ASoC: Intel: Skylake: Add channel constraints for refcap
Add constraint for ref DMIC to match with the
topology firmware config.
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/intel/boards/skl_nau88l25_max98357a.c b/sound/soc/intel/boards/skl_nau88l25_max98357a.c
index d280865..fc3f475 100644
--- a/sound/soc/intel/boards/skl_nau88l25_max98357a.c
+++ b/sound/soc/intel/boards/skl_nau88l25_max98357a.c
@@ -382,8 +382,22 @@
.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 skylake_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);