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ASoC: pcm3168a: add hw constraint for channel

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

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2018-10-12 06:31:18 +00:00 committed by Mark Brown
parent 3809688980
commit 594680ea4a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 20 additions and 0 deletions
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20
sound/soc/codecs/pcm3168a.c
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@ -484,6 +484,7 @@ static int pcm3168a_startup(struct snd_pcm_substream *substream,
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int fmt; unsigned int fmt;
unsigned int sample_min; unsigned int sample_min;
unsigned int channel_max;
if (tx) if (tx)
fmt = pcm3168a->dac_fmt; fmt = pcm3168a->dac_fmt;
@ -496,19 +497,38 @@ static int pcm3168a_startup(struct snd_pcm_substream *substream,
* RIGHT_J : 24 / 16 * RIGHT_J : 24 / 16
* LEFT_J : 24 * LEFT_J : 24
* I2S : 24 * I2S : 24
*
* TDM available
*
* I2S
* LEFT_J
*/ */
switch (fmt) { switch (fmt) {
case PCM3168A_FMT_RIGHT_J: case PCM3168A_FMT_RIGHT_J:
sample_min = 16; 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; break;
default: default:
sample_min = 24; sample_min = 24;
channel_max = 2;
} }
snd_pcm_hw_constraint_minmax(substream->runtime, snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
sample_min, 32); sample_min, 32);
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_CHANNELS,
2, channel_max);
return 0; return 0;
} }
static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = { static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = {