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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2018-10-12 06:31:18 +0000
committerMark Brown <broonie@kernel.org>2018-10-12 18:52:07 +0200
commit594680ea4a394f19d38a39a7d7c673fbad02a3d6 (patch)
tree93fdeeae67ab6c587509c6b5b5db12ff173773b9 /sound
parent3809688980205622f75ed5d5890759430da4e7e4 (diff)
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ASoC: pcm3168a: add hw constraint for channel
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/pcm3168a.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c
index 233a8df5d7a5..f0e2b886323e 100644
--- a/sound/soc/codecs/pcm3168a.c
+++ b/sound/soc/codecs/pcm3168a.c
@@ -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 = {