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ASoC: Intel: avs: Initialize private data for subsequent HDA FEs 

HDAudio implementation found in sound/pci/hda expects a valid stream
pointer in substream->runtime->private_data location. For ASoC users,
that should point to a valid link stream which is assigned when BE
opens.

As BE borrows its runtime from FE, the information may be lost when
reparenting comes into picture - see dpcm_be_reparent(). To support the
DPCM reparenting functionality for HDAudio scenarios while still
fulfilling expectations of HDAudio common code, have all FEs point to
the same private data.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221118113052.1340593-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cezary Rojewski 2022-11-18 12:30:52 +01:00 committed by Mark Brown
parent b1af5b34d6
commit f38d4c72cb
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1 changed files with 21 additions and 1 deletions
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22
sound/soc/intel/avs/pcm.c
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@ -1394,9 +1394,29 @@ static int avs_component_hda_open(struct snd_soc_component *component,
if (!rtd->dai_link->no_pcm) {
struct snd_pcm_hardware hwparams = avs_pcm_hardware;
struct snd_soc_pcm_runtime *be;
struct snd_soc_dpcm *dpcm;
int dir = substream->stream;
/*
* Support the DPCM reparenting while still fulfilling expectations of HDAudio
* common code - a valid stream pointer at substream->runtime->private_data -
* by having all FEs point to the same private data.
*/
for_each_dpcm_be(rtd, dir, dpcm) {
struct snd_pcm_substream *be_substream;
be = dpcm->be;
if (be->dpcm[dir].users == 1)
break;
be_substream = snd_soc_dpcm_get_substream(be, dir);
substream->runtime->private_data = be_substream->runtime->private_data;
break;
}
/* RESUME unsupported for de-coupled HD-Audio capture. */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
if (dir == SNDRV_PCM_STREAM_CAPTURE)
hwparams.info &= ~SNDRV_PCM_INFO_RESUME;
return snd_soc_set_runtime_hwparams(substream, &hwparams);