[alsa-devel] Applied "ASoC: ak4613: tidyup CTRL1 value selection method" to the asoc tree

[Mark Brown]

The patch

   ASoC: ak4613: tidyup CTRL1 value selection method

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 35299f1779dbdcb61af4305904963b5bc9276eb9 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Date: Mon, 16 Nov 2015 06:01:29 +0000
Subject: [PATCH] ASoC: ak4613: tidyup CTRL1 value selection method

Current CTRL1 selection method didn't care about simultaneous
playback / capture. This patch tidyup it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/ak4613.c | 90 ++++++++++++++++++++++++++++-------------------
 1 file changed, 54 insertions(+), 36 deletions(-)

diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
index 394c10ff049e..dab127603ff6 100644
--- a/sound/soc/codecs/ak4613.c
+++ b/sound/soc/codecs/ak4613.c
@@ -74,16 +74,6 @@
 #define DFS_DOUBLE_SPEED	(1 << 2)
 #define DFS_QUAD_SPEED		(2 << 2)
 
-struct ak4613_priv {
-	struct mutex lock;
-
-	unsigned int fmt;
-	u8 fmt_ctrl;
-	u8 oc;
-	u8 ic;
-	int cnt;
-};
-
 struct ak4613_formats {
 	unsigned int width;
 	unsigned int fmt;
@@ -94,6 +84,16 @@ struct ak4613_interface {
 	struct ak4613_formats playback;
 };
 
+struct ak4613_priv {
+	struct mutex lock;
+	const struct ak4613_interface *iface;
+
+	unsigned int fmt;
+	u8 oc;
+	u8 ic;
+	int cnt;
+};
+
 /*
  * Playback Volume
  *
@@ -128,7 +128,7 @@ static const struct reg_default ak4613_reg[] = {
 	{ 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
 };
 
-#define AUDIO_IFACE_IDX_TO_VAL(i) (i << 3)
+#define AUDIO_IFACE_TO_VAL(fmts) ((fmts - ak4613_iface) << 3)
 #define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
 static const struct ak4613_interface ak4613_iface[] = {
 	/* capture */				/* playback */
@@ -242,7 +242,7 @@ static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
 		priv->cnt = 0;
 	}
 	if (!priv->cnt)
-		priv->fmt_ctrl = NO_FMT;
+		priv->iface = NULL;
 	mutex_unlock(&priv->lock);
 }
 
@@ -267,13 +267,35 @@ static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	return 0;
 }
 
+static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
+				    int is_play,
+				    unsigned int fmt, unsigned int width)
+{
+	const struct ak4613_formats *fmts;
+
+	fmts = (is_play) ? &iface->playback : &iface->capture;
+
+	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;
+	}
+
+	return true;
+}
+
 static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
-	const struct ak4613_formats *fmts;
+	const struct ak4613_interface *iface;
 	struct device *dev = codec->dev;
 	unsigned int width = params_width(params);
 	unsigned int fmt = priv->fmt;
@@ -307,33 +329,27 @@ static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
 	 * It doesn't support TDM at this point
 	 */
 	fmt_ctrl = NO_FMT;
-	for (i = 0; i < ARRAY_SIZE(ak4613_iface); i++) {
-		fmts = (is_play) ?	&ak4613_iface[i].playback :
-					&ak4613_iface[i].capture;
-
-		if (fmts->fmt != fmt)
-			continue;
+	ret = -EINVAL;
+	iface = NULL;
 
-		if (fmt == SND_SOC_DAIFMT_RIGHT_J) {
-			if (fmts->width != width)
-				continue;
-		} else {
-			if (fmts->width < width)
+	mutex_lock(&priv->lock);
+	if (priv->iface) {
+		if (ak4613_dai_fmt_matching(priv->iface, is_play, fmt, width))
+			iface = priv->iface;
+	} else {
+		for (i = ARRAY_SIZE(ak4613_iface); i >= 0; i--) {
+			if (!ak4613_dai_fmt_matching(ak4613_iface + i,
+						     is_play,
+						     fmt, width))
 				continue;
+			iface = ak4613_iface + i;
+			break;
 		}
-
-		fmt_ctrl = AUDIO_IFACE_IDX_TO_VAL(i);
-		break;
 	}
 
-	ret = -EINVAL;
-	if (fmt_ctrl == NO_FMT)
-		goto hw_params_end;
-
-	mutex_lock(&priv->lock);
-	if ((priv->fmt_ctrl == NO_FMT) ||
-	    (priv->fmt_ctrl == fmt_ctrl)) {
-		priv->fmt_ctrl = fmt_ctrl;
+	if ((priv->iface == NULL) ||
+	    (priv->iface == iface)) {
+		priv->iface = iface;
 		priv->cnt++;
 		ret = 0;
 	}
@@ -342,6 +358,8 @@ static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		goto hw_params_end;
 
+	fmt_ctrl = AUDIO_IFACE_TO_VAL(iface);
+
 	snd_soc_update_bits(codec, CTRL1, FMT_MASK, fmt_ctrl);
 	snd_soc_write(codec, CTRL2, ctrl2);
 
@@ -487,7 +505,7 @@ static int ak4613_i2c_probe(struct i2c_client *i2c,
 
 	ak4613_parse_of(priv, dev);
 
-	priv->fmt_ctrl		= NO_FMT;
+	priv->iface		= NULL;
 	priv->cnt		= 0;
 
 	mutex_init(&priv->lock);
-- 
2.6.2