Re: [alsa-devel] [PATCH v12 3/6] ASoC: amd: Enabling I2S instance in DMA and DAI

["Agrawal, Akshu" <aagrawal2@amd.com>]

On 11/22/2019 3:14 PM, Ravulapati Vishnu vardhan rao wrote:
> 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 enables 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     | 123 +++++++++++++++++----
>   sound/soc/amd/raven/acp3x-pcm-dma.c | 214 ++++++++++++++++++++++++------------
>   sound/soc/amd/raven/acp3x.h         |  77 ++++++++++---
>   3 files changed, 309 insertions(+), 105 deletions(-)
>
> diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
> index cdc1c61..7f05782 100644
> --- a/sound/soc/amd/raven/acp3x-i2s.c
> +++ b/sound/soc/amd/raven/acp3x-i2s.c
> @@ -28,10 +28,10 @@ static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
>   	mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
>   	switch (mode) {
>   	case SND_SOC_DAIFMT_I2S:
> -		adata->tdm_mode = false;
> +		adata->tdm_mode = TDM_DISABLE;
>   		break;
>   	case SND_SOC_DAIFMT_DSP_A:
> -		adata->tdm_mode = true;
> +		adata->tdm_mode = TDM_ENABLE;
>   		break;
>   	default:
>   		return -EINVAL;
> @@ -87,10 +87,22 @@ 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;
> +	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;
> +	}
>   
>   	/* These values are as per Hardware Spec */
>   	switch (params_format(params)) {
> @@ -110,11 +122,25 @@ 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);
> @@ -125,10 +151,21 @@ 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) {
> @@ -138,31 +175,75 @@ 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 f8ad7ce..77f2ed5 100644
> --- a/sound/soc/amd/raven/acp3x-pcm-dma.c
> +++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
> @@ -194,15 +194,31 @@ 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;
> +	u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
> +	u32 reg_ringbuf_size, reg_dma_size, reg_fifo_size;
> +	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);
> @@ -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,
> @@ -288,17 +327,21 @@ 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;
>   }
>   
>   
> @@ -306,16 +349,28 @@ 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)
> @@ -336,12 +391,25 @@ 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);
> @@ -386,15 +454,19 @@ 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;
>   }
> @@ -503,7 +575,7 @@ static int acp3x_resume(struct device *dev)
>   {
>   	struct i2s_dev_data *adata;
>   	int status;
> -	u32 val;
> +	u32 val, reg_val, frmt_val;
>   
>   	adata = dev_get_drvdata(dev);
>   	status = acp3x_init(adata->acp3x_base);
> @@ -514,32 +586,38 @@ static int acp3x_resume(struct device *dev)
>   		struct i2s_stream_instance *rtd =
>   			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);
> -		if (adata->tdm_mode == true) {
> -			rv_writel(adata->tdm_fmt, adata->acp3x_base +
> -				  mmACP_BTTDM_TXFRMT);
> -			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
> -			rv_writel((val | 0x2), adata->acp3x_base +
> -				  mmACP_BTTDM_ITER);
> +		switch (rtd->i2s_instance) {
> +		case I2S_BT_INSTANCE:
> +			reg_val = mmACP_BTTDM_ITER;
> +			frmt_val = mmACP_BTTDM_TXFRMT;
> +			break;
> +		case I2S_SP_INSTANCE:
> +		default:
> +			reg_val = mmACP_I2STDM_ITER;
> +			frmt_val = mmACP_I2STDM_TXFRMT;
>   		}
>   	}
> -
>   	if (adata->capture_stream && adata->capture_stream->runtime) {
>   		struct i2s_stream_instance *rtd =
>   			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);
> -		if (adata->tdm_mode == true) {
> -			rv_writel(adata->tdm_fmt, adata->acp3x_base +
> -				  mmACP_BTTDM_RXFRMT);
> -			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
> -			rv_writel((val | 0x2), adata->acp3x_base +
> -				  mmACP_BTTDM_IRER);
> +		switch (rtd->i2s_instance) {
> +		case I2S_BT_INSTANCE:
> +			reg_val = mmACP_BTTDM_IRER;
> +			frmt_val = mmACP_BTTDM_RXFRMT;
> +			break;
> +		case I2S_SP_INSTANCE:
> +		default:
> +			reg_val = mmACP_I2STDM_IRER;
> +			frmt_val = mmACP_I2STDM_RXFRMT;
>   		}
>   	}
> -
> +	rv_writel((rtd->xfer_resolution  << 3), rtd->acp3x_base + reg_val);

Build error, rtd is declared in scope of 'if' condition. Move the 
deceleration to function.


Thanks,

Akshu

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