ASoC: rsnd: enable multiple DVC valume settings

DVC controls some digital volume features.
Some of them requests values for "each channels",
but, some of them requests values for "feature".
Current dvc.c is supporting Mute/Volume,
and these have "each channels" settings.
This patch adds rsnd_dvc_cfg_m and care about
multiple settings for each channels.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/dvc.c

@@ -17,6 +17,12 @@
 
 struct rsnd_dvc_cfg {
 	unsigned int max;
+	unsigned int size;
+	u32 *val;
+};
+
+struct rsnd_dvc_cfg_m {
+	struct rsnd_dvc_cfg cfg;
 	u32 val[RSND_DVC_CHANNELS];
 };
 
@@ -24,8 +30,8 @@ struct rsnd_dvc {
 	struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
 	struct rsnd_mod mod;
 	struct clk *clk;
-	struct rsnd_dvc_cfg volume;
-	struct rsnd_dvc_cfg mute;
+	struct rsnd_dvc_cfg_m volume;
+	struct rsnd_dvc_cfg_m mute;
 };
 
 #define rsnd_mod_to_dvc(_mod)	\
@@ -44,9 +50,8 @@ static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
 	u32 mute = 0;
 	int i;
 
-	for (i = 0; i < RSND_DVC_CHANNELS; i++) {
-		mute |= (!!dvc->mute.val[i]) << i;
-	}
+	for (i = 0; i < dvc->mute.cfg.size; i++)
+		mute |= (!!dvc->mute.cfg.val[i]) << i;
 
 	/* Disable DVC Register access */
 	rsnd_mod_write(mod, DVC_DVUER, 0);
@@ -159,7 +164,7 @@ static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 {
 	struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 
-	uinfo->count = RSND_DVC_CHANNELS;
+	uinfo->count = cfg->size;
 	uinfo->value.integer.min = 0;
 	uinfo->value.integer.max = cfg->max;
 
@@ -177,7 +182,7 @@ static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 	struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 	int i;
 
-	for (i = 0; i < RSND_DVC_CHANNELS; i++)
+	for (i = 0; i < cfg->size; i++)
 		ucontrol->value.integer.value[i] = cfg->val[i];
 
 	return 0;
@@ -190,7 +195,7 @@ static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 	struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 	int i, change = 0;
 
-	for (i = 0; i < RSND_DVC_CHANNELS; i++) {
+	for (i = 0; i < cfg->size; i++) {
 		change |= (ucontrol->value.integer.value[i] != cfg->val[i]);
 		cfg->val[i] = ucontrol->value.integer.value[i];
 	}
@@ -230,6 +235,19 @@ static int __rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 	return 0;
 }
 
+static int _rsnd_dvc_pcm_new_m(struct rsnd_mod *mod,
+			       struct rsnd_dai *rdai,
+			       struct snd_soc_pcm_runtime *rtd,
+			       const unsigned char *name,
+			       struct rsnd_dvc_cfg_m *private,
+			       u32 max)
+{
+	private->cfg.max	= max;
+	private->cfg.size	= RSND_DVC_CHANNELS;
+	private->cfg.val	= private->val;
+	return __rsnd_dvc_pcm_new(mod, rdai, rtd, name, &private->cfg);
+}
+
 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 			    struct rsnd_dai *rdai,
 			    struct snd_soc_pcm_runtime *rtd)
@@ -239,20 +257,18 @@ static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 	int ret;
 
 	/* Volume */
-	dvc->volume.max = 0x00800000 - 1;
-	ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
+	ret = _rsnd_dvc_pcm_new_m(mod, rdai, rtd,
 			rsnd_dai_is_play(rdai, io) ?
 			"DVC Out Playback Volume" : "DVC In Capture Volume",
-			&dvc->volume);
+			&dvc->volume, 0x00800000 - 1);
 	if (ret < 0)
 		return ret;
 
 	/* Mute */
-	dvc->mute.max = 1;
-	ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
+	ret = _rsnd_dvc_pcm_new_m(mod, rdai, rtd,
 			rsnd_dai_is_play(rdai, io) ?
 			"DVC Out Mute Switch" : "DVC In Mute Switch",
-			&dvc->mute);
+			&dvc->mute, 1);
 	if (ret < 0)
 		return ret;