From: Richard Fitzgerald rf@opensource.cirrus.com
[ Upstream commit 926ef1a4c245c093acc07807e466ad2ef0ff6ccb ]
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@opensource.cirrus.com Fixes: 2cdba9b045c7 ("ASoC: cs42l42: Use bclk from hw_params if set_sysclk was not called") Link: https://lore.kernel.org/r/20210729170929.6589-3-rf@opensource.cirrus.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 0d31c84b0445..fe73a5c70bdd 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -820,6 +820,10 @@ 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) {