ASoC: pcm: call snd_soc_dapm_stream_stop() in soc_pcm_hw_clean

Currently, the SND_SOC_DAPM_STREAM_START event is sent during
pcm_prepare() but the SND_SOC_DAPM_STREAM_STOP event is
sent only in dpcm_fe_dai_shutdown() after soc_pcm_close().
This results in an imbalance between when the DAPM widgets
receive the PRE/POST_PMU/PMD events. So call
snd_soc_dapm_stream_stop() in soc_pcm_hw_clean() before the
snd_soc_pcm_component_hw_free() to keep the stream_stop DAPM
event balanced with the stream_start event in soc_pm_prepare().

Also, in order to prevent duplicate DAPM stream events,
remove the call for DAPM STREAM_START event in dpcm_fe_dai_prepare()
and the call for DAPM STREAM_STOP event in dpcm_fe_dai_shutdown().
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20201117215001.163107-1-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -662,8 +662,6 @@ static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback)
 
 	soc_pcm_components_close(substream, rollback);
 
-	if (!rollback)
-		snd_soc_dapm_stream_stop(rtd, substream->stream);
 
 	mutex_unlock(&rtd->card->pcm_mutex);
 
@@ -882,6 +880,9 @@ static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback)
 			snd_soc_dai_digital_mute(dai, 1, substream->stream);
 	}
 
+	/* run the stream event */
+	snd_soc_dapm_stream_stop(rtd, substream->stream);
+
 	/* free any machine hw params */
 	snd_soc_link_hw_free(substream, rollback);
 
@@ -1859,9 +1860,6 @@ static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
 	/* now shutdown the frontend */
 	soc_pcm_close(substream);
 
-	/* run the stream event for each BE */
-	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
-
 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
 	dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
 	return 0;
@@ -2363,8 +2361,6 @@ static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
 		goto out;
 	}
 
-	/* run the stream event for each BE */
-	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 
 out: