linux-kernel - [PATCH v2 2/2] ASoC: atmel: atmel_ssc_dai: Drop S24_LE support due to single channel limitation

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Message-ID: <20240916131910.22680-3-andrei.simion@microchip.com>
Date: Mon, 16 Sep 2024 16:19:10 +0300
From: Andrei Simion <andrei.simion@...rochip.com>
To: <claudiu.beznea@...on.dev>, <lgirdwood@...il.com>, <broonie@...nel.org>,
	<perex@...ex.cz>, <tiwai@...e.com>, <nicolas.ferre@...rochip.com>,
	<alexandre.belloni@...tlin.com>
CC: <alsa-devel@...a-project.org>, <linux-sound@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>, Andrei Simion
	<andrei.simion@...rochip.com>
Subject: [PATCH v2 2/2] ASoC: atmel: atmel_ssc_dai: Drop S24_LE support due to single channel limitation

From: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>

Drop S24_LE format because it is not supported if more than 2 channels
(of TDM slots) are used. This limitation makes it impractical for use cases
requiring more than 2 TDM slots, leading to potential issues in
multi-channel configurations.

[andrei.simion@...rochip.com: Reword the commit title and the commit
message. Add code comment to explain the removed code.]

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Signed-off-by: Andrei Simion <andrei.simion@...rochip.com>
---
v1 -> v2:
- add code comment to explain why S24_LE is dropped.
---
 sound/soc/atmel/atmel_ssc_dai.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index 7047f17fe7a8..89098f41679c 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -821,8 +821,9 @@ static int atmel_ssc_resume(struct snd_soc_component *component)
 	return 0;
 }
 
+/* S24_LE is not supported if more than 2 channels (of TDM slots) are used. */
 #define ATMEL_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8     | SNDRV_PCM_FMTBIT_S16_LE |\
-			  SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+			   SNDRV_PCM_FMTBIT_S32_LE)
 
 static const struct snd_soc_dai_ops atmel_ssc_dai_ops = {
 	.startup	= atmel_ssc_startup,
-- 
2.34.1