Unverified Commit 662fb3ef authored by Mukunda, Vijendar's avatar Mukunda, Vijendar Committed by Mark Brown
Browse files

ASoC: AMD: Modified DMA pointer for capture 



Give position on ACP->SYSMEM DMA channel for
the number of bytes that have been transferred on
the basis of current descriptor under service.

Signed-off-by: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: default avatarAkshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bbdb7012

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

+18 −13
Original line number Diff line number Diff line
@@ -922,10 +922,7 @@ 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;

		case I2S_SP_INSTANCE:
@@ -945,10 +942,7 @@ 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;

		}

	}
@@ -1002,6 +996,8 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) 
	u32 buffersize;

	u32 pos = 0;

	u64 bytescount = 0;

	u16 dscr;

	u32 period_bytes;



	struct snd_pcm_runtime *runtime = substream->runtime;

	struct audio_substream_data *rtd = runtime->private_data;
@@ -1009,11 +1005,20 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) 
	if (!rtd)

		return -EINVAL;



	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {

		period_bytes = frames_to_bytes(runtime, runtime->period_size);

		dscr = acp_reg_read(rtd->acp_mmio, rtd->dma_curr_dscr);

		if (dscr == rtd->dma_dscr_idx_1)

			pos = period_bytes;

		else

			pos = 0;

	} else {

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

		bytescount = acp_get_byte_count(rtd);



		if (bytescount > rtd->bytescount)

			bytescount -= rtd->bytescount;

		pos = do_div(bytescount, buffersize);

	}

	return bytes_to_frames(runtime, pos);

}

sound/soc/amd/acp.h

+1 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ struct audio_substream_data { 
	u32 sram_bank;

	u32 byte_cnt_high_reg_offset;

	u32 byte_cnt_low_reg_offset;

	u32 dma_curr_dscr;

	uint64_t size;

	u64 bytescount;

	void __iomem *acp_mmio;

CRA Git | Maintained and supported by SUSTech CRA and CCSE