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ASoC: Intel: bxt: Use refcap device for mono recording 

The refcap capture device supports mono recording only, this patch
adds the channel constraints.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Yong Zhi 2018-08-02 18:21:31 -05:00 committed by Mark Brown
parent 611cbc8799
commit 26a6dce8ef
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GPG Key ID: 24D68B725D5487D0
1 changed files with 14 additions and 0 deletions
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14
sound/soc/intel/boards/bxt_da7219_max98357a.c
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@ -324,8 +324,22 @@ static const struct snd_pcm_hw_constraint_list constraints_16000 = {
.list = rates_16000,
};
static const unsigned int ch_mono[] = {
1,
};
static const struct snd_pcm_hw_constraint_list constraints_refcap = {
.count = ARRAY_SIZE(ch_mono),
.list = ch_mono,
};
static int broxton_refcap_startup(struct snd_pcm_substream *substream)
{
substream->runtime->hw.channels_max = 1;
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&constraints_refcap);
return snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&constraints_16000);