diff options
Diffstat (limited to 'sound/soc/intel/atom/sst-mfld-platform-pcm.c')
| -rw-r--r-- | sound/soc/intel/atom/sst-mfld-platform-pcm.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c index b1cac7abdc0a..9e9b05883557 100644 --- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c +++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c @@ -333,6 +333,17 @@ static int sst_media_open(struct snd_pcm_substream *substream, if (ret_val < 0) goto out_power_up; + /* + * Make sure the period to be multiple of 1ms to align the + * design of firmware. Apply same rule to buffer size to make + * sure alsa could always find a value for period size + * regardless the buffer size given by user space. + */ + snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48); + snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48); + /* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2); @@ -366,7 +377,7 @@ static int sst_media_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sst_runtime_stream *stream; - int ret_val = 0, str_id; + int ret_val, str_id; stream = substream->runtime->private_data; str_id = stream->stream_info.str_id; @@ -385,7 +396,7 @@ static int sst_media_prepare(struct snd_pcm_substream *substream, if (ret_val) return ret_val; substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; - return ret_val; + return 0; } static int sst_enable_ssp(struct snd_pcm_substream *substream, |