This is a note to let you know that I've just added the patch titled
ASoC: cs42l42: Always configure both ASP TX channels
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-cs42l42-always-configure-both-asp-tx-channels.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 92cf8e8393afba849688d973977c3d0b57bc77d8
Author: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri Oct 15 14:36:05 2021 +0100
ASoC: cs42l42: Always configure both ASP TX channels
[ 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@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 585e7079de0e ("ASoC: cs42l42: Add Capture Support")
Link: https://lore.kernel.org/r/20211015133619.4698-3-rf@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 |
