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ASoC: dpcm: Apply symmetry for DPCM 

DPCM does not fully support symmetry attributes. soc_pcm_apply_symmetry()
is skipped in soc_pcm_open() for DPCM, without being applied elsewhere.
So HW parameters cannot be correctly limited, and user space can do
playback/capture at different rates while HW actually does not support it.
soc_pcm_params_symmetry() will return error and the second stream stops.

This patch adds soc_pcm_apply_symmetry() for FE, BE, and codec DAIs
in DPCM path that was skipped in soc_pcm_open().

Signed-off-by: PC Liao <pc.liao@mediatek.com>
Signed-off-by: Koro Chen <koro.chen@mediatek.com>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
PC Liao 2015-12-11 11:33:51 +08:00 committed by Mark Brown
parent 95f444dc93
commit 906c7d690c
1 changed files with 57 additions and 0 deletions
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57
sound/soc/soc-pcm.c
View File

@ -1616,6 +1616,56 @@ static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
snd_pcm_stream_unlock_irq(substream);
}
static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
int stream)
{
struct snd_soc_dpcm *dpcm;
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
int err;
/* apply symmetry for FE */
if (soc_pcm_has_symmetry(fe_substream))
fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
/* Symmetry only applies if we've got an active stream. */
if (fe_cpu_dai->active) {
err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
if (err < 0)
return err;
}
/* apply symmetry for BE */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
int i;
if (soc_pcm_has_symmetry(be_substream))
be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
/* Symmetry only applies if we've got an active stream. */
if (rtd->cpu_dai->active) {
err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
if (err < 0)
return err;
}
for (i = 0; i < rtd->num_codecs; i++) {
if (rtd->codec_dais[i]->active) {
err = soc_pcm_apply_symmetry(be_substream,
rtd->codec_dais[i]);
if (err < 0)
return err;
}
}
}
return 0;
}
static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
{
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
@ -1644,6 +1694,13 @@ static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
dpcm_set_fe_runtime(fe_substream);
snd_pcm_limit_hw_rates(runtime);
ret = dpcm_apply_symmetry(fe_substream, stream);
if (ret < 0) {
dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
ret);
goto unwind;
}
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return 0;