp62.h"
+
+#define DRV_NAME "acp_ps_pdm_dma"
+
+static const struct snd_pcm_hardware acp62_pdm_hardware_capture = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+	.formats = SNDRV_PCM_FMTBIT_S32_LE,
+	.channels_min = 2,
+	.channels_max = 2,
+	.rates = SNDRV_PCM_RATE_48000,
+	.rate_min = 48000,
+	.rate_max = 48000,
+	.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+	.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+	.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
+	.periods_min = CAPTURE_MIN_NUM_PERIODS,
+	.periods_max = CAPTURE_MAX_NUM_PERIODS,
+};
+
+static void acp62_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size,
+				       u32 watermark_size, void __iomem *acp_base)
+{
+	acp62_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR);
+	acp62_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE);
+	acp62_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
+	acp62_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
+}
+
+static void acp62_enable_pdm_clock(void __iomem *acp_base)
+{
+	u32 pdm_clk_enable, pdm_ctrl;
+
+	pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK;
+	pdm_ctrl = 0x00;
+
+	acp62_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
+	pdm_ctrl = acp62_readl(acp_base + ACP_WOV_MISC_CTRL);
+	pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
+	acp62_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
+}
+
+static void acp62_enable_pdm_interrupts(void __iomem *acp_base)
+{
+	u32 ext_int_ctrl;
+
+	ext_int_ctrl = acp62_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl |= PDM_DMA_INTR_MASK;
+	acp62_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static void acp62_disable_pdm_interrupts(void __iomem *acp_base)
+{
+	u32 ext_int_ctrl;
+
+	ext_int_ctrl = acp62_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
+	acp62_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static bool acp62_check_pdm_dma_status(void __iomem *acp_base)
+{
+	bool pdm_dma_status;
+	u32 pdm_enable, pdm_dma_enable;
+
+	pdm_dma_status = false;
+	pdm_enable = acp62_readl(acp_base + ACP_WOV_PDM_ENABLE);
+	pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+	if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS))
+		pdm_dma_status = true;
+
+	return pdm_dma_status;
+}
+
+static int acp62_start_pdm_dma(void __iomem *acp_base)
+{
+	u32 pdm_enable;
+	u32 pdm_dma_enable;
+	int timeout;
+
+	pdm_enable = 0x01;
+	pdm_dma_enable  = 0x01;
+
+	acp62_enable_pdm_clock(acp_base);
+	acp62_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+	acp62_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+	timeout = 0;
+	while (++timeout < ACP_COUNTER) {
+		pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS)
+			return 0;
+		udelay(DELAY_US);
+	}
+	return -ETIMEDOUT;
+}
+
+static int acp62_stop_pdm_dma(void __iomem *acp_base)
+{
+	u32 pdm_enable, pdm_dma_enable;
+	int timeout;
+
+	pdm_enable = 0x00;
+	pdm_dma_enable  = 0x00;
+
+	pdm_enable = acp62_readl(acp_base + ACP_WOV_PDM_ENABLE);
+	pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+	if (pdm_dma_enable & 0x01) {
+		pdm_dma_enable = 0x02;
+		acp62_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		timeout = 0;
+		while (++timeout < ACP_COUNTER) {
+			pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+			if ((pdm_dma_enable & 0x02) == 0x00)
+				break;
+			udelay(DELAY_US);
+		}
+		if (timeout == ACP_COUNTER)
+			return -ETIMEDOUT;
+	}
+	if (pdm_enable == ACP_PDM_ENABLE) {
+		pdm_enable = ACP_PDM_DISABLE;
+		acp62_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+	}
+	acp62_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH);
+	return 0;
+}
+
+static void acp62_config_dma(struct pdm_stream_instance *rtd, int direction)
+{
+	u16 page_idx;
+	u32 low, high, val;
+	dma_addr_t addr;
+
+	addr = rtd->dma_addr;
+	val = PDM_PTE_OFFSET;
+
+	/* Group Enable */
+	acp62_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp62_base +
+		     ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
+	acp62_writel(PAGE_SIZE_4K_ENABLE, rtd->acp62_base +
+		     ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
+	for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
+		/* Load the low address of page int ACP SRAM through SRBM */
+		low = lower_32_bits(addr);
+		high = upper_32_bits(addr);
+
+		acp62_writel(low, rtd->acp62_base + ACP_SCRATCH_REG_0 + val);
+		high |= BIT(31);
+		acp62_writel(high, rtd->acp62_base + ACP_SCRATCH_REG_0 + val + 4);
+		val += 8;
+		addr += PAGE_SIZE;
+	}
+}
+
+static int acp62_pdm_dma_open(struct snd_soc_component *component,
+			      struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime;
+	struct pdm_dev_data *adata;
+	struct pdm_stream_instance *pdm_data;
+	int ret;
+
+	runtime = substream->runtime;
+	adata = dev_get_drvdata(component->dev);
+	pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL);
+	if (!pdm_data)
+		return -EINVAL;
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		runtime->hw = acp62_pdm_hardware_capture;
+
+	ret = snd_pcm_hw_constraint_integer(runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		dev_err(component->dev, "set integer constraint failed\n");
+		kfree(pdm_data);
+		return ret;
+	}
+
+	acp62_enable_pdm_interrupts(adata->acp62_base);
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		adata->capture_stream = substream;
+
+	pdm_data->acp62_base = adata->acp62_base;
+	runtime->private_data = pdm_data;
+	return ret;
+}
+
+static int acp62_pdm_dma_hw_params(struct snd_soc_component *component,
+				   struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *params)
+{
+	struct pdm_stream_instance *rtd;
+	size_t size, period_bytes;
+
+	rtd = substream->runtime->private_data;
+	if (!rtd)
+		return -EINVAL;
+	size = params_buffer_bytes(params);
+	period_bytes = params_period_bytes(params);
+	rtd->dma_addr = substream->runtime->dma_addr;
+	rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
+	acp62_config_dma(rtd, substream->stream);
+	acp62_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size,
+				   period_bytes, rtd->acp62_base);
+	return 0;
+}
+
+static u64 acp62_pdm_get_byte_count(struct pdm_stream_instance *rtd,
+				    int direction)
+{
+	u32 high, low;
+	u64 byte_count;
+
+	high = acp62_readl(rtd->acp62_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
+	byte_count = high;
+	low = acp62_readl(rtd->acp62_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
+	byte_count = (byte_count << 32) | low;
+	return byte_count;
+}
+
+static snd_pcm_uframes_t acp62_pdm_dma_pointer(struct snd_soc_component *comp,
+					       struct snd_pcm_substream *stream)
+{
+	struct pdm_stream_instance *rtd;
+	u32 pos, buffersize;
+	u64 bytescount;
+
+	rtd = stream->runtime->private_data;
+	buffersize = frames_to_bytes(stream->runtime,
+				     stream->runtime->buffer_size);
+	bytescount = acp62_pdm_get_byte_count(rtd, stream->stream);
+	if (bytescount > rtd->bytescount)
+		bytescount -= rtd->bytescount;
+	pos = do_div(bytescount, buffersize);
+	return bytes_to_frames(stream->runtime, pos);
+}
+
+static int acp62_pdm_dma_new(struct snd_soc_component *component,
+			     struct snd_soc_pcm_runtime *rtd)
+{
+	struct device *parent = component->dev->parent;
+
+	snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
+				       parent, MIN_BUFFER, MAX_BUFFER);
+	return 0;
+}
+
+static int acp62_pdm_dma_close(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream)
+{
+	struct pdm_dev_data *adata = dev_get_drvdata(component->dev);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	acp62_disable_pdm_interrupts(adata->acp62_base);
+	adata->capture_stream = NULL;
+	kfree(runtime->private_data);
+	return 0;
+}
+
+static int acp62_pdm_dai_trigger(struct snd_pcm_substream *substream,
+				 int cmd, struct snd_soc_dai *dai)
+{
+	struct pdm_stream_instance *rtd;
+	int ret;
+	bool pdm_status;
+	unsigned int ch_mask;
+
+	rtd = substream->runtime->private_data;
+	ret = 0;
+	switch (substream->runtime->channels) {
+	case TWO_CH:
+		ch_mask = 0x00;
+		break;
+	default:
+		return -EINVAL;
+	}
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		acp62_writel(ch_mask, rtd->acp62_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+		acp62_writel(PDM_DECIMATION_FACTOR, rtd->acp62_base +
+			     ACP_WOV_PDM_DECIMATION_FACTOR);
+		rtd->bytescount = acp62_pdm_get_byte_count(rtd, substream->stream);
+		pdm_status = acp62_check_pdm_dma_status(rtd->acp62_base);
+		if (!pdm_status)
+			ret = acp62_start_pdm_dma(rtd->acp62_base);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		pdm_status = acp62_check_pdm_dma_status(rtd->acp62_base);
+		if (pdm_status)
+			ret = acp62_stop_pdm_dma(rtd->acp62_base);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static const struct snd_soc_dai_ops acp62_pdm_dai_ops = {
+	.trigger   = acp62_pdm_dai_trigger,
+};
+
+static struct snd_soc_dai_driver acp62_pdm_dai_driver = {
+	.name = "acp_ps_pdm_dma.0",
+	.capture = {
+		.rates = SNDRV_PCM_RATE_48000,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 2,
+		.rate_min = 48000,
+		.rate_max = 48000,
+	},
+	.ops = &acp62_pdm_dai_ops,
+};
+
+static const struct snd_soc_component_driver acp62_pdm_component = {
+	.name		= DRV_NAME,
+	.open		= acp62_pdm_dma_open,
+	.close		= acp62_pdm_dma_close,
+	.hw_params	= acp62_pdm_dma_hw_params,
+	.pointer	= acp62_pdm_dma_pointer,
+	.pcm_construct	= acp62_pdm_dma_new,
+};
+
+static int acp62_pdm_audio_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct pdm_dev_data *adata;
+	int status;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+		return -ENODEV;
+	}
+
+	adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
+	if (!adata)
+		return -ENOMEM;
+
+	adata->acp62_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!adata->acp62_base)
+		return -ENOMEM;
+
+	adata->capture_stream = NULL;
+
+	dev_set_drvdata(&pdev->dev, adata);
+	status = devm_snd_soc_register_component(&pdev->dev,
+						 &acp62_pdm_component,
+						 &acp62_pdm_dai_driver, 1);
+	if (status) {
+		dev_err(&pdev->dev, "Fail to register acp pdm dai\n");
+
+		return -ENODEV;
+	}
+	pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_allow(&pdev->dev);
+	return 0;
+}
+
+static int acp62_pdm_audio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int __maybe_unused acp62_pdm_resume(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+	struct snd_pcm_runtime *runtime;
+	struct pdm_stream_instance *rtd;
+	u32 period_bytes, buffer_len;
+
+	adata = dev_get_drvdata(dev);
+	if (adata->capture_stream && adata->capture_stream->runtime) {
+		runtime = adata->capture_stream->runtime;
+		rtd = runtime->private_data;
+		period_bytes = frames_to_bytes(runtime, runtime->period_size);
+		buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
+		acp62_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+		acp62_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
+					   period_bytes, adata->acp62_base);
+	}
+	acp62_enable_pdm_interrupts(adata->acp62_base);
+	return 0;
+}
+
+static int __maybe_unused acp62_pdm_suspend(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp62_disable_pdm_interrupts(adata->acp62_base);
+	return 0;
+}
+
+static int __maybe_unused acp62_pdm_runtime_resume(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp62_enable_pdm_interrupts(adata->acp62_base);
+	return 0;
+}
+
+static const struct dev_pm_ops acp62_pdm_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp62_pdm_suspend, acp62_pdm_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(acp62_pdm_suspend, acp62_pdm_resume)
+};
+
+static struct platform_driver acp62_pdm_dma_driver = {
+	.probe = acp62_pdm_audio_probe,
+	.remove = acp62_pdm_audio_remove,
+	.driver = {
+		.name = "acp_ps_pdm_dma",
+		.pm = &acp62_pdm_pm_ops,
+	},
+};
+
+module_platform_driver(acp62_pdm_dma_driver);
+
+MODULE_AUTHOR("Syed.SabaKareem@amd.com");
+MODULE_DESCRIPTION("AMD PINK SARDINE PDM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);