Unverified Commit 594680ea authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

ASoC: pcm3168a: add hw constraint for channel 



LEFT_J / I2S only can use TDM.
This patch adds channel constraint for it.

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 38096889

sound/soc/codecs/pcm3168a.c

+20 −0
Original line number Diff line number Diff line
@@ -484,6 +484,7 @@ static int pcm3168a_startup(struct snd_pcm_substream *substream, 
	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;

	unsigned int fmt;

	unsigned int sample_min;

	unsigned int channel_max;



	if (tx)

		fmt = pcm3168a->dac_fmt;
@@ -496,19 +497,38 @@ static int pcm3168a_startup(struct snd_pcm_substream *substream, 
	 * RIGHT_J : 24 / 16

	 * LEFT_J  : 24

	 * I2S     : 24

	 *

	 * TDM available

	 *

	 * I2S

	 * LEFT_J

	 */

	switch (fmt) {

	case PCM3168A_FMT_RIGHT_J:

		sample_min  = 16;

		channel_max =  2;

		break;

	case PCM3168A_FMT_LEFT_J:

		sample_min  = 24;

		channel_max =  8;

		break;

	case PCM3168A_FMT_I2S:

		sample_min  = 24;

		channel_max =  8;

		break;

	default:

		sample_min  = 24;

		channel_max =  2;

	}



	snd_pcm_hw_constraint_minmax(substream->runtime,

				     SNDRV_PCM_HW_PARAM_SAMPLE_BITS,

				     sample_min, 32);



	snd_pcm_hw_constraint_minmax(substream->runtime,

				     SNDRV_PCM_HW_PARAM_CHANNELS,

				     2, channel_max);



	return 0;

}

static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = {