From 0c7941a63a0f46cfd4c41f30e5fcd55e678d535c Mon Sep 17 00:00:00 2001 From: Yong Zhi 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 Acked-by: Vinod Koul Signed-off-by: Mark Brown --- 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); -- 2.20.1