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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2018-10-12 06:31:00 +0000
committerMark Brown <broonie@kernel.org>2018-10-12 18:52:06 +0200
commit3809688980205622f75ed5d5890759430da4e7e4 (patch)
tree06e290e243c400e56ec7ec587d5f1cddae2743be /sound
parenta23f5dc8448694a0ffe2127a04aa5787b9cf9e5f (diff)
downloadlinux-3809688980205622f75ed5d5890759430da4e7e4.tar.bz2
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/pcm3168a.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c
index 3356c91f55b0..233a8df5d7a5 100644
--- a/sound/soc/codecs/pcm3168a.c
+++ b/sound/soc/codecs/pcm3168a.c
@@ -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,