[alsa-devel] [RFC 1/2] ASoC: soc-pcm: Add flag to ignore pmdown_time at pcm_close

[Peter Ujfalusi]

With this flag machine drivers can indicate that it is desired
to ignore the pmdown_time for DAPM shutdown sequence when
playback stream is stopped.
The DAPM sequence will be executed without delay in this case.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
---
 include/sound/soc.h |    3 +++
 sound/soc/soc-pcm.c |   15 +++++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 858291d..7b75b68 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -717,6 +717,9 @@ struct snd_soc_dai_link {
 	/* Symmetry requirements */
 	unsigned int symmetric_rates:1;
 
+	/* Will ingore the pmdown_time for playback stream */
+	unsigned int ignore_pmdown_time:1;
+
 	/* codec/machine specific init - e.g. add machine controls */
 	int (*init)(struct snd_soc_pcm_runtime *rtd);
 
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 8eb0f07..faac256 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -319,10 +319,17 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 	cpu_dai->runtime = NULL;
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		/* start delayed pop wq here for playback streams */
-		codec_dai->pop_wait = 1;
-		schedule_delayed_work(&rtd->delayed_work,
-			msecs_to_jiffies(rtd->pmdown_time));
+		if (unlikely(rtd->dai_link->ignore_pmdown_time)) {
+			/* powered down playback stream now */
+			snd_soc_dapm_stream_event(rtd,
+				codec_dai->driver->playback.stream_name,
+				SND_SOC_DAPM_STREAM_STOP);
+		} else {
+			/* start delayed pop wq here for playback streams */
+			codec_dai->pop_wait = 1;
+			schedule_delayed_work(&rtd->delayed_work,
+				msecs_to_jiffies(rtd->pmdown_time));
+		}
 	} else {
 		/* capture streams can be powered down now */
 		snd_soc_dapm_stream_event(rtd,
-- 
1.7.7