[PATCH 1/3] ASoC: Intel: avs: Unprepare a stream when recovery occurs

[Cezary Rojewski]

Recovery on alsa-lib side is handled with either:
1) snd_pcm_prepare(state=XRUN)
2) snd_pcm_drop/drain() -> snd_pcm_prepare(state=SETUP)

before starting the PCM anew. Relying solely on state=XRUN leaves 2)
unaccounted for. sound/core/pcm_native.c ensures correctness of the
state machine so plain state!=PREPARED check suffices.

This is the BE equivalent of job done previously for FE side only with
commit cfca1637bc2b ("ASoC: Intel: avs: Unprepare a stream when XRUN
occurs") and its follow up titled: ("ASoC: Intel: avs: Reset the stream
unless it is already prepared").

Link: https://lore.kernel.org/linux-sound/20261010103753.16969-1-stiraspo@xxxxxxxxx/T/
Fixes: d070002a20fc ("ASoC: Intel: avs: HDA PCM BE operations")
Signed-off-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
---
 sound/soc/intel/avs/pcm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/intel/avs/pcm.c b/sound/soc/intel/avs/pcm.c
index 3cf455e8b879..a0a0d645ea33 100644
--- a/sound/soc/intel/avs/pcm.c
+++ b/sound/soc/intel/avs/pcm.c
@@ -461,6 +461,8 @@ static int avs_dai_hda_be_prepare(struct snd_pcm_substream *substream, struct sn
 	link_stream = data->link_stream;
 	p = &be->dpcm[substream->stream].hw_params;
 
+	if (substream->runtime->state != SNDRV_PCM_STATE_PREPARED)
+		link_stream->link_prepared = false;
 	if (link_stream->link_prepared)
 		return 0;
 
-- 
2.34.1