[PATCH v2 06/24] ASoC: soc-compress: Stop running dpcm on free

[Peter Ujfalusi <peter.ujfalusi@linux.intel.com>]

If the last trigger that the compr device received is a DRAIN then the
DPCM is left in running state (no stop trigger is sent).
Before we execute the free we need to send a STOP trigger to make sure that
both BE and FE is in expected state and prepared for closing.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
---
 sound/soc/soc-compress.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index e9f6ab8c1678..3e1c11c788ef 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -311,6 +311,16 @@ static int soc_compr_free_fe(struct snd_compr_stream *cstream)
 	struct snd_soc_dpcm *dpcm;
 	int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 
+	/*
+	 * The core will not send a STOP trigger on free if the device is in
+	 * DRAIN state, but we need to stop BE and FE before we can proceed to
+	 * free the stream.
+	 * Run the STOP trigger if the DPCM state is START (DRAIN is not
+	 * changing the DPCM state).
+	 */
+	if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
+		cstream->ops->trigger(cstream, SNDRV_PCM_TRIGGER_STOP);
+
 	snd_soc_card_mutex_lock(fe->card);
 
 	snd_soc_dpcm_mutex_lock(fe);
-- 
2.55.0