diff options
Diffstat (limited to 'sound/soc/apple/mca.c')
| -rw-r--r-- | sound/soc/apple/mca.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c index 24381c42eb54..2b0a3760d3f7 100644 --- a/sound/soc/apple/mca.c +++ b/sound/soc/apple/mca.c @@ -456,6 +456,28 @@ err: return -EINVAL; } +static int mca_fe_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct mca_cluster *cl = mca_dai_to_cluster(dai); + unsigned int mask, nchannels; + + if (cl->tdm_slots) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + mask = cl->tdm_tx_mask; + else + mask = cl->tdm_rx_mask; + + nchannels = hweight32(mask); + } else { + nchannels = 2; + } + + return snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_CHANNELS, + 1, nchannels); +} + static int mca_fe_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) { @@ -672,6 +694,7 @@ static int mca_fe_hw_params(struct snd_pcm_substream *substream, } static const struct snd_soc_dai_ops mca_fe_ops = { + .startup = mca_fe_startup, .set_fmt = mca_fe_set_fmt, .set_bclk_ratio = mca_set_bclk_ratio, .set_tdm_slot = mca_fe_set_tdm_slot, |