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authorMukunda, Vijendar <Vijendar.Mukunda@amd.com>2018-08-06 09:27:15 +0200
committerMark Brown <broonie@kernel.org>2018-08-06 18:02:09 +0200
commit662fb3efe7ee835f0eeba6bc63b81e82a97fc312 (patch)
tree2dc0cc5c2c8dab64fbbb27f77de1e50e4986f28d /sound
parentASoC: AMD: Make ACP->SYSMEM DMA non circular (diff)
downloadlinux-662fb3efe7ee835f0eeba6bc63b81e82a97fc312.tar.xz
linux-662fb3efe7ee835f0eeba6bc63b81e82a97fc312.zip
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: Vijendar Mukunda <Vijendar.Mukunda@amd.com> Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/amd/acp-pcm-dma.c31
-rw-r--r--sound/soc/amd/acp.h1
2 files changed, 19 insertions, 13 deletions
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index 816abd65a6ed..32f27c5e4d93 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -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;
- 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);
+ 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);
}
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
index 0a2240bff62e..be3963e8f4fa 100644
--- a/sound/soc/amd/acp.h
+++ b/sound/soc/amd/acp.h
@@ -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;