[PATCH v2] ASoC: dapm: Remove incomplete stereo code

["Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>]

Stereo is not yet supported by dapm widgets, so remove stereo code from
snd_soc_dapm_get_volsw(), and warn if stereo controls are detected.

Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <alsa-devel@alsa-project.org>
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
---
 .../sound/soc/soc-dapm.c                           |   22 +++++++++++---------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git linux-next-HEAD-f9637ba.orig/sound/soc/soc-dapm.c linux-next-HEAD-f9637ba/sound/soc/soc-dapm.c
index c93e832..e80f2e3 100644
--- linux-next-HEAD-f9637ba.orig/sound/soc/soc-dapm.c
+++ linux-next-HEAD-f9637ba/sound/soc/soc-dapm.c
@@ -2464,23 +2464,20 @@ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
 		(struct soc_mixer_control *)kcontrol->private_value;
 	unsigned int reg = mc->reg;
 	unsigned int shift = mc->shift;
-	unsigned int rshift = mc->rshift;
 	int max = mc->max;
-	unsigned int invert = mc->invert;
 	unsigned int mask = (1 << fls(max)) - 1;
+	unsigned int invert = mc->invert;
+
+	if (snd_soc_volsw_is_stereo(mc))
+		dev_warn(widget->dapm->dev,
+			 "Control '%s' is stereo, which is not supported\n",
+			 kcontrol->id.name);
 
 	ucontrol->value.integer.value[0] =
 		(snd_soc_read(widget->codec, reg) >> shift) & mask;
-	if (shift != rshift)
-		ucontrol->value.integer.value[1] =
-			(snd_soc_read(widget->codec, reg) >> rshift) & mask;
-	if (invert) {
+	if (invert)
 		ucontrol->value.integer.value[0] =
 			max - ucontrol->value.integer.value[0];
-		if (shift != rshift)
-			ucontrol->value.integer.value[1] =
-				max - ucontrol->value.integer.value[1];
-	}
 
 	return 0;
 }
@@ -2514,6 +2511,11 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
 	struct snd_soc_dapm_update update;
 	int wi;
 
+	if (snd_soc_volsw_is_stereo(mc))
+		dev_warn(widget->dapm->dev,
+			 "Control '%s' is stereo, which is not supported\n",
+			 kcontrol->id.name);
+
 	val = (ucontrol->value.integer.value[0] & mask);
 	connect = !!val;
 
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