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ASoC: SOF: ipc4-topology: Implement tear_down_all_pipelines callback 

During system suspend there is a chance that the running stream undergo
an xrun and instead of the expected SNDRV_PCM_TRIGGER_SUSPEND trigger
we will receive SNDRV_PCM_TRIGGER_STOP.

The handling of SUSPEND and STOP triggers differ that case of the later
the sof_pcm_stream_free() will be called with free_widget_list = false.
But we must make sure that all active widgets and streams are free before
entering suspend in order to be able to resume without error.

We can utilize the tear_down_all_pipelines to put the system to an expected
state and to fix the suspend/resume error.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20221107084158.26629-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2022-11-07 10:41:58 +02:00 committed by Mark Brown
parent bc63a806ac
commit 18cd1f3227
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1 changed files with 34 additions and 0 deletions
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34
sound/soc/sof/ipc4-topology.c
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@ -1813,6 +1813,39 @@ static int sof_ipc4_dai_get_clk(struct snd_sof_dev *sdev, struct snd_sof_dai *da
return -EINVAL;
}
static int sof_ipc4_tear_down_all_pipelines(struct snd_sof_dev *sdev, bool verify)
{
struct snd_sof_pcm *spcm;
int dir, ret;
/*
* This function is called during system suspend, we need to make sure
* that all streams have been freed up.
* Freeing might have been skipped when xrun happened just at the start
* of the suspend and it sent a SNDRV_PCM_TRIGGER_STOP to the active
* stream. This will call sof_pcm_stream_free() with
* free_widget_list = false which will leave the kernel and firmware out
* of sync during suspend/resume.
*
* This will also make sure that paused streams handled correctly.
*/
list_for_each_entry(spcm, &sdev->pcm_list, list) {
for_each_pcm_streams(dir) {
struct snd_pcm_substream *substream = spcm->stream[dir].substream;
if (!substream || !substream->runtime)
continue;
if (spcm->stream[dir].list) {
ret = sof_pcm_stream_free(sdev, substream, spcm, dir, true);
if (ret < 0)
return ret;
}
}
}
return 0;
}
static enum sof_tokens host_token_list[] = {
SOF_COMP_TOKENS,
SOF_AUDIO_FMT_NUM_TOKENS,
@ -1913,4 +1946,5 @@ const struct sof_ipc_tplg_ops ipc4_tplg_ops = {
.dai_config = sof_ipc4_dai_config,
.parse_manifest = sof_ipc4_parse_manifest,
.dai_get_clk = sof_ipc4_dai_get_clk,
.tear_down_all_pipelines = sof_ipc4_tear_down_all_pipelines,
};