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Unverified Commit c21c834a authored by Akshu Agrawal's avatar Akshu Agrawal Committed by Mark Brown
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ASoC: AMD: Set delay value for the capture case 



ACP->SYSMEM DMA happens at every I2S->SYSMEM period
completion. Thus, there is delay of x frames till
I2S->SYSMEM reaches a period length. This delay is
communicated to user space.

Signed-off-by: default avatarAkshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 662fb3ef

sound/soc/amd/acp-pcm-dma.c

+14 −1
Original line number Diff line number Diff line
@@ -922,6 +922,10 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream, 
			rtd->destination = FROM_BLUETOOTH;

			rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH10;

			rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH11;

			rtd->byte_cnt_high_reg_offset =

					mmACP_I2S_BT_RECEIVE_BYTE_CNT_HIGH;

			rtd->byte_cnt_low_reg_offset =

					mmACP_I2S_BT_RECEIVE_BYTE_CNT_LOW;

			rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_11;

			adata->capture_i2sbt_stream = substream;

			break;
@@ -942,6 +946,10 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream, 
			rtd->destination = FROM_ACP_I2S_1;

			rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH14;

			rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH15;

			rtd->byte_cnt_high_reg_offset =

					mmACP_I2S_RECEIVED_BYTE_CNT_HIGH;

			rtd->byte_cnt_low_reg_offset =

					mmACP_I2S_RECEIVED_BYTE_CNT_LOW;

			rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_15;

			adata->capture_i2ssp_stream = substream;

		}
@@ -997,7 +1005,7 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) 
	u32 pos = 0;

	u64 bytescount = 0;

	u16 dscr;

	u32 period_bytes;

	u32 period_bytes, delay;



	struct snd_pcm_runtime *runtime = substream->runtime;

	struct audio_substream_data *rtd = runtime->private_data;
@@ -1012,6 +1020,11 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) 
			pos = period_bytes;

		else

			pos = 0;

		bytescount = acp_get_byte_count(rtd);

		if (bytescount > rtd->bytescount)

			bytescount -= rtd->bytescount;

		delay = do_div(bytescount, period_bytes);

		runtime->delay = bytes_to_frames(runtime, delay);

	} else {

		buffersize = frames_to_bytes(runtime, runtime->buffer_size);

		bytescount = acp_get_byte_count(rtd);