Muting the DAC masks artefacts introduced as the digital stream shuts down, for example when the input stops being clocked.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/soc-core.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 1563cee..ad38113 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -340,6 +340,12 @@ static int soc_codec_close(struct snd_pcm_substream *substream) } codec->active--;
+ /* Muting the DAC suppresses artifacts caused during digital + * shutdown, for example from stopping clocks. + */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dai_digital_mute(codec_dai, 1); + if (cpu_dai->ops.shutdown) cpu_dai->ops.shutdown(substream);