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ASoC: bdw-rt5677: add channel constraint

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BDW boards using this machine driver supports only stereo capture and
playback. Implement a constraint to enforce it.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/1588007614-25061-2-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Brent Lu 2020-04-28 01:13:32 +08:00 committed by Mark Brown
parent 2d744ecf2b
commit e241f8e779
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GPG Key ID: 24D68B725D5487D0
1 changed files with 26 additions and 0 deletions
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26
sound/soc/intel/boards/bdw-rt5677.c
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@ -222,6 +222,31 @@ static int bdw_rt5677_rtd_init(struct snd_soc_pcm_runtime *rtd)
}
#endif
static const unsigned int channels[] = {
2,
};
static const struct snd_pcm_hw_constraint_list constraints_channels = {
.count = ARRAY_SIZE(channels),
.list = channels,
.mask = 0,
};
static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
/* Board supports stereo configuration only */
runtime->hw.channels_max = 2;
return snd_pcm_hw_constraint_list(runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&constraints_channels);
}
static const struct snd_soc_ops bdw_rt5677_fe_ops = {
.startup = bdw_rt5677_fe_startup,
};
static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd)
{
struct bdw_rt5677_priv *bdw_rt5677 =
@ -321,6 +346,7 @@ static struct snd_soc_dai_link bdw_rt5677_dais[] = {
},
.dpcm_capture = 1,
.dpcm_playback = 1,
.ops = &bdw_rt5677_fe_ops,
SND_SOC_DAILINK_REG(fe, dummy, platform),
},