This is a note to let you know that I've just added the patch titled
ASoC: tas2764: Fix set_tdm_slot in case of single slot
to the 5.15-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-tas2764-fix-set_tdm_slot-in-case-of-single-slot.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f9fb9f38f407ba8838cc676a204021b2262977d9
Author: Martin Povišer <povik+lin@xxxxxxxxxxx>
Date: Thu Oct 27 11:57:59 2022 +0200
ASoC: tas2764: Fix set_tdm_slot in case of single slot
[ Upstream commit faac764ea1ea6898d93e46c403271fb105c0906e ]
There's a special branch in the set_tdm_slot op for the case of nslots
being 1, but:
(1) That branch can never work (there's a check for tx_mask being
non-zero, later there's another check for it *being* zero; one or
the other always throws -EINVAL).
(2) The intention of the branch seems to be what the general other
branch reduces to in case of nslots being 1.
For those reasons remove the 'nslots being 1' special case.
Fixes: 827ed8a0fa50 ("ASoC: tas2764: Add the driver for the TAS2764")
Suggested-by: Jos Dehaes <jos.dehaes@xxxxxxxxx>
Signed-off-by: Martin Povišer <povik+lin@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221027095800.16094-2-povik+lin@xxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index afb4c0d7e714..1951bae95b31 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -386,20 +386,13 @@ static int tas2764_set_dai_tdm_slot(struct snd_soc_dai *dai,
if (tx_mask == 0 || rx_mask != 0)
return -EINVAL;
- if (slots == 1) {
- if (tx_mask != 1)
- return -EINVAL;
- left_slot = 0;
- right_slot = 0;
+ left_slot = __ffs(tx_mask);
+ tx_mask &= ~(1 << left_slot);
+ if (tx_mask == 0) {
+ right_slot = left_slot;
} else {
- left_slot = __ffs(tx_mask);
- tx_mask &= ~(1 << left_slot);
- if (tx_mask == 0) {
- right_slot = left_slot;
- } else {
- right_slot = __ffs(tx_mask);
- tx_mask &= ~(1 << right_slot);
- }
+ right_slot = __ffs(tx_mask);
+ tx_mask &= ~(1 << right_slot);
}
if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
