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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-09-06 18:33:24 +0100
committerJaroslav Kysela <perex@perex.cz>2008-09-09 09:11:59 +0200
commit6010b2da1f11752dd58191423fc9878b0ce420c8 (patch)
treec96d329d2e3e17d4da2de15d6fc359a5022fc691 /sound
parent3e860846d7f44993ded9b4fbf36e7b051b86df08 (diff)
ALSA: ASoC: Use codec digital mute when stopping playback
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> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-core.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1563ceedf61..ad381138fc2 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);