Add constraint for ref DMIC to match with the topology firmware configured for machine sklnau8825max.
Signed-off-by: Yong Zhi yong.zhi@intel.com --- sound/soc/intel/boards/skl_nau88l25_max98357a.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/sound/soc/intel/boards/skl_nau88l25_max98357a.c b/sound/soc/intel/boards/skl_nau88l25_max98357a.c index 43fab12..57c3c86 100644 --- a/sound/soc/intel/boards/skl_nau88l25_max98357a.c +++ b/sound/soc/intel/boards/skl_nau88l25_max98357a.c @@ -352,8 +352,22 @@ 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);