linux-kernel - [stable 4.19+][PATCH 16/20] ASoC: stm32: i2s: fix 16 bit format support

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Message-Id: <20191115223356.27675-16-mathieu.poirier@linaro.org>
Date:   Fri, 15 Nov 2019 15:33:52 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [stable 4.19+][PATCH 16/20] ASoC: stm32: i2s: fix 16 bit format support

From: Olivier Moysan <olivier.moysan@...com>

commit 0c4c68d6fa1bae74d450e50823c24fcc3cd0b171 upstream

I2S supports 16 bits data in 32 channel length.
However the expected driver behavior, is to
set channel length to 16 bits when data format is 16 bits.

Signed-off-by: Olivier Moysan <olivier.moysan@...com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Cc: stable <stable@...r.kernel.org> # 4.19+
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 sound/soc/stm/stm32_i2s.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 449bb7049a28..004d83091505 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -501,7 +501,7 @@ static int stm32_i2s_configure(struct snd_soc_dai *cpu_dai,
 	switch (format) {
 	case 16:
 		cfgr = I2S_CGFR_DATLEN_SET(I2S_I2SMOD_DATLEN_16);
-		cfgr_mask = I2S_CGFR_DATLEN_MASK;
+		cfgr_mask = I2S_CGFR_DATLEN_MASK | I2S_CGFR_CHLEN;
 		break;
 	case 32:
 		cfgr = I2S_CGFR_DATLEN_SET(I2S_I2SMOD_DATLEN_32) |
-- 
2.17.1