ASoC: Support DAPM events for DACs and ADCs

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc-dapm.h

@@ -140,9 +140,19 @@
 #define SND_SOC_DAPM_DAC(wname, stname, wreg, wshift, winvert) \
 {	.id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
 	.shift = wshift, .invert = winvert}
+#define SND_SOC_DAPM_DAC_E(wname, stname, wreg, wshift, winvert, \
+			   wevent, wflags)				\
+{	.id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
+	.shift = wshift, .invert = winvert, \
+	.event = wevent, .event_flags = wflags}
 #define SND_SOC_DAPM_ADC(wname, stname, wreg, wshift, winvert) \
 {	.id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
 	.shift = wshift, .invert = winvert}
+#define SND_SOC_DAPM_ADC_E(wname, stname, wreg, wshift, winvert, \
+			   wevent, wflags)				\
+{	.id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
+	.shift = wshift, .invert = winvert, \
+	.event = wevent, .event_flags = wflags}
 
 /* generic register modifier widget */
 #define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \

sound/soc/soc-dapm.c

@@ -598,18 +598,22 @@ static int dapm_power_widget(struct snd_soc_codec *codec, int event,
 	if (w->id == snd_soc_dapm_adc && w->active) {
 		in = is_connected_input_ep(w);
 		dapm_clear_walk(w->codec);
-		w->power = (in != 0) ? 1 : 0;
-		dapm_update_bits(w);
-		return 0;
+		power = (in != 0) ? 1 : 0;
+		if (power == w->power)
+			return 0;
+		w->power = power;
+		return dapm_generic_apply_power(w);
 	}
 
 	/* active DAC */
 	if (w->id == snd_soc_dapm_dac && w->active) {
 		out = is_connected_output_ep(w);
 		dapm_clear_walk(w->codec);
-		w->power = (out != 0) ? 1 : 0;
-		dapm_update_bits(w);
-		return 0;
+		power = (out != 0) ? 1 : 0;
+		if (power == w->power)
+			return 0;
+		w->power = power;
+		return dapm_generic_apply_power(w);
 	}
 
 	/* pre and post event widgets */