Merge series "Add Yellow Carp platform ASoC driver" from Vijendar Mukunda <Vijendar.Mukunda@amd.com>:

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

changes since v1:
  - fixed SPDX commenting style in acp6x pci driver.
  - fixed Copyright commenting style in acp6x pci driver,
    pdm dma driver and machine driver files.
  - fixed local variable check logic in acp6x_power_on() function.
  - fixed Kconfig indentation issue
  - removed irq_flag local variable in irq handler.
  - add dmi info check in machine driver probe

Vijendar Mukunda (13):
  ASoC: amd: add Yellow Carp ACP6x IP register header
  ASoC: amd: add Yellow Carp ACP PCI driver
  ASoC: amd: add acp6x init/de-init functions
  ASoC: amd: add platform devices for acp6x pdm driver and dmic driver
  ASoC: amd: add acp6x pdm platform driver
  ASoC: amd: add acp6x irq handler
  ASoC: amd: add acp6x pdm driver dma ops
  ASoC: amd: add acp6x pci driver pm ops
  ASoC: amd: add acp6x pdm driver pm ops
  ASoC: amd: enable Yellow carp acp6x drivers build
  ASoC: amd: create platform device for acp6x machine driver
  ASoC: amd: add YC machine driver using dmic
  ASoC: amd: enable Yellow Carp platform machine driver build

 sound/soc/amd/Kconfig                     |  21 +
 sound/soc/amd/Makefile                    |   1 +
 sound/soc/amd/yc/Makefile                 |   9 +
 sound/soc/amd/yc/acp6x-mach.c             | 194 ++++++++++
 sound/soc/amd/yc/acp6x-pdm-dma.c          | 448 ++++++++++++++++++++++
 sound/soc/amd/yc/acp6x.h                  | 107 ++++++
 sound/soc/amd/yc/acp6x_chip_offset_byte.h | 444 +++++++++++++++++++++
 sound/soc/amd/yc/pci-acp6x.c              | 338 ++++++++++++++++
 8 files changed, 1562 insertions(+)
 create mode 100644 sound/soc/amd/yc/Makefile
 create mode 100644 sound/soc/amd/yc/acp6x-mach.c
 create mode 100644 sound/soc/amd/yc/acp6x-pdm-dma.c
 create mode 100644 sound/soc/amd/yc/acp6x.h
 create mode 100644 sound/soc/amd/yc/acp6x_chip_offset_byte.h
 create mode 100644 sound/soc/amd/yc/pci-acp6x.c

--
2.25.1

8 files changed, 1562 insertions, 0 deletions

diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
index d91a9399777c..a01ade38554e 100644
--- a/sound/soc/amd/Kconfig
+++ b/sound/soc/amd/Kconfig
@@ -74,3 +74,24 @@ config SND_SOC_AMD_VANGOGH_MACH
 	  using NAU8821 and CS35L41 codecs.
 	  Say m if you have such a device.
 	  If unsure select "N".
+
+config SND_SOC_AMD_ACP6x
+	tristate "AMD Audio Coprocessor-v6.x Yellow Carp support"
+	depends on X86 && PCI
+	help
+	  This option enables Audio Coprocessor i.e ACP v6.x support on
+	  AMD Yellow Carp 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_YC_MACH
+	tristate "AMD YC support for DMIC"
+	select SND_SOC_DMIC
+	depends on SND_SOC_AMD_ACP6x
+	help
+	  This option enables machine driver for Yellow Carp 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 07150d26f315..c5b900d3df0b 100644
--- a/sound/soc/amd/Makefile
+++ b/sound/soc/amd/Makefile
@@ -11,3 +11,4 @@ obj-$(CONFIG_SND_SOC_AMD_ACP3x) += raven/
 obj-$(CONFIG_SND_SOC_AMD_RV_RT5682_MACH) += snd-soc-acp-rt5682-mach.o
 obj-$(CONFIG_SND_SOC_AMD_RENOIR) += renoir/
 obj-$(CONFIG_SND_SOC_AMD_ACP5x) += vangogh/
+obj-$(CONFIG_SND_SOC_AMD_ACP6x) += yc/
diff --git a/sound/soc/amd/yc/Makefile b/sound/soc/amd/yc/Makefile
new file mode 100644
index 000000000000..dc2974440388
--- /dev/null
+++ b/sound/soc/amd/yc/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Yellow Carp platform Support
+snd-pci-acp6x-objs	:= pci-acp6x.o
+snd-acp6x-pdm-dma-objs	:= acp6x-pdm-dma.o
+snd-soc-acp6x-mach-objs := acp6x-mach.o
+
+obj-$(CONFIG_SND_SOC_AMD_ACP6x) += snd-pci-acp6x.o
+obj-$(CONFIG_SND_SOC_AMD_ACP6x) += snd-acp6x-pdm-dma.o
+obj-$(CONFIG_SND_SOC_AMD_YC_MACH)   += snd-soc-acp6x-mach.o
diff --git a/sound/soc/amd/yc/acp6x-mach.c b/sound/soc/amd/yc/acp6x-mach.c
new file mode 100644
index 000000000000..9a767f47b89f
--- /dev/null
+++ b/sound/soc/amd/yc/acp6x-mach.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Machine driver for AMD Yellow Carp platform using DMIC
+ *
+ * Copyright 2021 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 "acp6x.h"
+
+#define DRV_NAME "acp_yc_mach"
+
+SND_SOC_DAILINK_DEF(acp6x_pdm,
+		    DAILINK_COMP_ARRAY(COMP_CPU("acp_yc_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_yc_pdm_dma.0")));
+
+static struct snd_soc_dai_link acp6x_dai_pdm[] = {
+	{
+		.name = "acp6x-dmic-capture",
+		.stream_name = "DMIC capture",
+		.capture_only = 1,
+		SND_SOC_DAILINK_REG(acp6x_pdm, dmic_codec, pdm_platform),
+	},
+};
+
+static struct snd_soc_card acp6x_card = {
+	.name = "acp6x",
+	.owner = THIS_MODULE,
+	.dai_link = acp6x_dai_pdm,
+	.num_links = 1,
+};
+
+static const struct dmi_system_id yc_acp_quirk_table[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D2"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D3"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D4"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D5"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CF"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CG"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CQ"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CR"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21AW"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21AX"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21BN"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21BQ"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CH"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CJ"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CK"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21CL"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D8"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "21D9"),
+		}
+	},
+	{}
+};
+
+static int acp6x_probe(struct platform_device *pdev)
+{
+	struct acp6x_pdm *machine = NULL;
+	struct snd_soc_card *card;
+	int ret;
+	const struct dmi_system_id *dmi_id;
+
+	dmi_id = dmi_first_match(yc_acp_quirk_table);
+	if (!dmi_id)
+		return -ENODEV;
+	card = &acp6x_card;
+	acp6x_card.dev = &pdev->dev;
+
+	platform_set_drvdata(pdev, card);
+	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 acp6x_mach_driver = {
+	.driver = {
+		.name = "acp_yc_mach",
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = acp6x_probe,
+};
+
+module_platform_driver(acp6x_mach_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/yc/acp6x-pdm-dma.c b/sound/soc/amd/yc/acp6x-pdm-dma.c
new file mode 100644
index 000000000000..e604f4ea524f
--- /dev/null
+++ b/sound/soc/amd/yc/acp6x-pdm-dma.c
@@ -0,0 +1,448 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD ALSA SoC Yellow Carp PDM Driver
+ *
+ * Copyright 2021 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 "acp6x.h"
+
+#define DRV_NAME "acp_yc_pdm_dma"
+
+static const struct snd_pcm_hardware acp6x_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 acp6x_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size,
+				       u32 watermark_size, void __iomem *acp_base)
+{
+	acp6x_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR);
+	acp6x_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE);
+	acp6x_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
+	acp6x_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
+}
+
+static void acp6x_enable_pdm_clock(void __iomem *acp_base)
+{
+	u32 pdm_clk_enable, pdm_ctrl;
+
+	pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK;
+	pdm_ctrl = 0x00;
+
+	acp6x_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
+	pdm_ctrl = acp6x_readl(acp_base + ACP_WOV_MISC_CTRL);
+	pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
+	acp6x_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
+}
+
+static void acp6x_enable_pdm_interrupts(void __iomem *acp_base)
+{
+	u32 ext_int_ctrl;
+
+	ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl |= PDM_DMA_INTR_MASK;
+	acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static void acp6x_disable_pdm_interrupts(void __iomem *acp_base)
+{
+	u32 ext_int_ctrl;
+
+	ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+	ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
+	acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static bool acp6x_check_pdm_dma_status(void __iomem *acp_base)
+{
+	bool pdm_dma_status;
+	u32 pdm_enable, pdm_dma_enable;
+
+	pdm_dma_status = false;
+	pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE);
+	pdm_dma_enable = acp6x_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 acp6x_start_pdm_dma(void __iomem *acp_base)
+{
+	u32 pdm_enable;
+	u32 pdm_dma_enable;
+	int timeout;
+
+	pdm_enable = 0x01;
+	pdm_dma_enable  = 0x01;
+
+	acp6x_enable_pdm_clock(acp_base);
+	acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+	acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+	timeout = 0;
+	while (++timeout < ACP_COUNTER) {
+		pdm_dma_enable = acp6x_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 acp6x_stop_pdm_dma(void __iomem *acp_base)
+{
+	u32 pdm_enable, pdm_dma_enable;
+	int timeout;
+
+	pdm_enable = 0x00;
+	pdm_dma_enable  = 0x00;
+
+	pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE);
+	pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+	if (pdm_dma_enable & 0x01) {
+		pdm_dma_enable = 0x02;
+		acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+		timeout = 0;
+		while (++timeout < ACP_COUNTER) {
+			pdm_dma_enable = acp6x_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;
+		acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+	}
+	acp6x_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH);
+	return 0;
+}
+
+static void acp6x_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 */
+	acp6x_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp6x_base +
+		     ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
+	acp6x_writel(PAGE_SIZE_4K_ENABLE, rtd->acp6x_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);
+
+		acp6x_writel(low, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val);
+		high |= BIT(31);
+		acp6x_writel(high, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val + 4);
+		val += 8;
+		addr += PAGE_SIZE;
+	}
+}
+
+static int acp6x_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 = acp6x_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;
+	}
+
+	acp6x_enable_pdm_interrupts(adata->acp6x_base);
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		adata->capture_stream = substream;
+
+	pdm_data->acp6x_base = adata->acp6x_base;
+	runtime->private_data = pdm_data;
+	return ret;
+}
+
+static int acp6x_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);
+	acp6x_config_dma(rtd, substream->stream);
+	acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size,
+				   period_bytes, rtd->acp6x_base);
+	return 0;
+}
+
+static u64 acp6x_pdm_get_byte_count(struct pdm_stream_instance *rtd,
+				    int direction)
+{
+	union acp_pdm_dma_count byte_count;
+
+	byte_count.bcount.high =
+			acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
+	byte_count.bcount.low =
+			acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
+	return byte_count.bytescount;
+}
+
+static snd_pcm_uframes_t acp6x_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 = acp6x_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 acp6x_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 acp6x_pdm_dma_close(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream)
+{
+	struct pdm_dev_data *adata = dev_get_drvdata(component->dev);
+
+	acp6x_disable_pdm_interrupts(adata->acp6x_base);
+	adata->capture_stream = NULL;
+	return 0;
+}
+
+static int acp6x_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:
+		acp6x_writel(ch_mask, rtd->acp6x_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+		acp6x_writel(PDM_DECIMATION_FACTOR, rtd->acp6x_base +
+			     ACP_WOV_PDM_DECIMATION_FACTOR);
+		rtd->bytescount = acp6x_pdm_get_byte_count(rtd, substream->stream);
+		pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base);
+		if (!pdm_status)
+			ret = acp6x_start_pdm_dma(rtd->acp6x_base);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base);
+		if (pdm_status)
+			ret = acp6x_stop_pdm_dma(rtd->acp6x_base);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static struct snd_soc_dai_ops acp6x_pdm_dai_ops = {
+	.trigger   = acp6x_pdm_dai_trigger,
+};
+
+static struct snd_soc_dai_driver acp6x_pdm_dai_driver = {
+	.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 = &acp6x_pdm_dai_ops,
+};
+
+static const struct snd_soc_component_driver acp6x_pdm_component = {
+	.name		= DRV_NAME,
+	.open		= acp6x_pdm_dma_open,
+	.close		= acp6x_pdm_dma_close,
+	.hw_params	= acp6x_pdm_dma_hw_params,
+	.pointer	= acp6x_pdm_dma_pointer,
+	.pcm_construct	= acp6x_pdm_dma_new,
+};
+
+static int acp6x_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->acp6x_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!adata->acp6x_base)
+		return -ENOMEM;
+
+	adata->capture_stream = NULL;
+
+	dev_set_drvdata(&pdev->dev, adata);
+	status = devm_snd_soc_register_component(&pdev->dev,
+						 &acp6x_pdm_component,
+						 &acp6x_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 acp6x_pdm_audio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int __maybe_unused acp6x_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);
+		acp6x_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+		acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
+					   period_bytes, adata->acp6x_base);
+	}
+	acp6x_enable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static int __maybe_unused acp6x_pdm_suspend(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp6x_disable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static int __maybe_unused acp6x_pdm_runtime_resume(struct device *dev)
+{
+	struct pdm_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	acp6x_enable_pdm_interrupts(adata->acp6x_base);
+	return 0;
+}
+
+static const struct dev_pm_ops acp6x_pdm_pm_ops = {
+	SET_RUNTIME_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_resume)
+};
+
+static struct platform_driver acp6x_pdm_dma_driver = {
+	.probe = acp6x_pdm_audio_probe,
+	.remove = acp6x_pdm_audio_remove,
+	.driver = {
+		.name = "acp_yc_pdm_dma",
+		.pm = &acp6x_pdm_pm_ops,
+	},
+};
+
+module_platform_driver(acp6x_pdm_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP6x YC PDM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/yc/acp6x.h b/sound/soc/amd/yc/acp6x.h
new file mode 100644
index 000000000000..74b596e6807a
--- /dev/null
+++ b/sound/soc/amd/yc/acp6x.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * AMD ALSA SoC PDM Driver
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#include "acp6x_chip_offset_byte.h"
+
+#define ACP_DEVICE_ID 0x15E2
+#define ACP6x_PHY_BASE_ADDRESS 0x1240000
+#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_dev_data {
+	u32 pdm_irq;
+	void __iomem *acp6x_base;
+	struct snd_pcm_substream *capture_stream;
+};
+
+struct pdm_stream_instance {
+	u16 num_pages;
+	u16 channels;
+	dma_addr_t dma_addr;
+	u64 bytescount;
+	void __iomem *acp6x_base;
+};
+
+union acp_pdm_dma_count {
+	struct {
+	u32 low;
+	u32 high;
+	} bcount;
+	u64 bytescount;
+};
+
+static inline u32 acp6x_readl(void __iomem *base_addr)
+{
+	return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);
+}
+
+static inline void acp6x_writel(u32 val, void __iomem *base_addr)
+{
+	writel(val, base_addr - ACP6x_PHY_BASE_ADDRESS);
+}
diff --git a/sound/soc/amd/yc/acp6x_chip_offset_byte.h b/sound/soc/amd/yc/acp6x_chip_offset_byte.h
new file mode 100644
index 000000000000..f05fb2dfb5da
--- /dev/null
+++ b/sound/soc/amd/yc/acp6x_chip_offset_byte.h
@@ -0,0 +1,444 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * AMD ACP 6.x Register Documentation
+ *
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ */
+
+#ifndef _acp6x_OFFSET_HEADER
+#define _acp6x_OFFSET_HEADER
+
+/* Registers from ACP_DMA block */
+#define ACP_DMA_CNTL_0                                0x1240000
+#define ACP_DMA_CNTL_1                                0x1240004
+#define ACP_DMA_CNTL_2                                0x1240008
+#define ACP_DMA_CNTL_3                                0x124000C
+#define ACP_DMA_CNTL_4                                0x1240010
+#define ACP_DMA_CNTL_5                                0x1240014
+#define ACP_DMA_CNTL_6                                0x1240018
+#define ACP_DMA_CNTL_7                                0x124001C
+#define ACP_DMA_DSCR_STRT_IDX_0                       0x1240020
+#define ACP_DMA_DSCR_STRT_IDX_1                       0x1240024
+#define ACP_DMA_DSCR_STRT_IDX_2                       0x1240028
+#define ACP_DMA_DSCR_STRT_IDX_3                       0x124002C
+#define ACP_DMA_DSCR_STRT_IDX_4                       0x1240030
+#define ACP_DMA_DSCR_STRT_IDX_5                       0x1240034
+#define ACP_DMA_DSCR_STRT_IDX_6                       0x1240038
+#define ACP_DMA_DSCR_STRT_IDX_7                       0x124003C
+#define ACP_DMA_DSCR_CNT_0                            0x1240040
+#define ACP_DMA_DSCR_CNT_1                            0x1240044
+#define ACP_DMA_DSCR_CNT_2                            0x1240048
+#define ACP_DMA_DSCR_CNT_3                            0x124004C
+#define ACP_DMA_DSCR_CNT_4                            0x1240050
+#define ACP_DMA_DSCR_CNT_5                            0x1240054
+#define ACP_DMA_DSCR_CNT_6                            0x1240058
+#define ACP_DMA_DSCR_CNT_7                            0x124005C
+#define ACP_DMA_PRIO_0                                0x1240060
+#define ACP_DMA_PRIO_1                                0x1240064
+#define ACP_DMA_PRIO_2                                0x1240068
+#define ACP_DMA_PRIO_3                                0x124006C
+#define ACP_DMA_PRIO_4                                0x1240070
+#define ACP_DMA_PRIO_5                                0x1240074
+#define ACP_DMA_PRIO_6                                0x1240078
+#define ACP_DMA_PRIO_7                                0x124007C
+#define ACP_DMA_CUR_DSCR_0                            0x1240080
+#define ACP_DMA_CUR_DSCR_1                            0x1240084
+#define ACP_DMA_CUR_DSCR_2                            0x1240088
+#define ACP_DMA_CUR_DSCR_3                            0x124008C
+#define ACP_DMA_CUR_DSCR_4                            0x1240090
+#define ACP_DMA_CUR_DSCR_5                            0x1240094
+#define ACP_DMA_CUR_DSCR_6                            0x1240098
+#define ACP_DMA_CUR_DSCR_7                            0x124009C
+#define ACP_DMA_CUR_TRANS_CNT_0                       0x12400A0
+#define ACP_DMA_CUR_TRANS_CNT_1                       0x12400A4
+#define ACP_DMA_CUR_TRANS_CNT_2                       0x12400A8
+#define ACP_DMA_CUR_TRANS_CNT_3                       0x12400AC
+#define ACP_DMA_CUR_TRANS_CNT_4                       0x12400B0
+#define ACP_DMA_CUR_TRANS_CNT_5                       0x12400B4
+#define ACP_DMA_CUR_TRANS_CNT_6                       0x12400B8
+#define ACP_DMA_CUR_TRANS_CNT_7                       0x12400BC
+#define ACP_DMA_ERR_STS_0                             0x12400C0
+#define ACP_DMA_ERR_STS_1                             0x12400C4
+#define ACP_DMA_ERR_STS_2                             0x12400C8
+#define ACP_DMA_ERR_STS_3                             0x12400CC
+#define ACP_DMA_ERR_STS_4                             0x12400D0
+#define ACP_DMA_ERR_STS_5                             0x12400D4
+#define ACP_DMA_ERR_STS_6                             0x12400D8
+#define ACP_DMA_ERR_STS_7                             0x12400DC
+#define ACP_DMA_DESC_BASE_ADDR                        0x12400E0
+#define ACP_DMA_DESC_MAX_NUM_DSCR                     0x12400E4
+#define ACP_DMA_CH_STS                                0x12400E8
+#define ACP_DMA_CH_GROUP                              0x12400EC
+#define ACP_DMA_CH_RST_STS                            0x12400F0
+
+/* Registers from ACP_AXI2AXIATU block */
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1                0x1240C00
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_1                0x1240C04
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_2                0x1240C08
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_2                0x1240C0C
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_3                0x1240C10
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_3                0x1240C14
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_4                0x1240C18
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_4                0x1240C1C
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5                0x1240C20
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_5                0x1240C24
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_6                0x1240C28
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_6                0x1240C2C
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_7                0x1240C30
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_7                0x1240C34
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_8                0x1240C38
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_8                0x1240C3C
+#define ACPAXI2AXI_ATU_CTRL                           0x1240C40
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_9                0x1240C44
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_9                0x1240C48
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_10               0x1240C4C
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_10               0x1240C50
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_11               0x1240C54
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_11               0x1240C58
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_12               0x1240C5C
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_12               0x1240C60
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_13               0x1240C64
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_13               0x1240C68
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_14               0x1240C6C
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_14               0x1240C70
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_15               0x1240C74
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_15               0x1240C78
+#define ACPAXI2AXI_ATU_PAGE_SIZE_GRP_16               0x1240C7C
+#define ACPAXI2AXI_ATU_BASE_ADDR_GRP_16               0x1240C80
+
+/* Registers from ACP_CLKRST block */
+#define ACP_SOFT_RESET                                0x1241000
+#define ACP_CONTROL                                   0x1241004
+#define ACP_STATUS                                    0x1241008
+#define ACP_DYNAMIC_CG_MASTER_CONTROL                 0x1241010
+#define ACP_ZSC_DSP_CTRL                              0x1241014
+#define ACP_ZSC_STS                                   0x1241018
+#define ACP_PGFSM_CONTROL                             0x1241024
+#define ACP_PGFSM_STATUS                              0x1241028
+#define ACP_CLKMUX_SEL                                0x124102C
+
+/* Registers from ACP_AON block */
+#define ACP_PME_EN                                    0x1241400
+#define ACP_DEVICE_STATE                              0x1241404
+#define AZ_DEVICE_STATE                               0x1241408
+#define ACP_PIN_CONFIG                                0x1241440
+#define ACP_PAD_PULLUP_CTRL                           0x1241444
+#define ACP_PAD_PULLDOWN_CTRL                         0x1241448
+#define ACP_PAD_DRIVE_STRENGTH_CTRL                   0x124144C
+#define ACP_PAD_SCHMEN_CTRL                           0x1241450
+#define ACP_SW_PAD_KEEPER_EN                          0x1241454
+#define ACP_SW_WAKE_EN                                0x1241458
+#define ACP_I2S_WAKE_EN                               0x124145C
+#define ACP_SW1_WAKE_EN                               0x1241460
+
+/* Registers from ACP_P1_MISC block */
+#define ACP_EXTERNAL_INTR_ENB                         0x1241A00
+#define ACP_EXTERNAL_INTR_CNTL                        0x1241A04
+#define ACP_EXTERNAL_INTR_CNTL1                       0x1241A08
+#define ACP_EXTERNAL_INTR_STAT