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ASoC: bdw-rt5650: add channel constraint 

BDW boards using this machine driver supports only 2 or 4-channel capture.
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/1588007614-25061-3-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 01:13:33 +08:00 committed by Mark Brown
parent e241f8e779
commit 08d6713a40
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 29 additions and 0 deletions
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29
sound/soc/intel/boards/bdw-rt5650.c
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@ -162,6 +162,34 @@ static int bdw_rt5650_rtd_init(struct snd_soc_pcm_runtime *rtd)
}
#endif
static const unsigned int channels[] = {
2, 4,
};
static const struct snd_pcm_hw_constraint_list constraints_channels = {
.count = ARRAY_SIZE(channels),
.list = channels,
.mask = 0,
};
static int bdw_rt5650_fe_startup(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
/* Board supports stereo and quad configurations for capture */
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
return 0;
runtime->hw.channels_max = 4;
return snd_pcm_hw_constraint_list(runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&constraints_channels);
}
static const struct snd_soc_ops bdw_rt5650_fe_ops = {
.startup = bdw_rt5650_fe_startup,
};
static int bdw_rt5650_init(struct snd_soc_pcm_runtime *rtd)
{
struct bdw_rt5650_priv *bdw_rt5650 =
@ -234,6 +262,7 @@ static struct snd_soc_dai_link bdw_rt5650_dais[] = {
.name = "System PCM",
.stream_name = "System Playback",
.dynamic = 1,
.ops = &bdw_rt5650_fe_ops,
#if !IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
.init = bdw_rt5650_rtd_init,
#endif