[v3,5/5] ASoC: Intel: Skylake: Use refcap device for mono recording
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Message ID 1464323476-28957-1-git-send-email-yong.zhi@intel.com
State New
Headers show

Commit Message

Yong Zhi May 27, 2016, 4:31 a.m. UTC
Only mono channel is allowed for refcap device.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
---
 sound/soc/intel/boards/skl_nau88l25_ssm4567.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch
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diff --git a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
index d4e174f..d151f1f 100644
--- a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
+++ b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
@@ -401,8 +401,22 @@  static 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 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);