From: Richard Fitzgerald rf@opensource.cirrus.com
[ Upstream commit 6e6825801ab926360f7f4f2dbcfd107d5ab8f025 ]
An I2S frame always has two slots (left and right) even when sending mono. The right channel (channel 2) of ASP TX will always have the same bit width as the left channel and will always be on the high phase of LRCLK.
The previous implementation always passed the field masks for both channels to snd_soc_component_update_bits() but for mono the written value only contained the settings for channel 1. The result was that for mono channel 2 was set to 8-bit (which is an invalid configuration) with both channels on the low phase of LRCLK.
Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com Fixes: 585e7079de0e ("ASoC: cs42l42: Add Capture Support") Link: https://lore.kernel.org/r/20211015133619.4698-3-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 | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 8838b9a0de8e4..4f8d8a65643df 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -845,11 +845,10 @@ static int cs42l42_pcm_hw_params(struct snd_pcm_substream *substream,
switch(substream->stream) { case SNDRV_PCM_STREAM_CAPTURE: - if (channels == 2) { - val |= CS42L42_ASP_TX_CH2_AP_MASK; - val |= width << CS42L42_ASP_TX_CH2_RES_SHIFT; - } - val |= width << CS42L42_ASP_TX_CH1_RES_SHIFT; + /* channel 2 on high LRCLK */ + val = CS42L42_ASP_TX_CH2_AP_MASK | + (width << CS42L42_ASP_TX_CH2_RES_SHIFT) | + (width << CS42L42_ASP_TX_CH1_RES_SHIFT);
snd_soc_component_update_bits(component, CS42L42_ASP_TX_CH_AP_RES, CS42L42_ASP_TX_CH1_AP_MASK | CS42L42_ASP_TX_CH2_AP_MASK |