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Message-Id: <20231027105747.32450-2-srinivas.kandagatla@linaro.org>
Date: Fri, 27 Oct 2023 11:57:46 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: broonie@...nel.org
Cc: johan@...nel.org, perex@...ex.cz, tiwai@...e.com,
lgirdwood@...il.com, linux-kernel@...r.kernel.org,
alsa-devel@...a-project.org,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [RFC PATCH 1/2] ASoC: soc-dai: add flag to mute and unmute stream during trigger
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@...aro.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(-)
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index e3906ecda740..5827b4d882fc 100644
--- 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 {
diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 02dd64dea179..28d8c6c3d3b2 100644
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -641,6 +641,10 @@ int snd_soc_pcm_dai_trigger(struct snd_pcm_substream *substream,
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_pcm_substream *substream,
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 */
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 3aa6b988cb4b..0f9f4da25158 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -703,8 +703,10 @@ static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
if (snd_soc_dai_active(dai) == 0)
soc_pcm_set_dai_params(dai, NULL);
- if (snd_soc_dai_stream_active(dai, substream->stream) == 0)
- snd_soc_dai_digital_mute(dai, 1, substream->stream);
+ if (snd_soc_dai_stream_active(dai, substream->stream) == 0) {
+ if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
+ snd_soc_dai_digital_mute(dai, 1, substream->stream);
+ }
}
}
@@ -898,8 +900,10 @@ static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
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);
--
2.21.0
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