/* Same as snd_soc_dapm_put_volsw, but change power state */
static int wm8350_dapm_put_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
struct snd_soc_codec *codec = widget->codec;
if (ucontrol->value.integer.value[0]) {
if (codec->dapm_state != SNDRV_CTL_POWER_D0) {
wm8350_dapm_event(codec, SNDRV_CTL_POWER_D1);
snd_soc_dapm_put_volsw(kcontrol, ucontrol);
wm8350_dapm_event(codec, SNDRV_CTL_POWER_D0);
} else
snd_soc_dapm_put_volsw(kcontrol, ucontrol);
} else {
snd_soc_dapm_put_volsw(kcontrol, ucontrol);
wm8350_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
}
}
/*
* When used with DAC outputs only the WM8903 charge pump supports
* operation in class W mode, providing very low power consumption
* when used with digital sources. Enable and disable this mode
* automatically depending on the mixer configuration.
*
* All the relevant controls are simple switches.
*/
static int wm8903_class_w_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
struct snd_soc_codec *codec = widget->codec;
struct wm8903_priv *wm8903 = codec->private_data;
struct i2c_client *i2c = codec->control_data;
u16 reg;
int ret;
reg = snd_soc_read(codec, WM8903_CLASS_W_0);
/* Turn it off if we're about to enable bypass */
if (ucontrol->value.integer.value[0]) {
if (wm8903->class_w_users == 0) {
dev_dbg(&i2c->dev, "Disabling Class W\n");
snd_soc_write(codec, WM8903_CLASS_W_0, reg &
~(WM8903_CP_DYN_FREQ | WM8903_CP_DYN_V));
}
wm8903->class_w_users++;
}
/* Implement the change */
ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
/* If we've just disabled the last bypass path turn Class W on */
if (!ucontrol->value.integer.value[0]) {
if (wm8903->class_w_users == 1) {
dev_dbg(&i2c->dev, "Enabling Class W\n");
snd_soc_write(codec, WM8903_CLASS_W_0, reg |
WM8903_CP_DYN_FREQ | WM8903_CP_DYN_V);
}
wm8903->class_w_users--;
}
dev_dbg(&i2c->dev, "Bypass use count now %d\n",
wm8903->class_w_users);
return ret;
}
