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ASoC: pcm3168a: add HW constraint for non RIGHT_J 

RIGHT_J only can handle 16bit data bits.
Current driver just errored if user requests non RIGHT_J
+ 16bit combination. But it is not useful for user.
This patch adds HW constraint for it, and avoid
error on such situation.

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 06:31:00 +00:00 committed by Mark Brown
parent a23f5dc844
commit 3809688980
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GPG Key ID: 24D68B725D5487D0
1 changed files with 36 additions and 0 deletions
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36
sound/soc/codecs/pcm3168a.c
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@ -476,7 +476,43 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
return 0;
}
static int pcm3168a_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int fmt;
unsigned int sample_min;
if (tx)
fmt = pcm3168a->dac_fmt;
else
fmt = pcm3168a->adc_fmt;
/*
* Available Data Bits
*
* RIGHT_J : 24 / 16
* LEFT_J : 24
* I2S : 24
*/
switch (fmt) {
case PCM3168A_FMT_RIGHT_J:
sample_min = 16;
break;
default:
sample_min = 24;
}
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
sample_min, 32);
return 0;
}
static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = {
.startup = pcm3168a_startup,
.set_fmt = pcm3168a_set_dai_fmt_dac,
.set_sysclk = pcm3168a_set_dai_sysclk,
.hw_params = pcm3168a_hw_params,