linux-kernel - [PATCH 5.14 086/334] ASoC: tlv320aic32x4: Fix TAS2505/TAS2521 channel count

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Message-Id: <20210913131116.292595180@linuxfoundation.org>
Date:   Mon, 13 Sep 2021 15:12:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Marek Vasut <marex@...x.de>,
        Claudius Heine <ch@...x.de>, Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 086/334] ASoC: tlv320aic32x4: Fix TAS2505/TAS2521 channel count

From: Marek Vasut <marex@...x.de>

[ Upstream commit 3694f996be5cb8374bd224f4e5462c945d359843 ]

The TAS2505/TAS2521 does support up to two channels, LEFT and RIGHT,
which are being alternated on the audio data bus by Word Clock, WCLK.
This is documented in TI slau472 2.7.1 Digital Audio Interface. Note
that both the LEFT and RIGHT channels are only used for audio INPUT,
while only the LEFT channel is used for audio OUTPUT.

Fixes: b4525b6196cd7 ("ASoC: tlv320aic32x4: add support for TAS2505")
Signed-off-by: Marek Vasut <marex@...x.de>
Cc: Claudius Heine <ch@...x.de>
Cc: Mark Brown <broonie@...nel.org>
Link: https://lore.kernel.org/r/20210708091229.56443-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/codecs/tlv320aic32x4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index 2e9175b37dc9..254a016cb1f3 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -1131,7 +1131,7 @@ static struct snd_soc_dai_driver aic32x4_tas2505_dai = {
 	.playback = {
 			 .stream_name = "Playback",
 			 .channels_min = 1,
-			 .channels_max = 1,
+			 .channels_max = 2,
 			 .rates = SNDRV_PCM_RATE_8000_96000,
 			 .formats = AIC32X4_FORMATS,},
 	.ops = &aic32x4_ops,
-- 
2.30.2