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Commit 370f7e11 authored by Yu-Hsuan Hsu's avatar Yu-Hsuan Hsu Committed by Greg Kroah-Hartman
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ASoC: Intel: kbl_rt5663_rt5514_max98927: Add dmic format constraint 



[ Upstream commit e2db787bdcb4f2722ecf410168f0583764634e45 ]

On KBL platform, the microphone is attached to external codec(rt5514)
instead of PCH. However, TDM slot between PCH and codec is 16 bits only.
In order to avoid setting wrong format, we should add a constraint to
force to use 16 bits format forever.

Signed-off-by: default avatarYu-Hsuan Hsu <yuhsuan@chromium.org>
Acked-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190923162940.199580-1-yuhsuan@chromium.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent e6e50631

sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c

+3 −0
Original line number Diff line number Diff line
@@ -423,6 +423,9 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream) 
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,

			dmic_constraints);



	runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;

	snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);



	return snd_pcm_hw_constraint_list(substream->runtime, 0,

			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);

}