diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/intel/sst-baytrail-pcm.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/sound/soc/intel/sst-baytrail-pcm.c b/sound/soc/intel/sst-baytrail-pcm.c index 6d101f3813b4..b8a89e9f753d 100644 --- a/sound/soc/intel/sst-baytrail-pcm.c +++ b/sound/soc/intel/sst-baytrail-pcm.c @@ -45,6 +45,9 @@ struct sst_byt_pcm_data { struct sst_byt_stream *stream; struct snd_pcm_substream *substream; struct mutex mutex; + + /* latest DSP DMA hw pointer */ + u32 hw_ptr; }; /* private data for the driver */ @@ -168,13 +171,19 @@ static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data) struct snd_pcm_substream *substream = pcm_data->substream; struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_pcm_runtime *rtd = substream->private_data; - u32 pos; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt *byt = pdata->byt; + u32 pos, hw_pos; + hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream, + snd_pcm_lib_buffer_bytes(substream)); + pcm_data->hw_ptr = hw_pos; pos = frames_to_bytes(runtime, (runtime->control->appl_ptr % runtime->buffer_size)); - dev_dbg(rtd->dev, "PCM: App pointer %d bytes\n", pos); + dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos); snd_pcm_period_elapsed(substream); return pos; @@ -184,20 +193,11 @@ static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; - struct sst_byt_priv_data *pdata = - snd_soc_platform_get_drvdata(rtd->platform); struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); - struct sst_byt *byt = pdata->byt; - snd_pcm_uframes_t offset; - int pos; - pos = sst_byt_get_dsp_position(byt, pcm_data->stream, - snd_pcm_lib_buffer_bytes(substream)); - offset = bytes_to_frames(runtime, pos); + dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr); - dev_dbg(rtd->dev, "PCM: DMA pointer %zu bytes\n", - frames_to_bytes(runtime, (u32)offset)); - return offset; + return bytes_to_frames(runtime, pcm_data->hw_ptr); } static int sst_byt_pcm_open(struct snd_pcm_substream *substream) |