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

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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 <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2008-12-09 12:35:46 +02:00 committed by Mark Brown
parent 44c5587035
commit e8ff9c417a
1 changed files with 24 additions and 0 deletions
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24
sound/soc/codecs/twl4030.c
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@ -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: