ASoC: TWL4030: Add DAPM event handler for output MUX selection

DAPM event handler is set to filter out invalid MUX settings for certain outputs. Earpiece: - 0 = Off - 1 = DACL1 - 2 = DACL2 - 3 = *** Invalid *** - 4 = DACR1 PreDriveL/R: - 0 = Off/Off - 1 = DACL1/DACR1 - 2 = DACL2/DACR2 - 3 = *** Invalid/Invalid *** - 4 = DACR2/DACL2 Signed-off-by: Peter Ujfalusi <[email protected]> Signed-off-by: Mark Brown <[email protected]>
mgowda · Dec 9, 2008 · e8ff9c4 · e8ff9c4
1 parent 44c5587
commit e8ff9c4
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
@@ -190,6 +190,30 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)
 
 }
 
+static int outmixer_event(struct snd_soc_dapm_widget *w,
+	struct snd_kcontrol *kcontrol, int event)
+{
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	int ret = 0;
+	int val;
+
+	switch (e->reg) {
+	case TWL4030_REG_PREDL_CTL:
+	case TWL4030_REG_PREDR_CTL:
+	case TWL4030_REG_EAR_CTL:
+		val = w->value >> e->shift_l;
+		if (val == 3) {
+			printk(KERN_WARNING
+			"Invalid MUX setting for register 0x%02x (%d)\n",
+			      e->reg, val);
+			ret = -1;
+		}
+		break;
+	}
+
+	return ret;
+}
+
 /*
  * Some of the gain controls in TWL (mostly those which are associated with
  * the outputs) are implemented in an interesting way: