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ASoC: soc-pcm: Don't reconnect an already active BE

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In some cases, multiple FE components have the same BE component in their
respective DPCM paths. One such example would be a mixer component, which
can receive two or more inputs and sends a mixed output. In such cases,
to avoid reconfiguration of already active DAI (mixer output DAI in this
case), check the BE stream state to filter out the redundancy.

In summary, allow connection of BE if the respective current stream state
is either NEW or CLOSED.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/1631551342-25469-2-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sameer Pujar 2021-09-13 22:12:09 +05:30 committed by Mark Brown
parent 2266721938
commit 0c25db3f76
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/soc-pcm.c
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@ -1395,6 +1395,10 @@ static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
if (!fe->dpcm[stream].runtime && !fe->fe_compr) if (!fe->dpcm[stream].runtime && !fe->fe_compr)
continue; continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
continue;
/* newly connected FE and BE */ /* newly connected FE and BE */
err = dpcm_be_connect(fe, be, stream); err = dpcm_be_connect(fe, be, stream);
if (err < 0) { if (err < 0) {