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

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>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index f8223fae5804..b2849538cbfe 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -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 */