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ASoC: broadwell: add channel constraint 

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/1588007614-25061-4-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 01:13:34 +08:00 committed by Mark Brown
parent 08d6713a40
commit ad18763f46
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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/broadwell.c
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@ -143,6 +143,31 @@ static int broadwell_rtd_init(struct snd_soc_pcm_runtime *rtd)
} }
#endif #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 broadwell_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 broadwell_fe_ops = {
.startup = broadwell_fe_startup,
};
SND_SOC_DAILINK_DEF(system, SND_SOC_DAILINK_DEF(system,
DAILINK_COMP_ARRAY(COMP_CPU("System Pin"))); DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));
@ -180,6 +205,7 @@ static struct snd_soc_dai_link broadwell_rt286_dais[] = {
.init = broadwell_rtd_init, .init = broadwell_rtd_init,
#endif #endif
.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, .trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
.ops = &broadwell_fe_ops,
.dpcm_playback = 1, .dpcm_playback = 1,
.dpcm_capture = 1, .dpcm_capture = 1,
SND_SOC_DAILINK_REG(system, dummy, platform), SND_SOC_DAILINK_REG(system, dummy, platform),