Use constraint to enforce the period sizes which are validated in Android BSP.
Signed-off-by: Brent Lu brent.lu@intel.com --- sound/soc/intel/atom/sst-mfld-platform-pcm.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c index 49b9f18..f614651 100644 --- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c +++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c @@ -300,6 +300,16 @@ static void power_down_sst(struct sst_runtime_stream *stream) stream->ops->power(sst->dev, false); }
+static const unsigned int media_period_size[] = { + /* sizes validated on Android platform */ + 240, 320, 960, 3072 +}; + +static const struct snd_pcm_hw_constraint_list constraints_media_period_size = { + .count = ARRAY_SIZE(media_period_size), + .list = media_period_size, +}; + static int sst_media_open(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -333,6 +343,11 @@ static int sst_media_open(struct snd_pcm_substream *substream, if (ret_val < 0) return ret_val;
+ /* Avoid using period size which is not validated */ + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, + &constraints_media_period_size); + /* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2);