An I2S frame always has a left and right channel slot even if mono
data is being sent. So if channels==1 the actual bitclock frequency
is 2 * snd_soc_params_to_bclk(params).
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 2cdba9b045c7 ("ASoC: cs42l42: Use bclk from hw_params if set_sysclk was not called")
---
sound/soc/codecs/cs42l42.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 38e243a815b1..08ca05bfbeb3 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -830,6 +830,10 @@ static int cs42l42_pcm_hw_params(struct snd_pcm_substream *substream,
cs42l42->srate = params_rate(params);
cs42l42->bclk = snd_soc_params_to_bclk(params);
+ /* I2S frame always has 2 channels even for mono audio */
+ if (channels == 1)
+ cs42l42->bclk *= 2;
+
switch(substream->stream) {
case SNDRV_PCM_STREAM_CAPTURE:
if (channels == 2) {
--
2.11.0
