linux-kernel - [PATCH] ASoC: Intel: kbl_rt5663_rt5514_max98927: Add dmic format constraint

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Date:   Thu, 12 Sep 2019 10:27:40 +0800
From:   Yu-Hsuan Hsu <yuhsuan@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        Yu-Hsuan Hsu <yuhsuan@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        alsa-devel@...a-project.org
Subject: [PATCH] ASoC: Intel: kbl_rt5663_rt5514_max98927: Add dmic format constraint

24 bits recording from DMIC is not supported for KBL platform because
the TDM slot between PCH and codec is 16 bits only. We should add a
constraint to remove that unsupported format.

Signed-off-by: Yu-Hsuan Hsu <yuhsuan@...omium.org>
---
 sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 74dda8784f1a01..67b276a65a8d2d 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -400,6 +400,9 @@ 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);
 }
-- 
2.23.0.162.g0b9fbb3734-goog