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ALSA: ASoC: Add support for generic DAPM register modifier widget

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This generic register modifier widget is for updating multiple codec
register bits at once when the widget changes its power state.

Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jarkko Nikula 2008-06-25 14:42:07 +03:00 committed by Jaroslav Kysela
parent a5c95e90c1
commit e2be2ccf94
2 changed files with 33 additions and 0 deletions
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14
include/sound/soc-dapm.h
View file

@ -130,6 +130,13 @@
{ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
.shift = wshift, .invert = winvert}
/* generic register modifier widget */
#define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \
{ .id = wid, .name = wname, .kcontrols = NULL, .num_kcontrols = 0, \
.reg = -((wreg) + 1), .shift = wshift, .mask = wmask, \
.on_val = won_val, .off_val = woff_val, .event = dapm_reg_event, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
/* dapm kcontrol types */
#define SOC_DAPM_SINGLE(xname, reg, shift, max, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
@ -227,6 +234,10 @@ int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
/* dapm sys fs - used by the core */
int snd_soc_dapm_sys_add(struct device *dev);
/* event handler for register modifier widget - used by the soc-dapm */
int dapm_reg_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
/* dapm audio endpoint control */
int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
char *pin, int status);
@ -298,6 +309,9 @@ struct snd_soc_dapm_widget {
unsigned char shift; /* bits to shift */
unsigned int saved_value; /* widget saved value */
unsigned int value; /* widget current value */
unsigned int mask; /* non-shifted mask */
unsigned int on_val; /* on state value */
unsigned int off_val; /* off state value */
unsigned char power:1; /* block power status */
unsigned char invert:1; /* invert the power bit */
unsigned char active:1; /* active stream on DAC, ADC's */

19
sound/soc/soc-dapm.c
View file

@ -442,6 +442,25 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
return con;
}
/*
* Handler for generic register modifier widget.
*/
int dapm_reg_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
unsigned int val;
if (SND_SOC_DAPM_EVENT_ON(event))
val = w->on_val;
else
val = w->off_val;
snd_soc_update_bits(w->codec, -(w->reg + 1),
w->mask << w->shift, val << w->shift);
return 0;
}
/*
* Scan each dapm widget for complete audio path.
* A complete path is a route that has valid endpoints i.e.:-