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ASoC: tas2764: Fix set_tdm_slot in case of single slot

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[ Upstream commit faac764ea1 ]

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: 827ed8a0fa ("ASoC: tas2764: Add the driver for the TAS2764")
Suggested-by: Jos Dehaes <jos.dehaes@gmail.com>
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20221027095800.16094-2-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Martin Povišer 2022-10-27 11:57:59 +02:00 • committed by Justin Hammond
parent 652d63f211
commit dabc744518
1 changed files with 6 additions and 13 deletions
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19
sound/soc/codecs/tas2764.c
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@ -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)