[alsa-devel] [PATCH v2] ASoC: ak4613: disable asymmetric audio interface format

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

Asymmetric audio interface formats exist in ak4613 by same
register settings.

	Capture		Playback
	24bit LEFT_J	16bit RIGHT_J
	24bit LEFT_J	20bit RIGHT_J
	24bit LEFT_J	24bit RIGHT_J
	24bit LEFT_J	24bit LEFT_J
	24bit I2S	24bit I2S

These asymmetric formats makes driver / behavior difficult.
It is not HW limitation, but SW limitation. To makes code reading
easy, this patch removes asymmetric format support.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v1 -> v2

 - just remove code instead of comment out

 sound/soc/codecs/ak4613.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
index b2dfdde..557ac16 100644
--- a/sound/soc/codecs/ak4613.c
+++ b/sound/soc/codecs/ak4613.c
@@ -139,9 +139,7 @@ struct ak4613_priv {
 #define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
 static const struct ak4613_interface ak4613_iface[] = {
 	/* capture */				/* playback */
-	[0] = {	AUDIO_IFACE(24, LEFT_J),	AUDIO_IFACE(16, RIGHT_J) },
-	[1] = {	AUDIO_IFACE(24, LEFT_J),	AUDIO_IFACE(20, RIGHT_J) },
-	[2] = {	AUDIO_IFACE(24, LEFT_J),	AUDIO_IFACE(24, RIGHT_J) },
+	/* [0] - [2] are not supported */
 	[3] = {	AUDIO_IFACE(24, LEFT_J),	AUDIO_IFACE(24, LEFT_J) },
 	[4] = {	AUDIO_IFACE(24, I2S),		AUDIO_IFACE(24, I2S) },
 };
@@ -262,11 +260,9 @@ static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	fmt &= SND_SOC_DAIFMT_FORMAT_MASK;
 
 	switch (fmt) {
-	case SND_SOC_DAIFMT_RIGHT_J:
 	case SND_SOC_DAIFMT_LEFT_J:
 	case SND_SOC_DAIFMT_I2S:
 		priv->fmt = fmt;
-
 		break;
 	default:
 		return -EINVAL;
@@ -286,13 +282,8 @@ static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
 	if (fmts->fmt != fmt)
 		return false;
 
-	if (fmt == SND_SOC_DAIFMT_RIGHT_J) {
-		if (fmts->width != width)
-			return false;
-	} else {
-		if (fmts->width < width)
-			return false;
-	}
+	if (fmts->width != width)
+		return false;
 
 	return true;
 }
@@ -420,8 +411,7 @@ static int ak4613_set_bias_level(struct snd_soc_codec *codec,
 				 SNDRV_PCM_RATE_96000  |\
 				 SNDRV_PCM_RATE_176400 |\
 				 SNDRV_PCM_RATE_192000)
-#define AK4613_PCM_FMTBIT	(SNDRV_PCM_FMTBIT_S16_LE |\
-				 SNDRV_PCM_FMTBIT_S24_LE)
+#define AK4613_PCM_FMTBIT	(SNDRV_PCM_FMTBIT_S24_LE)
 
 static struct snd_soc_dai_driver ak4613_dai = {
 	.name = "ak4613-hifi",
-- 
1.9.1