From: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx> Using hw register to read transmitted byte count and report accordingly the hw pointer. BUG=b:63121716 TEST= modprobe snd-soc-acp-pcm.ko modprobe snd-soc-acp-rt5645.ko aplay <file> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com> Signed-off-by: Akshu Agrawal <Akshu.Agrawal at amd.com> Reviewed-on: https://chromium-review.googlesource.com/659699 Commit-Ready: Akshu Agrawal <akshu.agrawal at amd.com> Tested-by: Akshu Agrawal <akshu.agrawal at amd.com> Reviewed-by: Jason Clinton <jclinton at chromium.org> Reviewed-on: https://chromium-review.googlesource.com/676627 Signed-off-by: Alex Deucher <alexander.deucher at amd.com> --- sound/soc/amd/acp-pcm-dma.c | 71 ++++++++++++++++++++++++++++----------------- sound/soc/amd/acp.h | 10 +++++++ 2 files changed, 55 insertions(+), 26 deletions(-) diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c index 73b58ee..e19f281 100644 --- a/sound/soc/amd/acp-pcm-dma.c +++ b/sound/soc/amd/acp-pcm-dma.c @@ -817,39 +817,48 @@ static int acp_dma_hw_free(struct snd_pcm_substream *substream) return snd_pcm_lib_free_pages(substream); } +static u64 acp_get_byte_count(void __iomem *acp_mmio, int stream) +{ + union acp_dma_count playback_dma_count; + union acp_dma_count capture_dma_count; + u64 bytescount = 0; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + playback_dma_count.bcount.high = acp_reg_read(acp_mmio, + mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH); + playback_dma_count.bcount.low = acp_reg_read(acp_mmio, + mmACP_I2S_TRANSMIT_BYTE_CNT_LOW); + bytescount = playback_dma_count.bytescount; + } else { + capture_dma_count.bcount.high = acp_reg_read(acp_mmio, + mmACP_I2S_RECEIVED_BYTE_CNT_HIGH); + capture_dma_count.bcount.low = acp_reg_read(acp_mmio, + mmACP_I2S_RECEIVED_BYTE_CNT_LOW); + bytescount = capture_dma_count.bytescount; + } + return bytescount; +} + static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream) { - u16 dscr; - u32 mul, dma_config, period_bytes; + u32 buffersize; u32 pos = 0; + u64 bytescount = 0; struct snd_pcm_runtime *runtime = substream->runtime; struct audio_substream_data *rtd = runtime->private_data; - period_bytes = frames_to_bytes(runtime, runtime->period_size); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - dscr = acp_reg_read(rtd->acp_mmio, mmACP_DMA_CUR_DSCR_13); + buffersize = frames_to_bytes(runtime, runtime->buffer_size); + bytescount = acp_get_byte_count(rtd->acp_mmio, substream->stream); - if (dscr == PLAYBACK_START_DMA_DESCR_CH13) - mul = 0; - else - mul = 1; - pos = (mul * period_bytes); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + if (bytescount > rtd->renderbytescount) + bytescount = bytescount - rtd->renderbytescount; + pos = bytescount % buffersize; } else { - dma_config = acp_reg_read(rtd->acp_mmio, mmACP_DMA_CNTL_14); - if (dma_config != 0) { - dscr = acp_reg_read(rtd->acp_mmio, - mmACP_DMA_CUR_DSCR_14); - if (dscr == CAPTURE_START_DMA_DESCR_CH14) - mul = 1; - else - mul = 2; - pos = (mul * period_bytes); - } - - if (pos >= (2 * period_bytes)) - pos = 0; - + if (bytescount > rtd->capturebytescount) + bytescount = bytescount - rtd->capturebytescount; + pos = bytescount % buffersize; } return bytes_to_frames(runtime, pos); } @@ -904,6 +913,7 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) { int ret; u32 loops = 1000; + u64 bytescount = 0; struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_pcm_runtime *prtd = substream->private_data; @@ -915,7 +925,11 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: case SNDRV_PCM_TRIGGER_RESUME: + bytescount = acp_get_byte_count(rtd->acp_mmio, + substream->stream); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + if (rtd->renderbytescount == 0) + rtd->renderbytescount = bytescount; acp_dma_start(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM, false); while (acp_reg_read(rtd->acp_mmio, mmACP_DMA_CH_STS) & @@ -932,6 +946,8 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) ACP_TO_I2S_DMA_CH_NUM, true); } else { + if (rtd->capturebytescount == 0) + rtd->capturebytescount = bytescount; acp_dma_start(rtd->acp_mmio, I2S_TO_ACP_DMA_CH_NUM, true); } @@ -945,12 +961,15 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd) * channels will stopped automatically after its transfer * completes : SYSRAM_TO_ACP_CH_NUM / ACP_TO_SYSRAM_CH_NUM */ - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { ret = acp_dma_stop(rtd->acp_mmio, ACP_TO_I2S_DMA_CH_NUM); - else + rtd->renderbytescount = 0; + } else { ret = acp_dma_stop(rtd->acp_mmio, I2S_TO_ACP_DMA_CH_NUM); + rtd->capturebytescount = 0; + } break; default: ret = -EINVAL; diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h index a330a99..de08ff0 100644 --- a/sound/soc/amd/acp.h +++ b/sound/soc/amd/acp.h @@ -83,6 +83,8 @@ struct audio_substream_data { u16 num_of_pages; u16 direction; uint64_t size; + u64 renderbytescount; + u64 capturebytescount; void __iomem *acp_mmio; }; @@ -93,6 +95,14 @@ struct audio_drv_data { u32 asic_type; }; +union acp_dma_count { + struct { + u32 low; + u32 high; + } bcount; + u64 bytescount; +}; + enum { ACP_TILE_P1 = 0, ACP_TILE_P2, -- 2.5.5
