[alsa-devel] [PATCH v6 1/6] ASoC: amd:Create multiple I2S platform device endpoint

[alsa-devel] [PATCH v6 1/6] ASoC: amd:Create multiple I2S platform device endpoint

[Ravulapati Vishnu vardhan rao]

Creates Platform Device endpoints for multiple
I2S instances: SP and  BT endpoints device.
Pass PCI resources like MMIO, irq to the platform devices.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/acp3x.h     |  5 +++
 sound/soc/amd/raven/pci-acp3x.c | 96 +++++++++++++++++++++++++++++------------
 2 files changed, 73 insertions(+), 28 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index 4f2cadd..2f15fe1 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -7,10 +7,15 @@
 
 #include "chip_offset_byte.h"
 
+#define ACP3x_DEVS		3
 #define ACP3x_PHY_BASE_ADDRESS 0x1240000
 #define	ACP3x_I2S_MODE	0
 #define	ACP3x_REG_START	0x1240000
 #define	ACP3x_REG_END	0x1250200
+#define ACP3x_I2STDM_REG_START	0x1242400
+#define ACP3x_I2STDM_REG_END	0x1242410
+#define ACP3x_BT_TDM_REG_START	0x1242800
+#define ACP3x_BT_TDM_REG_END	0x1242810
 #define I2S_MODE	0x04
 #define	BT_TX_THRESHOLD 26
 #define	BT_RX_THRESHOLD 25
diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c
index facec24..4c4601d 100644
--- a/sound/soc/amd/raven/pci-acp3x.c
+++ b/sound/soc/amd/raven/pci-acp3x.c
@@ -16,17 +16,17 @@ struct acp3x_dev_data {
 	void __iomem *acp3x_base;
 	bool acp3x_audio_mode;
 	struct resource *res;
-	struct platform_device *pdev;
+	struct platform_device *pdev[ACP3x_DEVS];
 };
 
 static int snd_acp3x_probe(struct pci_dev *pci,
 			   const struct pci_device_id *pci_id)
 {
-	int ret;
-	u32 addr, val;
 	struct acp3x_dev_data *adata;
-	struct platform_device_info pdevinfo;
+	struct platform_device_info pdevinfo[ACP3x_DEVS];
 	unsigned int irqflags;
+	int ret;
+	u32 addr, val, i;
 
 	if (pci_enable_device(pci)) {
 		dev_err(&pci->dev, "pci_enable_device failed\n");
@@ -43,7 +43,7 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 			     GFP_KERNEL);
 	if (!adata) {
 		ret = -ENOMEM;
-		goto release_regions;
+		goto adata_free;
 	}
 
 	/* check for msi interrupt support */
@@ -68,11 +68,11 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 	switch (val) {
 	case I2S_MODE:
 		adata->res = devm_kzalloc(&pci->dev,
-					  sizeof(struct resource) * 2,
+					  sizeof(struct resource) * 4,
 					  GFP_KERNEL);
 		if (!adata->res) {
 			ret = -ENOMEM;
-			goto unmap_mmio;
+			goto release_regions;
 		}
 
 		adata->res[0].name = "acp3x_i2s_iomem";
@@ -80,28 +80,52 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 		adata->res[0].start = addr;
 		adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
 
-		adata->res[1].name = "acp3x_i2s_irq";
-		adata->res[1].flags = IORESOURCE_IRQ;
-		adata->res[1].start = pci->irq;
-		adata->res[1].end = pci->irq;
+		adata->res[1].name = "acp3x_i2s_sp";
+		adata->res[1].flags = IORESOURCE_MEM;
+		adata->res[1].start = addr + ACP3x_I2STDM_REG_START;
+		adata->res[1].end = addr + ACP3x_I2STDM_REG_END;
+
+		adata->res[2].name = "acp3x_i2s_bt";
+		adata->res[2].flags = IORESOURCE_MEM;
+		adata->res[2].start = addr + ACP3x_BT_TDM_REG_START;
+		adata->res[2].end = addr + ACP3x_BT_TDM_REG_END;
+
+		adata->res[3].name = "acp3x_i2s_irq";
+		adata->res[3].flags = IORESOURCE_IRQ;
+		adata->res[3].start = pci->irq;
+		adata->res[3].end = adata->res[3].start;
 
 		adata->acp3x_audio_mode = ACP3x_I2S_MODE;
 
 		memset(&pdevinfo, 0, sizeof(pdevinfo));
-		pdevinfo.name = "acp3x_rv_i2s";
-		pdevinfo.id = 0;
-		pdevinfo.parent = &pci->dev;
-		pdevinfo.num_res = 2;
-		pdevinfo.res = adata->res;
-		pdevinfo.data = &irqflags;
-		pdevinfo.size_data = sizeof(irqflags);
-
-		adata->pdev = platform_device_register_full(&pdevinfo);
-		if (IS_ERR(adata->pdev)) {
-			dev_err(&pci->dev, "cannot register %s device\n",
-				pdevinfo.name);
-			ret = PTR_ERR(adata->pdev);
-			goto unmap_mmio;
+		pdevinfo[0].name = "acp3x_rv_i2s_dma";
+		pdevinfo[0].id = 0;
+		pdevinfo[0].parent = &pci->dev;
+		pdevinfo[0].num_res = 4;
+		pdevinfo[0].res = &adata->res[0];
+		pdevinfo[0].data = &irqflags;
+		pdevinfo[0].size_data = sizeof(irqflags);
+
+		pdevinfo[1].name = "acp3x_i2s_playcap";
+		pdevinfo[1].id = 0;
+		pdevinfo[1].parent = &pci->dev;
+		pdevinfo[1].num_res = 1;
+		pdevinfo[1].res = &adata->res[1];
+
+		pdevinfo[2].name = "acp3x_i2s_playcap";
+		pdevinfo[2].id = 1;
+		pdevinfo[2].parent = &pci->dev;
+		pdevinfo[2].num_res = 1;
+		pdevinfo[2].res = &adata->res[2];
+		for (i = 0; i < ACP3x_DEVS ; i++) {
+			adata->pdev[i] =
+				platform_device_register_full(&pdevinfo[i]);
+			if (IS_ERR(adata->pdev[i])) {
+				dev_err(&pci->dev, "cannot register %s device\n",
+					pdevinfo[i].name);
+				ret = PTR_ERR(adata->pdev[i]);
+				goto unmap_mmio;
+			}
 		}
 		break;
 	default:
@@ -112,10 +136,22 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 	return 0;
 
 unmap_mmio:
-	pci_disable_msi(pci);
+	for (i = 0 ; i < ACP3x_DEVS ; i++)
+		platform_device_unregister(adata->pdev[i]);
 	iounmap(adata->acp3x_base);
+	kfree(adata->res);
+	kfree(adata);
+	pci_disable_msi(pci);
+	pci_release_regions(pci);
+	pci_disable_device(pci);
 release_regions:
+	kfree(adata);
+	pci_disable_msi(pci);
+	pci_release_regions(pci);
+	pci_disable_device(pci);
+adata_free:
 	pci_release_regions(pci);
+	pci_disable_device(pci);
 disable_pci:
 	pci_disable_device(pci);
 
@@ -125,10 +161,13 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 static void snd_acp3x_remove(struct pci_dev *pci)
 {
 	struct acp3x_dev_data *adata = pci_get_drvdata(pci);
+	int i;
 
-	platform_device_unregister(adata->pdev);
+	if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) {
+		for (i = 0 ; i <  ACP3x_DEVS ; i++)
+			platform_device_unregister(adata->pdev[i]);
+	}
 	iounmap(adata->acp3x_base);
-
 	pci_disable_msi(pci);
 	pci_release_regions(pci);
 	pci_disable_device(pci);
@@ -151,6 +190,7 @@ static struct pci_driver acp3x_driver  = {
 
 module_pci_driver(acp3x_driver);
 
+MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
 MODULE_DESCRIPTION("AMD ACP3x PCI driver");
 MODULE_LICENSE("GPL v2");
-- 
2.7.4

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Re: [alsa-devel] [PATCH v6 1/6] ASoC: amd:Create multiple I2S platform device endpoint

[Dan Carpenter]

I'm sorry but the probe error handling is totally broken.  It has a
bunch of double frees.  Here is how it should work:

On Fri, Nov 15, 2019 at 05:40:18PM +0530, Ravulapati Vishnu vardhan rao wrote:
>  static int snd_acp3x_probe(struct pci_dev *pci,
>  			   const struct pci_device_id *pci_id)
>  {
> -	int ret;
> -	u32 addr, val;
>  	struct acp3x_dev_data *adata;
> -	struct platform_device_info pdevinfo;
> +	struct platform_device_info pdevinfo[ACP3x_DEVS];
>  	unsigned int irqflags;
> +	int ret;
> +	u32 addr, val, i;

Make i an int.  Loop iterators should be int unless we are going to
loop more than INT_MAX times (which hopefully is seldom in the kernel).

>  
>  	if (pci_enable_device(pci)) {

Ideally this should preserve the error code from pci_enable_device().

	ret = pci_enable_device(pci);
	if (ret)
		return ret;

But 1) you didn't introduce this.  2) This code is basically fine.
This is the first resource allocation so there is no error handling, we
just return ret.  But after this the most recently allocated resource is
'pci enable' if we hit an error now we will want to do
"goto err_pci_disable;"

>  		dev_err(&pci->dev, "pci_enable_device failed\n");
> @@ -43,7 +43,7 @@ static int snd_acp3x_probe(struct pci_dev *pci,

There is a bit where we request regions so now that's the most recent
resource.

>  			     GFP_KERNEL);
>  	if (!adata) {
>  		ret = -ENOMEM;
> -		goto release_regions;
> +		goto adata_free;

We failed to allocate "adata" so we have to release the most recent
resource "goto err_release_regions;".  "adata" is allocated with
devm_kzalloc() so it gets freed automatically after probe().  If we
free it ourselves with kfree() that will lead to a double free.  So
let's remember requet regions still as our most recent allocation.


>  	}
>  
>  	/* check for msi interrupt support */
> @@ -68,11 +68,11 @@ static int snd_acp3x_probe(struct pci_dev *pci,
>  	switch (val) {
>  	case I2S_MODE:
>  		adata->res = devm_kzalloc(&pci->dev,
> -					  sizeof(struct resource) * 2,
> +					  sizeof(struct resource) * 4,
>  					  GFP_KERNEL);
>  		if (!adata->res) {
>  			ret = -ENOMEM;
> -			goto unmap_mmio;
> +			goto release_regions;


unmap_mmio is still the most recent so the labal was correct.  The
advantage of this style of error handling is that when we add new
allocations, we don't have to change a lot of labels.  adata->res uses
devm_kzalloc() again so we keep unmap_mmio in our head as the most
recent allocation.

>  		}
>  
>  		adata->res[0].name = "acp3x_i2s_iomem";
> @@ -80,28 +80,52 @@ static int snd_acp3x_probe(struct pci_dev *pci,
>  		adata->res[0].start = addr;
>  		adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
>  
> -		adata->res[1].name = "acp3x_i2s_irq";
> -		adata->res[1].flags = IORESOURCE_IRQ;
> -		adata->res[1].start = pci->irq;
> -		adata->res[1].end = pci->irq;
> +		adata->res[1].name = "acp3x_i2s_sp";
> +		adata->res[1].flags = IORESOURCE_MEM;
> +		adata->res[1].start = addr + ACP3x_I2STDM_REG_START;
> +		adata->res[1].end = addr + ACP3x_I2STDM_REG_END;
> +
> +		adata->res[2].name = "acp3x_i2s_bt";
> +		adata->res[2].flags = IORESOURCE_MEM;
> +		adata->res[2].start = addr + ACP3x_BT_TDM_REG_START;
> +		adata->res[2].end = addr + ACP3x_BT_TDM_REG_END;
> +
> +		adata->res[3].name = "acp3x_i2s_irq";
> +		adata->res[3].flags = IORESOURCE_IRQ;
> +		adata->res[3].start = pci->irq;
> +		adata->res[3].end = adata->res[3].start;
>  
>  		adata->acp3x_audio_mode = ACP3x_I2S_MODE;
>  
>  		memset(&pdevinfo, 0, sizeof(pdevinfo));
> -		pdevinfo.name = "acp3x_rv_i2s";
> -		pdevinfo.id = 0;
> -		pdevinfo.parent = &pci->dev;
> -		pdevinfo.num_res = 2;
> -		pdevinfo.res = adata->res;
> -		pdevinfo.data = &irqflags;
> -		pdevinfo.size_data = sizeof(irqflags);
> -
> -		adata->pdev = platform_device_register_full(&pdevinfo);
> -		if (IS_ERR(adata->pdev)) {
> -			dev_err(&pci->dev, "cannot register %s device\n",
> -				pdevinfo.name);
> -			ret = PTR_ERR(adata->pdev);
> -			goto unmap_mmio;
> +		pdevinfo[0].name = "acp3x_rv_i2s_dma";
> +		pdevinfo[0].id = 0;
> +		pdevinfo[0].parent = &pci->dev;
> +		pdevinfo[0].num_res = 4;
> +		pdevinfo[0].res = &adata->res[0];
> +		pdevinfo[0].data = &irqflags;
> +		pdevinfo[0].size_data = sizeof(irqflags);
> +
> +		pdevinfo[1].name = "acp3x_i2s_playcap";
> +		pdevinfo[1].id = 0;
> +		pdevinfo[1].parent = &pci->dev;
> +		pdevinfo[1].num_res = 1;
> +		pdevinfo[1].res = &adata->res[1];
> +
> +		pdevinfo[2].name = "acp3x_i2s_playcap";
> +		pdevinfo[2].id = 1;
> +		pdevinfo[2].parent = &pci->dev;
> +		pdevinfo[2].num_res = 1;
> +		pdevinfo[2].res = &adata->res[2];
> +		for (i = 0; i < ACP3x_DEVS ; i++) {
> +			adata->pdev[i] =
> +				platform_device_register_full(&pdevinfo[i]);
> +			if (IS_ERR(adata->pdev[i])) {
> +				dev_err(&pci->dev, "cannot register %s device\n",
> +					pdevinfo[i].name);
> +				ret = PTR_ERR(adata->pdev[i]);
> +				goto unmap_mmio;
> +			}

Loops are a bit complicated.  What we do is if we allocate more than one
thing inside the loop, then we free until the start of the most recent
iteration:
		for (i = 0; i < end; i++) {
			foo->a = alloc();
			if (!foo->a)
				goto unwind_loop;
			foo->b = alloc();
			if (!foo->b) {
				free(foo->a);
				goto unwind_loop;
			}
			foo->c = alloc();
			if (!foo->c) {
				free(foo->b);
				free(foo->a);
				goto unwind_loop;
			}
		}

But this loop only allocates one thing so it's fine.  We can just
goto unwind_loop;

>  		}
>  		break;
>  	default:
> @@ -112,10 +136,22 @@ static int snd_acp3x_probe(struct pci_dev *pci,
>  	return 0;
>  

Then at the end it looks like:

   136          return 0;
   137  
   138  unwind_loop:
   139          if (val == I2S_MODE) {
   140                  while (--i >= 0)
   141                          platform_device_unregister(adata->pdev[i]);
   142          }
   143  unmap_mmio:
   144          iounmap(adata->acp3x_base);
   145  disable_msi:
   146          pci_disable_msi(pci);
   147  release_regions:
   148          pci_release_regions(pci);
   149  disable_pci:
   150          pci_disable_device(pci);
   151  
   152          return ret;
   153  }

Note, that I have an if (val == I2S_MODE).  It's not required but the
unwind code should be a mirror image of the allocation code and it's
better for future proofing.

Also if "i" is unsigned this error handling will break.  We see that
bug with unsigned loop iterators pretty frequently.

regards,
dan carpenter

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[alsa-devel] [PATCH v6 2/6] ASoC: amd: Refactoring of DAI from DMA driver

[Ravulapati Vishnu vardhan rao]

Asoc: PCM DMA driver should only have dma ops.
So Removed all DAI related functionality.Refactoring
the PCM DMA driver code.Added new file containing only DAI ops.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/Makefile        |   2 +
 sound/soc/amd/raven/acp3x-i2s.c     | 275 +++++++++++++++++++++++++++++++
 sound/soc/amd/raven/acp3x-pcm-dma.c | 318 ++++++++----------------------------
 sound/soc/amd/raven/acp3x.h         |  42 +++++
 4 files changed, 390 insertions(+), 247 deletions(-)
 create mode 100644 sound/soc/amd/raven/acp3x-i2s.c

diff --git a/sound/soc/amd/raven/Makefile b/sound/soc/amd/raven/Makefile
index 108d1ac..62c22b6 100644
--- a/sound/soc/amd/raven/Makefile
+++ b/sound/soc/amd/raven/Makefile
@@ -2,5 +2,7 @@
 # Raven Ridge platform Support
 snd-pci-acp3x-objs	:= pci-acp3x.o
 snd-acp3x-pcm-dma-objs	:= acp3x-pcm-dma.o
+snd-acp3x-i2s-objs	:= acp3x-i2s.o
 obj-$(CONFIG_SND_SOC_AMD_ACP3x)	 += snd-pci-acp3x.o
 obj-$(CONFIG_SND_SOC_AMD_ACP3x)	 += snd-acp3x-pcm-dma.o
+obj-$(CONFIG_SND_SOC_AMD_ACP3x)	 += snd-acp3x-i2s.o
diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
new file mode 100644
index 0000000..df62c17
--- /dev/null
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD ALSA SoC PCM Driver
+//
+//Copyright 2016 Advanced Micro Devices, Inc.
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <linux/dma-mapping.h>
+
+#include "acp3x.h"
+
+#define DRV_NAME "acp3x-i2s"
+
+static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct i2s_dev_data *adata;
+
+	adata = snd_soc_dai_get_drvdata(cpu_dai);
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		adata->tdm_mode = false;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		adata->tdm_mode = true;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
+		u32 rx_mask, int slots, int slot_width)
+{
+	struct i2s_dev_data *adata;
+	u32 val;
+	u16 slot_len;
+
+	adata = snd_soc_dai_get_drvdata(cpu_dai);
+
+	/* These values are as per Hardware Spec */
+
+	switch (slot_width) {
+	case SLOT_WIDTH_8:
+		slot_len = 8;
+		break;
+	case SLOT_WIDTH_16:
+		slot_len = 16;
+		break;
+	case SLOT_WIDTH_24:
+		slot_len = 24;
+		break;
+	case SLOT_WIDTH_32:
+		slot_len = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
+	rv_writel(val | 0x2, adata->acp3x_base + mmACP_BTTDM_ITER);
+	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
+	rv_writel(val | 0x2, adata->acp3x_base + mmACP_BTTDM_IRER);
+
+	val = FRM_LEN | (slots << 15) | (slot_len << 18);
+	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
+	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
+
+	adata->tdm_fmt = val;
+	return 0;
+}
+
+static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *dai)
+{
+	struct i2s_stream_instance *rtd;
+	u32 val;
+	u32 reg_val;
+
+	rtd = substream->runtime->private_data;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_U8:
+	case SNDRV_PCM_FORMAT_S8:
+		rtd->xfer_resolution = 0x0;
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		rtd->xfer_resolution = 0x02;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		rtd->xfer_resolution = 0x04;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		rtd->xfer_resolution = 0x05;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		reg_val = mmACP_BTTDM_ITER;
+	else
+		reg_val = mmACP_BTTDM_IRER;
+
+	val = rv_readl(rtd->acp3x_base + reg_val);
+	val = val | (rtd->xfer_resolution  << 3);
+	rv_writel(val, rtd->acp3x_base + reg_val);
+	return 0;
+}
+
+static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
+		int cmd, struct snd_soc_dai *dai)
+{
+	struct i2s_stream_instance *rtd;
+	u32 val, period_bytes;
+	int ret, reg_val;
+
+	rtd = substream->runtime->private_data;
+	period_bytes = frames_to_bytes(substream->runtime,
+			substream->runtime->period_size);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		rtd->bytescount = acp_get_byte_count(rtd,
+						substream->stream);
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			reg_val = mmACP_BTTDM_ITER;
+			rv_writel(period_bytes, rtd->acp3x_base +
+					mmACP_BT_TX_INTR_WATERMARK_SIZE);
+		} else {
+			reg_val = mmACP_BTTDM_IRER;
+			rv_writel(period_bytes, rtd->acp3x_base +
+					mmACP_BT_RX_INTR_WATERMARK_SIZE);
+		}
+		val = rv_readl(rtd->acp3x_base + reg_val);
+		val = val | BIT(0);
+		rv_writel(val, rtd->acp3x_base + reg_val);
+		rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			reg_val = mmACP_BTTDM_ITER;
+		else
+			reg_val = mmACP_BTTDM_IRER;
+
+		val = rv_readl(rtd->acp3x_base + reg_val);
+		val = val & ~BIT(0);
+		rv_writel(val, rtd->acp3x_base + reg_val);
+		rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static struct snd_soc_dai_ops acp3x_i2s_dai_ops = {
+	.hw_params = acp3x_i2s_hwparams,
+	.trigger   = acp3x_i2s_trigger,
+	.set_fmt = acp3x_i2s_set_fmt,
+	.set_tdm_slot = acp3x_i2s_set_tdm_slot,
+};
+
+static const struct snd_soc_component_driver acp3x_dai_component = {
+	.name           = "acp3x-i2s",
+};
+
+static struct snd_soc_dai_driver acp3x_i2s_dai = {
+	.playback = {
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+			SNDRV_PCM_FMTBIT_U8 |
+			SNDRV_PCM_FMTBIT_S24_LE |
+			SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 8,
+
+		.rate_min = 8000,
+		.rate_max = 96000,
+	},
+	.capture = {
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+			SNDRV_PCM_FMTBIT_U8 |
+			SNDRV_PCM_FMTBIT_S24_LE |
+			SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 2,
+		.rate_min = 8000,
+		.rate_max = 48000,
+	},
+	.ops = &acp3x_i2s_dai_ops,
+};
+
+
+static int acp3x_dai_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct i2s_dev_data *adata;
+	int status, ret;
+
+	adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
+			GFP_KERNEL);
+	if (!adata)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
+			resource_size(res));
+	if (IS_ERR(adata->acp3x_base))
+		return PTR_ERR(adata->acp3x_base);
+
+	adata->i2s_irq = res->start;
+	dev_set_drvdata(&pdev->dev, adata);
+	status = devm_snd_soc_register_component(&pdev->dev,
+			&acp3x_dai_component,
+			&acp3x_i2s_dai, 1);
+	if (status) {
+		dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
+		ret = -ENODEV;
+		goto dev_err;
+	}
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+	return 0;
+dev_err:
+	iounmap(adata->acp3x_base);
+	kfree(adata);
+	return ret;
+err:
+	kfree(adata);
+	return ret;
+}
+
+static int acp3x_dai_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+static struct platform_driver acp3x_dai_driver = {
+	.probe = acp3x_dai_probe,
+	.remove = acp3x_dai_remove,
+	.driver = {
+		.name = "acp3x_i2s_playcap",
+	},
+};
+
+module_platform_driver(acp3x_dai_driver);
+
+MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
+MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index 60709e3..ffd7cd1 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -18,24 +18,6 @@
 
 #define DRV_NAME "acp3x-i2s-audio"
 
-struct i2s_dev_data {
-	bool tdm_mode;
-	unsigned int i2s_irq;
-	u32 tdm_fmt;
-	void __iomem *acp3x_base;
-	struct snd_pcm_substream *play_stream;
-	struct snd_pcm_substream *capture_stream;
-};
-
-struct i2s_stream_instance {
-	u16 num_pages;
-	u16 channels;
-	u32 xfer_resolution;
-	u64 bytescount;
-	dma_addr_t dma_addr;
-	void __iomem *acp3x_base;
-};
-
 static const struct snd_pcm_hardware acp3x_pcm_hardware_playback = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
@@ -178,10 +160,11 @@ static int acp3x_deinit(void __iomem *acp3x_base)
 
 static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
 {
+	struct i2s_dev_data *rv_i2s_data;
 	u16 play_flag, cap_flag;
 	u32 val;
-	struct i2s_dev_data *rv_i2s_data = dev_id;
 
+	rv_i2s_data = dev_id;
 	if (!rv_i2s_data)
 		return IRQ_NONE;
 
@@ -278,11 +261,18 @@ static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
 static int acp3x_dma_open(struct snd_soc_component *component,
 			  struct snd_pcm_substream *substream)
 {
-	int ret = 0;
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct i2s_dev_data *adata = dev_get_drvdata(component->dev);
-	struct i2s_stream_instance *i2s_data = kzalloc(sizeof(struct i2s_stream_instance),
-						       GFP_KERNEL);
+	struct snd_pcm_runtime *runtime;
+	struct snd_soc_pcm_runtime *prtd;
+	struct i2s_dev_data *adata;
+	struct i2s_stream_instance *i2s_data;
+	int ret;
+
+	runtime = substream->runtime;
+	prtd = substream->private_data;
+	component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
+	adata = dev_get_drvdata(component->dev);
+	i2s_data = kzalloc(sizeof(struct i2s_stream_instance),
+						GFP_KERNEL);
 	if (!i2s_data)
 		return -EINVAL;
 
@@ -312,33 +302,18 @@ static int acp3x_dma_open(struct snd_soc_component *component,
 	return 0;
 }
 
-static u64 acp_get_byte_count(struct i2s_stream_instance *rtd, int direction)
-{
-	u64 byte_count;
-
-	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
-		byte_count = rv_readl(rtd->acp3x_base +
-				      mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH);
-		byte_count |= rv_readl(rtd->acp3x_base +
-				       mmACP_BT_TX_LINEARPOSITIONCNTR_LOW);
-	} else {
-		byte_count = rv_readl(rtd->acp3x_base +
-				      mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH);
-		byte_count |= rv_readl(rtd->acp3x_base +
-				       mmACP_BT_RX_LINEARPOSITIONCNTR_LOW);
-	}
-	return byte_count;
-}
 
 static int acp3x_dma_hw_params(struct snd_soc_component *component,
 			       struct snd_pcm_substream *substream,
 			       struct snd_pcm_hw_params *params)
 {
+	struct snd_pcm_runtime *runtime;
+	struct i2s_stream_instance *rtd;
 	int status;
 	u64 size;
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct i2s_stream_instance *rtd = runtime->private_data;
 
+	runtime = substream->runtime;
+	rtd = substream->private_data;
 	if (!rtd)
 		return -EINVAL;
 
@@ -362,12 +337,12 @@ static int acp3x_dma_hw_params(struct snd_soc_component *component,
 static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
 					   struct snd_pcm_substream *substream)
 {
-	u32 pos = 0;
-	u32 buffersize = 0;
-	u64 bytescount = 0;
-	struct i2s_stream_instance *rtd =
-		substream->runtime->private_data;
+	struct i2s_stream_instance *rtd;
+	u32 pos;
+	u32 buffersize;
+	u64 bytescount;
 
+	rtd = substream->runtime->private_data;
 	buffersize = frames_to_bytes(substream->runtime,
 				     substream->runtime->buffer_size);
 	bytescount = acp_get_byte_count(rtd, substream->stream);
@@ -380,7 +355,10 @@ static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
 static int acp3x_dma_new(struct snd_soc_component *component,
 			 struct snd_soc_pcm_runtime *rtd)
 {
-	struct device *parent = component->dev->parent;
+	struct device *parent;
+
+	component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+	parent = component->dev->parent;
 	snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
 					      parent, MIN_BUFFER, MAX_BUFFER);
 	return 0;
@@ -402,8 +380,12 @@ static int acp3x_dma_mmap(struct snd_soc_component *component,
 static int acp3x_dma_close(struct snd_soc_component *component,
 			   struct snd_pcm_substream *substream)
 {
-	struct i2s_stream_instance *rtd = substream->runtime->private_data;
-	struct i2s_dev_data *adata = dev_get_drvdata(component->dev);
+	struct snd_soc_pcm_runtime *prtd;
+	struct i2s_dev_data *adata;
+
+	prtd = substream->private_data;
+	component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
+	adata = dev_get_drvdata(component->dev);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		adata->play_stream = NULL;
@@ -415,186 +397,9 @@ static int acp3x_dma_close(struct snd_soc_component *component,
 	 */
 	if (!adata->play_stream && !adata->capture_stream)
 		rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
-	kfree(rtd);
 	return 0;
 }
 
-static int acp3x_dai_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
-{
-
-	struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
-
-	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
-	case SND_SOC_DAIFMT_I2S:
-		adata->tdm_mode = false;
-		break;
-	case SND_SOC_DAIFMT_DSP_A:
-		adata->tdm_mode = true;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int acp3x_dai_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
-				  u32 rx_mask, int slots, int slot_width)
-{
-	u32 val = 0;
-	u16 slot_len;
-
-	struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
-
-	switch (slot_width) {
-	case SLOT_WIDTH_8:
-		slot_len = 8;
-		break;
-	case SLOT_WIDTH_16:
-		slot_len = 16;
-		break;
-	case SLOT_WIDTH_24:
-		slot_len = 24;
-		break;
-	case SLOT_WIDTH_32:
-		slot_len = 0;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
-	rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER);
-	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
-	rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER);
-
-	val = (FRM_LEN | (slots << 15) | (slot_len << 18));
-	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
-	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
-
-	adata->tdm_fmt = val;
-	return 0;
-}
-
-static int acp3x_dai_i2s_hwparams(struct snd_pcm_substream *substream,
-				  struct snd_pcm_hw_params *params,
-				  struct snd_soc_dai *dai)
-{
-	u32 val = 0;
-	struct i2s_stream_instance *rtd = substream->runtime->private_data;
-
-	switch (params_format(params)) {
-	case SNDRV_PCM_FORMAT_U8:
-	case SNDRV_PCM_FORMAT_S8:
-		rtd->xfer_resolution = 0x0;
-		break;
-	case SNDRV_PCM_FORMAT_S16_LE:
-		rtd->xfer_resolution = 0x02;
-		break;
-	case SNDRV_PCM_FORMAT_S24_LE:
-		rtd->xfer_resolution = 0x04;
-		break;
-	case SNDRV_PCM_FORMAT_S32_LE:
-		rtd->xfer_resolution = 0x05;
-		break;
-	default:
-		return -EINVAL;
-	}
-	val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
-	val = val | (rtd->xfer_resolution  << 3);
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
-	else
-		rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
-
-	return 0;
-}
-
-static int acp3x_dai_i2s_trigger(struct snd_pcm_substream *substream,
-				 int cmd, struct snd_soc_dai *dai)
-{
-	int ret = 0;
-	struct i2s_stream_instance *rtd = substream->runtime->private_data;
-	u32 val, period_bytes;
-
-	period_bytes = frames_to_bytes(substream->runtime,
-				       substream->runtime->period_size);
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-	case SNDRV_PCM_TRIGGER_RESUME:
-	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-		rtd->bytescount = acp_get_byte_count(rtd, substream->stream);
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-			rv_writel(period_bytes, rtd->acp3x_base +
-				  mmACP_BT_TX_INTR_WATERMARK_SIZE);
-			val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
-			val = val | BIT(0);
-			rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
-		} else {
-			rv_writel(period_bytes, rtd->acp3x_base +
-				  mmACP_BT_RX_INTR_WATERMARK_SIZE);
-			val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER);
-			val = val | BIT(0);
-			rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
-		}
-		rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER);
-		break;
-	case SNDRV_PCM_TRIGGER_STOP:
-	case SNDRV_PCM_TRIGGER_SUSPEND:
-	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-			val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER);
-			val = val & ~BIT(0);
-			rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER);
-		} else {
-			val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER);
-			val = val & ~BIT(0);
-			rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER);
-		}
-		rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
-		break;
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	return ret;
-}
-
-static struct snd_soc_dai_ops acp3x_dai_i2s_ops = {
-	.hw_params = acp3x_dai_i2s_hwparams,
-	.trigger   = acp3x_dai_i2s_trigger,
-	.set_fmt = acp3x_dai_i2s_set_fmt,
-	.set_tdm_slot = acp3x_dai_set_tdm_slot,
-};
-
-static struct snd_soc_dai_driver acp3x_i2s_dai_driver = {
-	.playback = {
-		.rates = SNDRV_PCM_RATE_8000_96000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
-					SNDRV_PCM_FMTBIT_U8 |
-					SNDRV_PCM_FMTBIT_S24_LE |
-					SNDRV_PCM_FMTBIT_S32_LE,
-		.channels_min = 2,
-		.channels_max = 8,
-
-		.rate_min = 8000,
-		.rate_max = 96000,
-	},
-	.capture = {
-		.rates = SNDRV_PCM_RATE_8000_48000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
-					SNDRV_PCM_FMTBIT_U8 |
-					SNDRV_PCM_FMTBIT_S24_LE |
-					SNDRV_PCM_FMTBIT_S32_LE,
-		.channels_min = 2,
-		.channels_max = 2,
-		.rate_min = 8000,
-		.rate_max = 48000,
-	},
-	.ops = &acp3x_dai_i2s_ops,
-};
-
 static const struct snd_soc_component_driver acp3x_i2s_component = {
 	.name		= DRV_NAME,
 	.open		= acp3x_dma_open,
@@ -609,10 +414,10 @@ static const struct snd_soc_component_driver acp3x_i2s_component = {
 
 static int acp3x_audio_probe(struct platform_device *pdev)
 {
-	int status;
 	struct resource *res;
 	struct i2s_dev_data *adata;
 	unsigned int irqflags;
+	int status, ret;
 
 	if (!pdev->dev.platform_data) {
 		dev_err(&pdev->dev, "platform_data not retrieved\n");
@@ -622,65 +427,80 @@ static int acp3x_audio_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
-		dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
 		return -ENODEV;
 	}
 
 	adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
 	if (!adata)
 		return -ENOMEM;
-
 	adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
 					 resource_size(res));
-
+	if (!adata->acp3x_base) {
+		ret = -ENOMEM;
+		goto base_err;
+	}
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
-		return -ENODEV;
+		ret = -ENOMEM;
+		goto io_irq;
 	}
 
 	adata->i2s_irq = res->start;
-	adata->play_stream = NULL;
-	adata->capture_stream = NULL;
 
 	dev_set_drvdata(&pdev->dev, adata);
 	/* Initialize ACP */
 	status = acp3x_init(adata->acp3x_base);
-	if (status)
-		return -ENODEV;
+	if (status) {
+		ret = -ENODEV;
+		goto io_irq;
+	}
 	status = devm_snd_soc_register_component(&pdev->dev,
 						 &acp3x_i2s_component,
-						 &acp3x_i2s_dai_driver, 1);
+						 NULL, 0);
 	if (status) {
-		dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
+		dev_err(&pdev->dev, "Fail to register acp i2s component\n");
+		ret = -ENODEV;
 		goto dev_err;
 	}
 	status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
 				  irqflags, "ACP3x_I2S_IRQ", adata);
 	if (status) {
 		dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
+		ret = -ENODEV;
 		goto dev_err;
 	}
 
-	pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
 	pm_runtime_use_autosuspend(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
 	return 0;
+
 dev_err:
+	iounmap(adata->acp3x_base);
+	kfree(adata);
 	status = acp3x_deinit(adata->acp3x_base);
 	if (status)
 		dev_err(&pdev->dev, "ACP de-init failed\n");
 	else
 		dev_info(&pdev->dev, "ACP de-initialized\n");
-	/*ignore device status and return driver probe error*/
-	return -ENODEV;
+	return ret;
+io_irq:
+	iounmap(adata->acp3x_base);
+	kfree(adata);
+	return ret;
+base_err:
+	kfree(adata);
+	return ret;
 }
 
 static int acp3x_audio_remove(struct platform_device *pdev)
 {
+	struct i2s_dev_data *adata;
 	int ret;
-	struct i2s_dev_data *adata = dev_get_drvdata(&pdev->dev);
 
+	adata = dev_get_drvdata(&pdev->dev);
 	ret = acp3x_deinit(adata->acp3x_base);
 	if (ret)
 		dev_err(&pdev->dev, "ACP de-init failed\n");
@@ -693,10 +513,11 @@ static int acp3x_audio_remove(struct platform_device *pdev)
 
 static int acp3x_resume(struct device *dev)
 {
+	struct i2s_dev_data *adata;
 	int status;
 	u32 val;
-	struct i2s_dev_data *adata = dev_get_drvdata(dev);
 
+	adata = dev_get_drvdata(dev);
 	status = acp3x_init(adata->acp3x_base);
 	if (status)
 		return -ENODEV;
@@ -738,8 +559,9 @@ static int acp3x_resume(struct device *dev)
 
 static int acp3x_pcm_runtime_suspend(struct device *dev)
 {
+	struct i2s_dev_data *adata;
 	int status;
-	struct i2s_dev_data *adata = dev_get_drvdata(dev);
+	adata = dev_get_drvdata(dev);
 
 	status = acp3x_deinit(adata->acp3x_base);
 	if (status)
@@ -754,8 +576,9 @@ static int acp3x_pcm_runtime_suspend(struct device *dev)
 
 static int acp3x_pcm_runtime_resume(struct device *dev)
 {
+	struct i2s_dev_data *adata;
 	int status;
-	struct i2s_dev_data *adata = dev_get_drvdata(dev);
+	adata = dev_get_drvdata(dev);
 
 	status = acp3x_init(adata->acp3x_base);
 	if (status)
@@ -774,13 +597,14 @@ static struct platform_driver acp3x_dma_driver = {
 	.probe = acp3x_audio_probe,
 	.remove = acp3x_audio_remove,
 	.driver = {
-		.name = "acp3x_rv_i2s",
+		.name = "acp3x_rv_i2s_dma",
 		.pm = &acp3x_pm_ops,
 	},
 };
 
 module_platform_driver(acp3x_dma_driver);
 
+MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index 2f15fe1..72c1a23 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -51,6 +51,29 @@
 #define SLOT_WIDTH_24 0x18
 #define SLOT_WIDTH_32 0x20
 
+struct acp3x_platform_info {
+	u16 play_i2s_instance;
+	u16 cap_i2s_instance;
+	u16 capture_channel;
+};
+
+struct i2s_dev_data {
+	bool tdm_mode;
+	unsigned int i2s_irq;
+	u32 tdm_fmt;
+	void __iomem *acp3x_base;
+	struct snd_pcm_substream *play_stream;
+	struct snd_pcm_substream *capture_stream;
+};
+
+struct i2s_stream_instance {
+	u16 num_pages;
+	u16 channels;
+	u32 xfer_resolution;
+	u64 bytescount;
+	dma_addr_t dma_addr;
+	void __iomem *acp3x_base;
+};
 
 static inline u32 rv_readl(void __iomem *base_addr)
 {
@@ -61,3 +84,22 @@ static inline void rv_writel(u32 val, void __iomem *base_addr)
 {
 	writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS);
 }
+
+static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd,
+							int direction)
+{
+	u64 byte_count;
+
+	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+		byte_count = rv_readl(rtd->acp3x_base +
+				mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH);
+		byte_count |= rv_readl(rtd->acp3x_base +
+				mmACP_BT_TX_LINEARPOSITIONCNTR_LOW);
+	} else {
+		byte_count = rv_readl(rtd->acp3x_base +
+				mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH);
+		byte_count |= rv_readl(rtd->acp3x_base +
+				mmACP_BT_RX_LINEARPOSITIONCNTR_LOW);
+	}
+	return byte_count;
+}
-- 
2.7.4

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Alsa-devel@alsa-project.org
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[alsa-devel] [PATCH v6 3/6] ASoC: amd: Enabling I2S instance in DMA and DAI

[Ravulapati Vishnu vardhan rao]

This patch adds I2S SP support in ACP PCM DMA and DAI.
Added I2S support in DMA and DAI probe,its hw_params handling
its open and close functionalities.
This enable to open and close on the SP instance for
playback and capture.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/acp3x-i2s.c     | 119 ++++++++++++++++++----
 sound/soc/amd/raven/acp3x-pcm-dma.c | 193 +++++++++++++++++++++++++-----------
 sound/soc/amd/raven/acp3x.h         |  74 +++++++++++---
 3 files changed, 294 insertions(+), 92 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index df62c17..247b9f5 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -85,10 +85,22 @@ static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *dai)
 {
 	struct i2s_stream_instance *rtd;
+	struct snd_soc_pcm_runtime *prtd;
+	struct snd_soc_card *card;
+	struct acp3x_platform_info *pinfo;
 	u32 val;
 	u32 reg_val;
 
+	prtd = substream->private_data;
 	rtd = substream->runtime->private_data;
+	card = prtd->card;
+	pinfo = snd_soc_card_get_drvdata(card);
+	if (pinfo) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rtd->i2s_instance = pinfo->play_i2s_instance;
+		else
+			rtd->i2s_instance = pinfo->cap_i2s_instance;
+	}
 
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_U8:
@@ -107,11 +119,25 @@ static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
 	default:
 		return -EINVAL;
 	}
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		reg_val = mmACP_BTTDM_ITER;
-	else
-		reg_val = mmACP_BTTDM_IRER;
-
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_ITER;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_ITER;
+		}
+	} else {
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_IRER;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_IRER;
+		}
+	}
 	val = rv_readl(rtd->acp3x_base + reg_val);
 	val = val | (rtd->xfer_resolution  << 3);
 	rv_writel(val, rtd->acp3x_base + reg_val);
@@ -122,10 +148,21 @@ static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
 		int cmd, struct snd_soc_dai *dai)
 {
 	struct i2s_stream_instance *rtd;
-	u32 val, period_bytes;
-	int ret, reg_val;
+	struct snd_soc_pcm_runtime *prtd;
+	struct snd_soc_card *card;
+	struct acp3x_platform_info *pinfo;
+	u32 ret, val, period_bytes, reg_val, ier_val, water_val;
 
+	prtd = substream->private_data;
 	rtd = substream->runtime->private_data;
+	card = prtd->card;
+	pinfo = snd_soc_card_get_drvdata(card);
+	if (pinfo) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rtd->i2s_instance = pinfo->play_i2s_instance;
+		else
+			rtd->i2s_instance = pinfo->cap_i2s_instance;
+	}
 	period_bytes = frames_to_bytes(substream->runtime,
 			substream->runtime->period_size);
 	switch (cmd) {
@@ -135,31 +172,75 @@ static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
 		rtd->bytescount = acp_get_byte_count(rtd,
 						substream->stream);
 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-			reg_val = mmACP_BTTDM_ITER;
-			rv_writel(period_bytes, rtd->acp3x_base +
-					mmACP_BT_TX_INTR_WATERMARK_SIZE);
+			switch (rtd->i2s_instance) {
+			case I2S_BT_INSTANCE:
+				water_val =
+					mmACP_BT_TX_INTR_WATERMARK_SIZE;
+				reg_val = mmACP_BTTDM_ITER;
+				ier_val = mmACP_BTTDM_IER;
+				break;
+			case I2S_SP_INSTANCE:
+			default:
+				water_val =
+					mmACP_I2S_TX_INTR_WATERMARK_SIZE;
+				reg_val = mmACP_I2STDM_ITER;
+				ier_val = mmACP_I2STDM_IER;
+			}
 		} else {
-			reg_val = mmACP_BTTDM_IRER;
-			rv_writel(period_bytes, rtd->acp3x_base +
-					mmACP_BT_RX_INTR_WATERMARK_SIZE);
+			switch (rtd->i2s_instance) {
+			case I2S_BT_INSTANCE:
+				water_val =
+					mmACP_BT_RX_INTR_WATERMARK_SIZE;
+				reg_val = mmACP_BTTDM_IRER;
+				ier_val = mmACP_BTTDM_IER;
+				break;
+			case I2S_SP_INSTANCE:
+			default:
+				water_val =
+					mmACP_I2S_RX_INTR_WATERMARK_SIZE;
+				reg_val = mmACP_I2STDM_IRER;
+				ier_val = mmACP_I2STDM_IER;
+			}
 		}
+		rv_writel(period_bytes, rtd->acp3x_base + water_val);
 		val = rv_readl(rtd->acp3x_base + reg_val);
 		val = val | BIT(0);
 		rv_writel(val, rtd->acp3x_base + reg_val);
-		rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER);
+		rv_writel(1, rtd->acp3x_base + ier_val);
+		ret = 0;
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-			reg_val = mmACP_BTTDM_ITER;
-		else
-			reg_val = mmACP_BTTDM_IRER;
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			switch (rtd->i2s_instance) {
+			case I2S_BT_INSTANCE:
+				reg_val = mmACP_BTTDM_ITER;
+				ier_val = mmACP_BTTDM_IER;
+				break;
+			case I2S_SP_INSTANCE:
+			default:
+				reg_val = mmACP_I2STDM_ITER;
+				ier_val = mmACP_I2STDM_IER;
+			}
 
+		} else {
+			switch (rtd->i2s_instance) {
+			case I2S_BT_INSTANCE:
+				reg_val = mmACP_BTTDM_IRER;
+				ier_val = mmACP_BTTDM_IER;
+				break;
+			case I2S_SP_INSTANCE:
+			default:
+				reg_val = mmACP_I2STDM_IRER;
+				ier_val = mmACP_I2STDM_IER;
+			}
+		}
 		val = rv_readl(rtd->acp3x_base + reg_val);
 		val = val & ~BIT(0);
 		rv_writel(val, rtd->acp3x_base + reg_val);
-		rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
+		rv_writel(0, rtd->acp3x_base + ier_val);
+		ret = 0;
 		break;
 	default:
 		ret = -EINVAL;
diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index ffd7cd1..e2051d1 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -194,20 +194,36 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
 static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
 {
 	u16 page_idx;
-	u32 low, high, val, acp_fifo_addr;
-	dma_addr_t addr = rtd->dma_addr;
+	uint64_t low, high, val, acp_fifo_addr;
+	uint64_t reg_ringbuf_size, reg_dma_size, reg_fifo_size, reg_fifo_addr;
+	dma_addr_t addr;
 
-	/* 8 scratch registers used to map one 64 bit address */
-	if (direction == SNDRV_PCM_STREAM_PLAYBACK)
-		val = 0;
-	else
-		val = rtd->num_pages * 8;
+	addr = rtd->dma_addr;
 
+	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			val = ACP_SRAM_BT_PB_PTE_OFFSET;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			val = ACP_SRAM_SP_PB_PTE_OFFSET;
+		}
+	} else {
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			val = ACP_SRAM_BT_CP_PTE_OFFSET;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			val = ACP_SRAM_SP_CP_PTE_OFFSET;
+		}
+	}
 	/* Group Enable */
 	rv_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp3x_base +
-		  mmACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
+			mmACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
 	rv_writel(PAGE_SIZE_4K_ENABLE, rtd->acp3x_base +
-		  mmACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
+			mmACPAXI2AXI_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 */
@@ -224,38 +240,61 @@ static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
 	}
 
 	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
-		/* Config ringbuffer */
-		rv_writel(MEM_WINDOW_START, rtd->acp3x_base +
-			  mmACP_BT_TX_RINGBUFADDR);
-		rv_writel(MAX_BUFFER, rtd->acp3x_base +
-			  mmACP_BT_TX_RINGBUFSIZE);
-		rv_writel(DMA_SIZE, rtd->acp3x_base + mmACP_BT_TX_DMA_SIZE);
-
-		/* Config audio fifo */
-		acp_fifo_addr = ACP_SRAM_PTE_OFFSET + (rtd->num_pages * 8)
-				+ PLAYBACK_FIFO_ADDR_OFFSET;
-		rv_writel(acp_fifo_addr, rtd->acp3x_base +
-			  mmACP_BT_TX_FIFOADDR);
-		rv_writel(FIFO_SIZE, rtd->acp3x_base + mmACP_BT_TX_FIFOSIZE);
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_ringbuf_size = mmACP_BT_TX_RINGBUFSIZE;
+			reg_dma_size = mmACP_BT_TX_DMA_SIZE;
+			acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+						BT_PB_FIFO_ADDR_OFFSET;
+			reg_fifo_addr = mmACP_BT_TX_FIFOADDR;
+			reg_fifo_size = mmACP_BT_TX_FIFOSIZE;
+			rv_writel(I2S_BT_TX_MEM_WINDOW_START,
+				rtd->acp3x_base + mmACP_BT_TX_RINGBUFADDR);
+			break;
+
+		case I2S_SP_INSTANCE:
+		default:
+			reg_ringbuf_size = mmACP_I2S_TX_RINGBUFSIZE;
+			reg_dma_size = mmACP_I2S_TX_DMA_SIZE;
+			acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+						SP_PB_FIFO_ADDR_OFFSET;
+			reg_fifo_addr =	mmACP_I2S_TX_FIFOADDR;
+			reg_fifo_size = mmACP_I2S_TX_FIFOSIZE;
+			rv_writel(I2S_SP_TX_MEM_WINDOW_START,
+				rtd->acp3x_base + mmACP_I2S_TX_RINGBUFADDR);
+		}
 	} else {
-		/* Config ringbuffer */
-		rv_writel(MEM_WINDOW_START + MAX_BUFFER, rtd->acp3x_base +
-			  mmACP_BT_RX_RINGBUFADDR);
-		rv_writel(MAX_BUFFER, rtd->acp3x_base +
-			  mmACP_BT_RX_RINGBUFSIZE);
-		rv_writel(DMA_SIZE, rtd->acp3x_base + mmACP_BT_RX_DMA_SIZE);
-
-		/* Config audio fifo */
-		acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
-				(rtd->num_pages * 8) + CAPTURE_FIFO_ADDR_OFFSET;
-		rv_writel(acp_fifo_addr, rtd->acp3x_base +
-			  mmACP_BT_RX_FIFOADDR);
-		rv_writel(FIFO_SIZE, rtd->acp3x_base + mmACP_BT_RX_FIFOSIZE);
-	}
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_ringbuf_size = mmACP_BT_RX_RINGBUFSIZE;
+			reg_dma_size = mmACP_BT_RX_DMA_SIZE;
+			acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+						BT_CAPT_FIFO_ADDR_OFFSET;
+			reg_fifo_addr = mmACP_BT_RX_FIFOADDR;
+			reg_fifo_size = mmACP_BT_RX_FIFOSIZE;
+			rv_writel(I2S_BT_RX_MEM_WINDOW_START,
+				rtd->acp3x_base + mmACP_BT_RX_RINGBUFADDR);
+			break;
 
-	/* Enable  watermark/period interrupt to host */
-	rv_writel(BIT(BT_TX_THRESHOLD) | BIT(BT_RX_THRESHOLD),
-		  rtd->acp3x_base + mmACP_EXTERNAL_INTR_CNTL);
+		case I2S_SP_INSTANCE:
+		default:
+			reg_ringbuf_size = mmACP_I2S_RX_RINGBUFSIZE;
+			reg_dma_size = mmACP_I2S_RX_DMA_SIZE;
+			acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+						SP_CAPT_FIFO_ADDR_OFFSET;
+			reg_fifo_addr = mmACP_I2S_RX_FIFOADDR;
+			reg_fifo_size = mmACP_I2S_RX_FIFOSIZE;
+			rv_writel(I2S_SP_RX_MEM_WINDOW_START,
+				rtd->acp3x_base + mmACP_I2S_RX_RINGBUFADDR);
+		}
+	}
+	rv_writel(MAX_BUFFER, rtd->acp3x_base + reg_ringbuf_size);
+	rv_writel(DMA_SIZE, rtd->acp3x_base + reg_dma_size);
+	rv_writel(acp_fifo_addr, rtd->acp3x_base + reg_fifo_addr);
+	rv_writel(FIFO_SIZE, rtd->acp3x_base + reg_fifo_size);
+	rv_writel(BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
+		| BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD),
+		rtd->acp3x_base + mmACP_EXTERNAL_INTR_CNTL);
 }
 
 static int acp3x_dma_open(struct snd_soc_component *component,
@@ -289,17 +328,21 @@ static int acp3x_dma_open(struct snd_soc_component *component,
 		return ret;
 	}
 
-	if (!adata->play_stream && !adata->capture_stream)
+	if (!adata->play_stream && !adata->capture_stream &&
+		adata->i2ssp_play_stream && !adata->i2ssp_capture_stream)
 		rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		adata->play_stream = substream;
-	else
+		adata->i2ssp_play_stream = substream;
+	} else {
 		adata->capture_stream = substream;
+		adata->i2ssp_capture_stream = substream;
+	}
 
 	i2s_data->acp3x_base = adata->acp3x_base;
 	runtime->private_data = i2s_data;
-	return 0;
+	return ret;
 }
 
 
@@ -307,16 +350,28 @@ static int acp3x_dma_hw_params(struct snd_soc_component *component,
 			       struct snd_pcm_substream *substream,
 			       struct snd_pcm_hw_params *params)
 {
-	struct snd_pcm_runtime *runtime;
 	struct i2s_stream_instance *rtd;
+	struct snd_soc_pcm_runtime *prtd;
+	struct snd_soc_card *card;
+	struct acp3x_platform_info *pinfo;
 	int status;
 	u64 size;
 
-	runtime = substream->runtime;
-	rtd = substream->private_data;
+	prtd = substream->private_data;
+	card = prtd->card;
+	pinfo = snd_soc_card_get_drvdata(card);
+	rtd = substream->runtime->private_data;
 	if (!rtd)
 		return -EINVAL;
 
+	if (pinfo) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rtd->i2s_instance = pinfo->play_i2s_instance;
+		else
+			rtd->i2s_instance = pinfo->cap_i2s_instance;
+	} else
+		pr_err("pinfo failed\n");
+
 	size = params_buffer_bytes(params);
 	status = snd_pcm_lib_malloc_pages(substream, size);
 	if (status < 0)
@@ -337,12 +392,25 @@ static int acp3x_dma_hw_params(struct snd_soc_component *component,
 static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
 					   struct snd_pcm_substream *substream)
 {
+	struct snd_soc_pcm_runtime *prtd;
+	struct snd_soc_card *card;
+	struct acp3x_platform_info *pinfo;
 	struct i2s_stream_instance *rtd;
 	u32 pos;
 	u32 buffersize;
 	u64 bytescount;
 
+	prtd = substream->private_data;
+	card = prtd->card;
 	rtd = substream->runtime->private_data;
+	pinfo = snd_soc_card_get_drvdata(card);
+	if (pinfo) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rtd->i2s_instance = pinfo->play_i2s_instance;
+		else
+			rtd->i2s_instance = pinfo->cap_i2s_instance;
+	}
+
 	buffersize = frames_to_bytes(substream->runtime,
 				     substream->runtime->buffer_size);
 	bytescount = acp_get_byte_count(rtd, substream->stream);
@@ -387,15 +455,19 @@ static int acp3x_dma_close(struct snd_soc_component *component,
 	component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
 	adata = dev_get_drvdata(component->dev);
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		adata->play_stream = NULL;
-	else
+		adata->i2ssp_play_stream = NULL;
+	} else {
 		adata->capture_stream = NULL;
+		adata->i2ssp_capture_stream = NULL;
+	}
 
 	/* Disable ACP irq, when the current stream is being closed and
 	 * another stream is also not active.
 	 */
-	if (!adata->play_stream && !adata->capture_stream)
+	if (!adata->play_stream && !adata->capture_stream &&
+		!adata->i2ssp_play_stream && !adata->i2ssp_capture_stream)
 		rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
 	return 0;
 }
@@ -527,13 +599,16 @@ static int acp3x_resume(struct device *dev)
 			adata->play_stream->runtime->private_data;
 		config_acp3x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
 		rv_writel((rtd->xfer_resolution  << 3),
-			  rtd->acp3x_base + mmACP_BTTDM_ITER);
+				rtd->acp3x_base + mmACP_BTTDM_ITER);
+		val = rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER);
+		val = val | (rtd->xfer_resolution  << 3);
+		rv_writel(val, rtd->acp3x_base + mmACP_I2STDM_ITER);
 		if (adata->tdm_mode == true) {
 			rv_writel(adata->tdm_fmt, adata->acp3x_base +
-				  mmACP_BTTDM_TXFRMT);
+					mmACP_BTTDM_TXFRMT);
 			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
 			rv_writel((val | 0x2), adata->acp3x_base +
-				  mmACP_BTTDM_ITER);
+					mmACP_BTTDM_ITER);
 		}
 	}
 
@@ -542,13 +617,17 @@ static int acp3x_resume(struct device *dev)
 			adata->capture_stream->runtime->private_data;
 		config_acp3x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
 		rv_writel((rtd->xfer_resolution  << 3),
-			  rtd->acp3x_base + mmACP_BTTDM_IRER);
+				rtd->acp3x_base + mmACP_BTTDM_IRER);
+		val = rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER);
+		val = val | (rtd->xfer_resolution  << 3);
+		rv_writel(val, rtd->acp3x_base + mmACP_I2STDM_ITER);
+
 		if (adata->tdm_mode == true) {
 			rv_writel(adata->tdm_fmt, adata->acp3x_base +
-				  mmACP_BTTDM_RXFRMT);
+					mmACP_BTTDM_RXFRMT);
 			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
 			rv_writel((val | 0x2), adata->acp3x_base +
-				  mmACP_BTTDM_IRER);
+					mmACP_BTTDM_IRER);
 		}
 	}
 
@@ -561,8 +640,8 @@ static int acp3x_pcm_runtime_suspend(struct device *dev)
 {
 	struct i2s_dev_data *adata;
 	int status;
-	adata = dev_get_drvdata(dev);
 
+	adata = dev_get_drvdata(dev);
 	status = acp3x_deinit(adata->acp3x_base);
 	if (status)
 		dev_err(dev, "ACP de-init failed\n");
@@ -578,8 +657,8 @@ static int acp3x_pcm_runtime_resume(struct device *dev)
 {
 	struct i2s_dev_data *adata;
 	int status;
-	adata = dev_get_drvdata(dev);
 
+	adata = dev_get_drvdata(dev);
 	status = acp3x_init(adata->acp3x_base);
 	if (status)
 		return -ENODEV;
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index 72c1a23..c071477 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -7,6 +7,9 @@
 
 #include "chip_offset_byte.h"
 
+#define I2S_SP_INSTANCE                 0x01
+#define I2S_BT_INSTANCE                 0x02
+
 #define ACP3x_DEVS		3
 #define ACP3x_PHY_BASE_ADDRESS 0x1240000
 #define	ACP3x_I2S_MODE	0
@@ -17,8 +20,11 @@
 #define ACP3x_BT_TDM_REG_START	0x1242800
 #define ACP3x_BT_TDM_REG_END	0x1242810
 #define I2S_MODE	0x04
+#define	I2S_RX_THRESHOLD	27
+#define	I2S_TX_THRESHOLD	28
 #define	BT_TX_THRESHOLD 26
 #define	BT_RX_THRESHOLD 25
+#define ACP_ERR_INTR_MASK	29
 #define ACP3x_POWER_ON 0x00
 #define ACP3x_POWER_ON_IN_PROGRESS 0x01
 #define ACP3x_POWER_OFF 0x02
@@ -26,19 +32,28 @@
 #define ACP3x_SOFT_RESET__SoftResetAudDone_MASK	0x00010001
 
 #define ACP_SRAM_PTE_OFFSET	0x02050000
+#define ACP_SRAM_SP_PB_PTE_OFFSET	0x0
+#define ACP_SRAM_SP_CP_PTE_OFFSET	0x100
+#define ACP_SRAM_BT_PB_PTE_OFFSET	0x200
+#define ACP_SRAM_BT_CP_PTE_OFFSET	0x300
 #define PAGE_SIZE_4K_ENABLE 0x2
-#define MEM_WINDOW_START	0x4000000
-#define PLAYBACK_FIFO_ADDR_OFFSET 0x400
-#define CAPTURE_FIFO_ADDR_OFFSET  0x500
+#define I2S_SP_TX_MEM_WINDOW_START	0x4000000
+#define I2S_SP_RX_MEM_WINDOW_START	0x4020000
+#define I2S_BT_TX_MEM_WINDOW_START	0x4040000
+#define I2S_BT_RX_MEM_WINDOW_START	0x4060000
 
+#define SP_PB_FIFO_ADDR_OFFSET		0x500
+#define SP_CAPT_FIFO_ADDR_OFFSET	0x700
+#define BT_PB_FIFO_ADDR_OFFSET		0x900
+#define BT_CAPT_FIFO_ADDR_OFFSET	0xB00
 #define PLAYBACK_MIN_NUM_PERIODS    2
 #define PLAYBACK_MAX_NUM_PERIODS    8
-#define PLAYBACK_MAX_PERIOD_SIZE    16384
-#define PLAYBACK_MIN_PERIOD_SIZE    4096
+#define PLAYBACK_MAX_PERIOD_SIZE    8192
+#define PLAYBACK_MIN_PERIOD_SIZE    1024
 #define CAPTURE_MIN_NUM_PERIODS     2
 #define CAPTURE_MAX_NUM_PERIODS     8
-#define CAPTURE_MAX_PERIOD_SIZE     16384
-#define CAPTURE_MIN_PERIOD_SIZE     4096
+#define CAPTURE_MAX_PERIOD_SIZE     8192
+#define CAPTURE_MIN_PERIOD_SIZE     1024
 
 #define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
 #define MIN_BUFFER MAX_BUFFER
@@ -64,14 +79,20 @@ struct i2s_dev_data {
 	void __iomem *acp3x_base;
 	struct snd_pcm_substream *play_stream;
 	struct snd_pcm_substream *capture_stream;
+	struct snd_pcm_substream *i2ssp_play_stream;
+	struct snd_pcm_substream *i2ssp_capture_stream;
 };
 
 struct i2s_stream_instance {
 	u16 num_pages;
+	u16 i2s_instance;
+	u16 capture_channel;
+	u16 direction;
 	u16 channels;
 	u32 xfer_resolution;
-	u64 bytescount;
+	u32 val;
 	dma_addr_t dma_addr;
+	u64 bytescount;
 	void __iomem *acp3x_base;
 };
 
@@ -91,15 +112,36 @@ static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd,
 	u64 byte_count;
 
 	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
-		byte_count = rv_readl(rtd->acp3x_base +
-				mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH);
-		byte_count |= rv_readl(rtd->acp3x_base +
-				mmACP_BT_TX_LINEARPOSITIONCNTR_LOW);
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			byte_count = rv_readl(rtd->acp3x_base +
+					mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH);
+			byte_count |= rv_readl(rtd->acp3x_base +
+					mmACP_BT_TX_LINEARPOSITIONCNTR_LOW);
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			byte_count = rv_readl(rtd->acp3x_base +
+					mmACP_I2S_TX_LINEARPOSITIONCNTR_HIGH);
+			byte_count |= rv_readl(rtd->acp3x_base +
+					mmACP_I2S_TX_LINEARPOSITIONCNTR_LOW);
+		}
+
 	} else {
-		byte_count = rv_readl(rtd->acp3x_base +
-				mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH);
-		byte_count |= rv_readl(rtd->acp3x_base +
-				mmACP_BT_RX_LINEARPOSITIONCNTR_LOW);
+		switch (rtd->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			byte_count = rv_readl(rtd->acp3x_base +
+					mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH);
+			byte_count |= rv_readl(rtd->acp3x_base +
+					mmACP_BT_RX_LINEARPOSITIONCNTR_LOW);
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			byte_count = rv_readl(rtd->acp3x_base +
+					mmACP_I2S_RX_LINEARPOSITIONCNTR_HIGH);
+			byte_count |= rv_readl(rtd->acp3x_base +
+					mmACP_I2S_RX_LINEARPOSITIONCNTR_LOW);
+		}
 	}
 	return byte_count;
 }
-- 
2.7.4

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[alsa-devel] [PATCH v6 4/6] ASoC: amd: add ACP3x TDM mode support

[Ravulapati Vishnu vardhan rao]

ACP3x I2S (CPU DAI) can act in normal I2S and TDM modes. Added support
for TDM mode. Desired mode can be selected from ASoC machine driver.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/acp3x-i2s.c | 42 +++++++++++++++++++++++++++++++----------
 sound/soc/amd/raven/acp3x.h     |  2 ++
 2 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 247b9f5..5cb4ef7 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -43,8 +43,8 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
 		u32 rx_mask, int slots, int slot_width)
 {
 	struct i2s_dev_data *adata;
-	u32 val;
 	u16 slot_len;
+	u32 val, flen, reg_val, frmt_reg;
 
 	adata = snd_soc_dai_get_drvdata(cpu_dai);
 
@@ -67,16 +67,38 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
 		return -EINVAL;
 	}
 
-	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
-	rv_writel(val | 0x2, adata->acp3x_base + mmACP_BTTDM_ITER);
-	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
-	rv_writel(val | 0x2, adata->acp3x_base + mmACP_BTTDM_IRER);
-
-	val = FRM_LEN | (slots << 15) | (slot_len << 18);
-	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
-	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
+	/* Enable I2S / BT channels TDM and respective
+	 * I2S/BT`s TX/RX Formats frame lengths.
+	 */
+	flen = FRM_LEN | (slots << 15) | (slot_len << 18);
 
-	adata->tdm_fmt = val;
+	if (adata->substream_type == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (adata->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_ITER;
+			frmt_reg = mmACP_BTTDM_TXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_ITER;
+			frmt_reg = mmACP_I2STDM_TXFRMT;
+		}
+	} else {
+		switch (adata->i2s_instance) {
+		case I2S_BT_INSTANCE:
+			reg_val = mmACP_BTTDM_IRER;
+			frmt_reg = mmACP_BTTDM_RXFRMT;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			reg_val = mmACP_I2STDM_IRER;
+			frmt_reg = mmACP_I2STDM_RXFRMT;
+		}
+	}
+	val = rv_readl(adata->acp3x_base + reg_val);
+	rv_writel(val | 0x2, adata->acp3x_base + reg_val);
+	rv_writel(flen,	adata->acp3x_base + frmt_reg);
+	adata->tdm_fmt = flen;
 	return 0;
 }
 
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index c071477..01b283a 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -76,6 +76,8 @@ struct i2s_dev_data {
 	bool tdm_mode;
 	unsigned int i2s_irq;
 	u32 tdm_fmt;
+	u16 i2s_instance;
+	u32 substream_type;
 	void __iomem *acp3x_base;
 	struct snd_pcm_substream *play_stream;
 	struct snd_pcm_substream *capture_stream;
-- 
2.7.4

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[alsa-devel] [PATCH v6 5/6] ASoC: amd: Handle ACP3x I2S-SP Interrupts.

[Ravulapati Vishnu vardhan rao]

Enabled support for I2S-SP interrupt handling.
Previous to this implementation, driver supports only interrupts
on BT instance.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/acp3x-pcm-dma.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index e2051d1..51ff1c0 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -177,6 +177,13 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
 		snd_pcm_period_elapsed(rv_i2s_data->play_stream);
 		play_flag = 1;
 	}
+	if ((val & BIT(I2S_TX_THRESHOLD)) &&
+				rv_i2s_data->i2ssp_play_stream) {
+		rv_writel(BIT(I2S_TX_THRESHOLD),
+			rv_i2s_data->acp3x_base	+ mmACP_EXTERNAL_INTR_STAT);
+		snd_pcm_period_elapsed(rv_i2s_data->i2ssp_play_stream);
+		play_flag = 1;
+	}
 
 	if ((val & BIT(BT_RX_THRESHOLD)) && rv_i2s_data->capture_stream) {
 		rv_writel(BIT(BT_RX_THRESHOLD), rv_i2s_data->acp3x_base +
@@ -184,6 +191,13 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
 		snd_pcm_period_elapsed(rv_i2s_data->capture_stream);
 		cap_flag = 1;
 	}
+	if ((val & BIT(I2S_RX_THRESHOLD)) &&
+				rv_i2s_data->i2ssp_capture_stream) {
+		rv_writel(BIT(I2S_RX_THRESHOLD),
+			 rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
+		snd_pcm_period_elapsed(rv_i2s_data->i2ssp_capture_stream);
+		cap_flag = 1;
+	}
 
 	if (play_flag | cap_flag)
 		return IRQ_HANDLED;
-- 
2.7.4

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[alsa-devel] [PATCH v6 6/6] ASoC: amd: Added ACP3x system resume and runtime pm

[Ravulapati Vishnu vardhan rao]

When system wide suspend happens, ACP will be powered off
and when system resumes,for audio usecase to continue,all
the runtime configuration data needs to be programmed again.
Added resume pm call back to ACP pm ops and also added runtime
PM operations for ACP3x PCM platform device.
Device will enter into D3 state when there is no activity
on audio I2S lines.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
---
 sound/soc/amd/raven/acp3x-pcm-dma.c | 136 +------------------------
 sound/soc/amd/raven/acp3x.h         |   7 ++
 sound/soc/amd/raven/pci-acp3x.c     | 195 +++++++++++++++++++++++++++++++++++-
 3 files changed, 200 insertions(+), 138 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index 51ff1c0..49279911 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -58,106 +58,6 @@ static const struct snd_pcm_hardware acp3x_pcm_hardware_capture = {
 	.periods_max = CAPTURE_MAX_NUM_PERIODS,
 };
 
-static int acp3x_power_on(void __iomem *acp3x_base, bool on)
-{
-	u16 val, mask;
-	u32 timeout;
-
-	if (on == true) {
-		val = 1;
-		mask = ACP3x_POWER_ON;
-	} else {
-		val = 0;
-		mask = ACP3x_POWER_OFF;
-	}
-
-	rv_writel(val, acp3x_base + mmACP_PGFSM_CONTROL);
-	timeout = 0;
-	while (true) {
-		val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
-		if ((val & ACP3x_POWER_OFF_IN_PROGRESS) == mask)
-			break;
-		if (timeout > 100) {
-			pr_err("ACP3x power state change failure\n");
-			return -ENODEV;
-		}
-		timeout++;
-		cpu_relax();
-	}
-	return 0;
-}
-
-static int acp3x_reset(void __iomem *acp3x_base)
-{
-	u32 val, timeout;
-
-	rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
-	timeout = 0;
-	while (true) {
-		val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
-		if ((val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) ||
-		     timeout > 100) {
-			if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
-				break;
-			return -ENODEV;
-		}
-		timeout++;
-		cpu_relax();
-	}
-
-	rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
-	timeout = 0;
-	while (true) {
-		val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
-		if (!val || timeout > 100) {
-			if (!val)
-				break;
-			return -ENODEV;
-		}
-		timeout++;
-		cpu_relax();
-	}
-	return 0;
-}
-
-static int acp3x_init(void __iomem *acp3x_base)
-{
-	int ret;
-
-	/* power on */
-	ret = acp3x_power_on(acp3x_base, true);
-	if (ret) {
-		pr_err("ACP3x power on failed\n");
-		return ret;
-	}
-	/* Reset */
-	ret = acp3x_reset(acp3x_base);
-	if (ret) {
-		pr_err("ACP3x reset failed\n");
-		return ret;
-	}
-	return 0;
-}
-
-static int acp3x_deinit(void __iomem *acp3x_base)
-{
-	int ret;
-
-	/* Reset */
-	ret = acp3x_reset(acp3x_base);
-	if (ret) {
-		pr_err("ACP3x reset failed\n");
-		return ret;
-	}
-	/* power off */
-	ret = acp3x_power_on(acp3x_base, false);
-	if (ret) {
-		pr_err("ACP3x power off failed\n");
-		return ret;
-	}
-	return 0;
-}
-
 static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
 {
 	struct i2s_dev_data *rv_i2s_data;
@@ -536,12 +436,6 @@ static int acp3x_audio_probe(struct platform_device *pdev)
 	adata->i2s_irq = res->start;
 
 	dev_set_drvdata(&pdev->dev, adata);
-	/* Initialize ACP */
-	status = acp3x_init(adata->acp3x_base);
-	if (status) {
-		ret = -ENODEV;
-		goto io_irq;
-	}
 	status = devm_snd_soc_register_component(&pdev->dev,
 						 &acp3x_i2s_component,
 						 NULL, 0);
@@ -566,11 +460,6 @@ static int acp3x_audio_probe(struct platform_device *pdev)
 dev_err:
 	iounmap(adata->acp3x_base);
 	kfree(adata);
-	status = acp3x_deinit(adata->acp3x_base);
-	if (status)
-		dev_err(&pdev->dev, "ACP de-init failed\n");
-	else
-		dev_info(&pdev->dev, "ACP de-initialized\n");
 	return ret;
 io_irq:
 	iounmap(adata->acp3x_base);
@@ -583,16 +472,6 @@ static int acp3x_audio_probe(struct platform_device *pdev)
 
 static int acp3x_audio_remove(struct platform_device *pdev)
 {
-	struct i2s_dev_data *adata;
-	int ret;
-
-	adata = dev_get_drvdata(&pdev->dev);
-	ret = acp3x_deinit(adata->acp3x_base);
-	if (ret)
-		dev_err(&pdev->dev, "ACP de-init failed\n");
-	else
-		dev_info(&pdev->dev, "ACP de-initialized\n");
-
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }
@@ -600,13 +479,9 @@ static int acp3x_audio_remove(struct platform_device *pdev)
 static int acp3x_resume(struct device *dev)
 {
 	struct i2s_dev_data *adata;
-	int status;
 	u32 val;
 
 	adata = dev_get_drvdata(dev);
-	status = acp3x_init(adata->acp3x_base);
-	if (status)
-		return -ENODEV;
 
 	if (adata->play_stream && adata->play_stream->runtime) {
 		struct i2s_stream_instance *rtd =
@@ -653,14 +528,8 @@ static int acp3x_resume(struct device *dev)
 static int acp3x_pcm_runtime_suspend(struct device *dev)
 {
 	struct i2s_dev_data *adata;
-	int status;
 
 	adata = dev_get_drvdata(dev);
-	status = acp3x_deinit(adata->acp3x_base);
-	if (status)
-		dev_err(dev, "ACP de-init failed\n");
-	else
-		dev_info(dev, "ACP de-initialized\n");
 
 	rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
 
@@ -670,12 +539,9 @@ static int acp3x_pcm_runtime_suspend(struct device *dev)
 static int acp3x_pcm_runtime_resume(struct device *dev)
 {
 	struct i2s_dev_data *adata;
-	int status;
 
 	adata = dev_get_drvdata(dev);
-	status = acp3x_init(adata->acp3x_base);
-	if (status)
-		return -ENODEV;
+
 	rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
 	return 0;
 }
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index 01b283a..cf16ceb 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -65,6 +65,13 @@
 #define SLOT_WIDTH_16 0x10
 #define SLOT_WIDTH_24 0x18
 #define SLOT_WIDTH_32 0x20
+#define ACP_PGFSM_CNTL_POWER_ON_MASK	0x01
+#define ACP_PGFSM_CNTL_POWER_OFF_MASK	0x00
+#define ACP_PGFSM_STATUS_MASK		0x03
+#define ACP_POWERED_ON			0x00
+#define ACP_POWER_ON_IN_PROGRESS	0x01
+#define ACP_POWERED_OFF			0x02
+#define ACP_POWER_OFF_IN_PROGRESS	0x03
 
 struct acp3x_platform_info {
 	u16 play_i2s_instance;
diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c
index 4c4601d..d1dc7ba 100644
--- a/sound/soc/amd/raven/pci-acp3x.c
+++ b/sound/soc/amd/raven/pci-acp3x.c
@@ -9,6 +9,9 @@
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
+#include <sound/pcm.h>
 
 #include "acp3x.h"
 
@@ -19,6 +22,120 @@ struct acp3x_dev_data {
 	struct platform_device *pdev[ACP3x_DEVS];
 };
 
+static int acp3x_power_on(void __iomem *acp3x_base)
+{
+	u32 val;
+	u32 timeout;
+
+	timeout = 0;
+	val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
+
+	if (val == 0)
+		return val;
+
+	if (!((val & ACP_PGFSM_STATUS_MASK) ==
+				ACP_POWER_ON_IN_PROGRESS))
+		rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
+			acp3x_base + mmACP_PGFSM_CONTROL);
+	while (++timeout) {
+		val  = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
+		if (!val)
+			break;
+		udelay(1);
+		if (timeout > 500) {
+			pr_err("ACP is Not Powered ON\n");
+			return -ETIMEDOUT;
+		}
+	}
+	return 0;
+}
+static int acp3x_power_off(void __iomem *acp3x_base)
+{
+	u32 val;
+	u32 timeout, ret;
+
+	timeout = 0;
+	rv_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK,
+			acp3x_base + mmACP_PGFSM_CONTROL);
+	while (++timeout) {
+		val  = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
+		if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) {
+			ret = 0;
+			break;
+		}
+		udelay(1);
+		if (timeout > 500) {
+			pr_err("ACP is Not Powered OFF\n");
+			ret = -ETIMEDOUT;
+			break;
+		}
+	}
+	return ret;
+}
+static int acp3x_reset(void __iomem *acp3x_base)
+{
+	u32 val, timeout;
+
+	rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout) {
+		val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
+		if ((val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) ||
+							timeout > 100) {
+			if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
+				break;
+			return -ENODEV;
+		}
+		cpu_relax();
+	}
+	rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout) {
+		val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
+		if (!val)
+			break;
+		if (timeout > 100)
+			return -ENODEV;
+		cpu_relax();
+	}
+	return 0;
+}
+static int acp3x_init(void __iomem *acp3x_base)
+{
+	int ret;
+
+	/* power on */
+	ret = acp3x_power_on(acp3x_base);
+	if (ret) {
+		pr_err("ACP3x power on failed\n");
+		return ret;
+	}
+	/* Reset */
+	ret = acp3x_reset(acp3x_base);
+	if (ret) {
+		pr_err("ACP3x reset failed\n");
+		return ret;
+	}
+	return 0;
+}
+static int acp3x_deinit(void __iomem *acp3x_base)
+{
+	int ret;
+
+	/* Reset */
+	ret = acp3x_reset(acp3x_base);
+	if (ret) {
+		pr_err("ACP3x reset failed\n");
+		return ret;
+	}
+	/* power off */
+	ret = acp3x_power_off(acp3x_base);
+	if (ret) {
+		pr_err("ACP3x power off failed\n");
+		return ret;
+	}
+	return 0;
+}
 static int snd_acp3x_probe(struct pci_dev *pci,
 			   const struct pci_device_id *pci_id)
 {
@@ -63,6 +180,9 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 	}
 	pci_set_master(pci);
 	pci_set_drvdata(pci, adata);
+	ret = acp3x_init(adata->acp3x_base);
+	if (ret)
+		goto release_init;
 
 	val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
 	switch (val) {
@@ -72,7 +192,7 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 					  GFP_KERNEL);
 		if (!adata->res) {
 			ret = -ENOMEM;
-			goto release_regions;
+			goto release_resource;
 		}
 
 		adata->res[0].name = "acp3x_i2s_iomem";
@@ -133,9 +253,19 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 		ret = -ENODEV;
 		goto unmap_mmio;
 	}
+	pm_runtime_set_autosuspend_delay(&pci->dev, 5000);
+	pm_runtime_use_autosuspend(&pci->dev);
+	pm_runtime_set_active(&pci->dev);
+	pm_runtime_put_noidle(&pci->dev);
+	pm_runtime_enable(&pci->dev);
 	return 0;
 
 unmap_mmio:
+	ret = acp3x_deinit(adata->acp3x_base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
+	else
+		dev_dbg(&pci->dev, "ACP de-initialized\n");
 	for (i = 0 ; i < ACP3x_DEVS ; i++)
 		platform_device_unregister(adata->pdev[i]);
 	iounmap(adata->acp3x_base);
@@ -144,6 +274,23 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 	pci_disable_msi(pci);
 	pci_release_regions(pci);
 	pci_disable_device(pci);
+release_resource:
+	ret = acp3x_deinit(adata->acp3x_base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
+	else
+		dev_dbg(&pci->dev, "ACP de-initialized\n");
+	iounmap(adata->acp3x_base);
+	kfree(adata);
+	pci_disable_msi(pci);
+	pci_release_regions(pci);
+	pci_disable_device(pci);
+release_init:
+	iounmap(adata->acp3x_base);
+	kfree(adata);
+	pci_disable_msi(pci);
+	pci_release_regions(pci);
+	pci_disable_device(pci);
 release_regions:
 	kfree(adata);
 	pci_disable_msi(pci);
@@ -157,17 +304,56 @@ static int snd_acp3x_probe(struct pci_dev *pci,
 
 	return ret;
 }
+static int  snd_acp3x_suspend(struct device *dev)
+{
+	int status;
+	struct acp3x_dev_data *adata;
+
+	adata = dev_get_drvdata(dev);
+	status = acp3x_deinit(adata->acp3x_base);
+	if (status)
+		dev_err(dev, "ACP de-init failed\n");
+	else
+		dev_dbg(dev, "ACP de-initialized\n");
+
+	return 0;
+}
+static int  snd_acp3x_resume(struct device *dev)
+{
+	int status;
+	struct acp3x_dev_data *adata;
 
+	adata = dev_get_drvdata(dev);
+	status = acp3x_init(adata->acp3x_base);
+	if (status) {
+		dev_err(dev, "ACP init failed\n");
+		return status;
+	}
+	return 0;
+}
+static const struct dev_pm_ops acp3x_pm = {
+	.runtime_suspend = snd_acp3x_suspend,
+	.runtime_resume =  snd_acp3x_resume,
+	.resume =       snd_acp3x_resume,
+};
 static void snd_acp3x_remove(struct pci_dev *pci)
 {
-	struct acp3x_dev_data *adata = pci_get_drvdata(pci);
-	int i;
+	struct acp3x_dev_data *adata;
+	int i, ret;
 
+	adata = pci_get_drvdata(pci);
 	if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) {
 		for (i = 0 ; i <  ACP3x_DEVS ; i++)
 			platform_device_unregister(adata->pdev[i]);
 	}
+	ret = acp3x_deinit(adata->acp3x_base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
+	else
+		dev_dbg(&pci->dev, "ACP de-initialized\n");
 	iounmap(adata->acp3x_base);
+	pm_runtime_disable(&pci->dev);
+	pm_runtime_get_noresume(&pci->dev);
 	pci_disable_msi(pci);
 	pci_release_regions(pci);
 	pci_disable_device(pci);
@@ -186,6 +372,9 @@ static struct pci_driver acp3x_driver  = {
 	.id_table = snd_acp3x_ids,
 	.probe = snd_acp3x_probe,
 	.remove = snd_acp3x_remove,
+	.driver = {
+		.pm = &acp3x_pm,
+	}
 };
 
 module_pci_driver(acp3x_driver);
-- 
2.7.4

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