From 0c7941a63a0f46cfd4c41f30e5fcd55e678d535c Mon Sep 17 00:00:00 2001
From: Yong Zhi <yong.zhi@intel.com>
Date: Tue, 17 May 2016 09:43:05 -0700
Subject: [PATCH] ASoC: Intel: Skylake: Use refcap device for mono recording
Only mono channel is allowed for refcap device.
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>
---
sound/soc/intel/boards/skl_nau88l25_ssm4567.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
index e19aa99c4f72..2647d885ee00 100644
--- a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
+++ b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
@@ -430,8 +430,22 @@ 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);
--
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