From: "Mukunda, Vijendar" Vijendar.Mukunda@amd.com
Give position on ACP->SYSMEM DMA channel for the number of bytes that have been transferred on the current descriptor under service.
Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com Signed-off-by: Akshu Agrawal akshu.agrawal@amd.com --- sound/soc/amd/acp-pcm-dma.c | 34 ++++++++++++++++++++++------------ sound/soc/amd/acp.h | 3 +++ 2 files changed, 25 insertions(+), 12 deletions(-)
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c index 816abd6..6240a77 100644 --- a/sound/soc/amd/acp-pcm-dma.c +++ b/sound/soc/amd/acp-pcm-dma.c @@ -922,10 +922,9 @@ 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; + rtd->cur_trans_cnt = mmACP_DMA_CUR_TRANS_CNT_11; + rtd->end_dma_dscr = CAPTURE_END_DMA_DESCR_CH10; adata->capture_i2sbt_stream = substream; break; case I2S_SP_INSTANCE: @@ -945,10 +944,9 @@ 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; + rtd->cur_trans_cnt = mmACP_DMA_CUR_TRANS_CNT_15; + rtd->end_dma_dscr = CAPTURE_END_DMA_DESCR_CH14; adata->capture_i2ssp_stream = substream; } } @@ -1002,6 +1000,9 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) u32 buffersize; u32 pos = 0; u64 bytescount = 0; + u32 dma_count = 0; + u16 dscr; + u32 period_bytes;
struct snd_pcm_runtime *runtime = substream->runtime; struct audio_substream_data *rtd = runtime->private_data; @@ -1010,10 +1011,19 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) return -EINVAL;
buffersize = frames_to_bytes(runtime, runtime->buffer_size); - bytescount = acp_get_byte_count(rtd); - - bytescount -= rtd->bytescount; - pos = do_div(bytescount, buffersize); + 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); + dma_count = acp_reg_read(rtd->acp_mmio, rtd->cur_trans_cnt); + if (dscr == rtd->end_dma_dscr) + dma_count += period_bytes; + pos = dma_count % buffersize; + } else { + bytescount = acp_get_byte_count(rtd); + if (bytescount > rtd->bytescount) + bytescount -= rtd->bytescount; + pos = do_div(bytescount, buffersize); + } return bytes_to_frames(runtime, pos); }
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h index 0a2240b..cf7c0b9 100644 --- a/sound/soc/amd/acp.h +++ b/sound/soc/amd/acp.h @@ -134,10 +134,13 @@ struct audio_substream_data { u16 destination; u16 dma_dscr_idx_1; u16 dma_dscr_idx_2; + u16 end_dma_dscr; u32 pte_offset; u32 sram_bank; u32 byte_cnt_high_reg_offset; u32 byte_cnt_low_reg_offset; + u32 dma_curr_dscr; + u32 cur_trans_cnt; uint64_t size; u64 bytescount; void __iomem *acp_mmio;