linux-kernel - [PATCH] ASoC: rt5659: add S32

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Date:   Mon, 20 Jan 2020 11:47:39 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <oder_chiou@...ltek.com>, <bardliao@...ltek.com>, <tiwai@...e.com>,
        <perex@...ex.cz>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        Sameer Pujar <spujar@...dia.com>
Subject: [PATCH] ASoC: rt5659: add S32_LE format

ALC5659 supports maximum data length of 24-bit. Currently driver supports
S24_LE which is a 32-bit container with valid data in [23:0] and 0s in MSB.
S24_3LE is not commonly used and is hard to find audio streams with this
format. Also many SoC HW do not support S24_LE and S32_LE is used in
general. The 24-bit data can be represented in S32_LE [31:8] and 0s are
padded in LSB.

This patch adds S32_LE to ALC5659 driver and data length for this is set
to 24 as per codec's maximum data length support. This helps to play
24-bit audio, packed in S32_LE, on HW which do not support S24_LE.

Signed-off-by: Sameer Pujar <spujar@...dia.com>
---
 sound/soc/codecs/rt5659.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5659.c b/sound/soc/codecs/rt5659.c
index fc74dd63..f910ddf 100644
--- a/sound/soc/codecs/rt5659.c
+++ b/sound/soc/codecs/rt5659.c
@@ -3339,6 +3339,7 @@ static int rt5659_hw_params(struct snd_pcm_substream *substream,
 		val_len |= RT5659_I2S_DL_20;
 		break;
 	case 24:
+	case 32:
 		val_len |= RT5659_I2S_DL_24;
 		break;
 	case 8:
@@ -3733,7 +3734,8 @@ static int rt5659_resume(struct snd_soc_component *component)

 #define RT5659_STEREO_RATES SNDRV_PCM_RATE_8000_192000
 #define RT5659_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
-		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8)
+		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE | \
+		SNDRV_PCM_FMTBIT_S8)

 static const struct snd_soc_dai_ops rt5659_aif_dai_ops = {
 	.hw_params = rt5659_hw_params,
-- 
2.7.4