6.5-stable review patch. If anyone has any objections, please let me know.
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From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
commit f0220575e65abe09c09cd17826a3cdea76e8d58f upstream.
In some setups like Speaker amps which are very sensitive, ex: keeping them unmute without actual data stream for very short duration results in a static charge and results in pop and clicks. To minimize this, provide a way to mute and unmute such codecs during trigger callbacks.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Tested-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20231027105747.32450-2-srinivas.kandagatla@linaro.... Signed-off-by: Mark Brown broonie@kernel.org [ johan: backport to v6.6.2 ] Signed-off-by: Johan Hovold johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/sound/soc-dai.h | 1 + sound/soc/soc-dai.c | 7 +++++++ sound/soc/soc-pcm.c | 12 ++++++++---- 3 files changed, 16 insertions(+), 4 deletions(-)
--- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -355,6 +355,7 @@ struct snd_soc_dai_ops {
/* bit field */ unsigned int no_capture_mute:1; + unsigned int mute_unmute_on_trigger:1; };
struct snd_soc_cdai_ops { --- a/sound/soc/soc-dai.c +++ b/sound/soc/soc-dai.c @@ -641,6 +641,10 @@ int snd_soc_pcm_dai_trigger(struct snd_p ret = soc_dai_trigger(dai, substream, cmd); if (ret < 0) break; + + if (dai->driver->ops && dai->driver->ops->mute_unmute_on_trigger) + snd_soc_dai_digital_mute(dai, 0, substream->stream); + soc_dai_mark_push(dai, substream, trigger); } break; @@ -651,6 +655,9 @@ int snd_soc_pcm_dai_trigger(struct snd_p if (rollback && !soc_dai_mark_match(dai, substream, trigger)) continue;
+ if (dai->driver->ops && dai->driver->ops->mute_unmute_on_trigger) + snd_soc_dai_digital_mute(dai, 1, substream->stream); + r = soc_dai_trigger(dai, substream, cmd); if (r < 0) ret = r; /* use last ret */ --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -896,8 +896,10 @@ static int __soc_pcm_prepare(struct snd_ snd_soc_dapm_stream_event(rtd, substream->stream, SND_SOC_DAPM_STREAM_START);
- for_each_rtd_dais(rtd, i, dai) - snd_soc_dai_digital_mute(dai, 0, substream->stream); + for_each_rtd_dais(rtd, i, dai) { + if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) + snd_soc_dai_digital_mute(dai, 0, substream->stream); + }
out: return soc_pcm_ret(rtd, ret); @@ -939,8 +941,10 @@ static int soc_pcm_hw_clean(struct snd_s if (snd_soc_dai_active(dai) == 1) soc_pcm_set_dai_params(dai, NULL);
- if (snd_soc_dai_stream_active(dai, substream->stream) == 1) - snd_soc_dai_digital_mute(dai, 1, substream->stream); + if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { + if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) + snd_soc_dai_digital_mute(dai, 1, substream->stream); + } }
/* run the stream event */