From: Yong Zhi <yong.zhi@intel.com>
Date: Tue, 17 May 2016 16:43:04 +0000 (-0700)
Subject: ASoC: Intel: Skylake: Add channel constraints for refcap
X-Git-Tag: v4.8-rc1~84^2~1^2~14^2~62
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d6c9f6afaf4d309223c0ccc60f67f21e21d71a17;p=karo-tx-linux.git

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 d2808652b974..fc3f4750c432 100644
--- a/sound/soc/intel/boards/skl_nau88l25_max98357a.c
+++ b/sound/soc/intel/boards/skl_nau88l25_max98357a.c
@@ -382,8 +382,22 @@ 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);