ASoC: dapm: Add output driver widget

In some cases it was not possible to follow the appropiate power
ON/OFF sequence like in cases where the PGA needs to be enabled
before the driver and disabled before the PGA for pop reduction.

Add a widget to support output driver (speaker, haptic, vibra, etc)
drivers where power ON/OFF ordering is important.
Signed-off-by: Margarita Olaya Cabrera <magi.olaya@ti.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc-dapm.h

@@ -71,6 +71,10 @@
 	 wcontrols, wncontrols) \
 {	.id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
 	.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
+#define SND_SOC_DAPM_OUT_DRV(wname, wreg, wshift, winvert,\
+	 wcontrols, wncontrols) \
+{	.id = snd_soc_dapm_out_drv, .name = wname, .reg = wreg, .shift = wshift, \
+	.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
 #define SND_SOC_DAPM_MIXER(wname, wreg, wshift, winvert, \
 	 wcontrols, wncontrols)\
 {	.id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
@@ -115,6 +119,11 @@
 {	.id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
 	.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
 	.event = wevent, .event_flags = wflags}
+#define SND_SOC_DAPM_OUT_DRV_E(wname, wreg, wshift, winvert, wcontrols, \
+	wncontrols, wevent, wflags) \
+{	.id = snd_soc_dapm_out_drv, .name = wname, .reg = wreg, .shift = wshift, \
+	.invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
+	.event = wevent, .event_flags = wflags}
 #define SND_SOC_DAPM_MIXER_E(wname, wreg, wshift, winvert, wcontrols, \
 	wncontrols, wevent, wflags) \
 {	.id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
@@ -368,6 +377,7 @@ enum snd_soc_dapm_type {
 	snd_soc_dapm_mixer,			/* mixes several analog signals together */
 	snd_soc_dapm_mixer_named_ctl,		/* mixer with named controls */
 	snd_soc_dapm_pga,			/* programmable gain/attenuation (volume) */
+	snd_soc_dapm_out_drv,			/* output driver */
 	snd_soc_dapm_adc,			/* analog to digital converter */
 	snd_soc_dapm_dac,			/* digital to analog converter */
 	snd_soc_dapm_micbias,		/* microphone bias (power) */

sound/soc/soc-dapm.c

@@ -62,6 +62,7 @@ static int dapm_up_seq[] = {
 	[snd_soc_dapm_mixer_named_ctl] = 7,
 	[snd_soc_dapm_pga] = 8,
 	[snd_soc_dapm_adc] = 9,
+	[snd_soc_dapm_out_drv] = 10,
 	[snd_soc_dapm_hp] = 10,
 	[snd_soc_dapm_spk] = 10,
 	[snd_soc_dapm_post] = 11,
@@ -72,6 +73,7 @@ static int dapm_down_seq[] = {
 	[snd_soc_dapm_adc] = 1,
 	[snd_soc_dapm_hp] = 2,
 	[snd_soc_dapm_spk] = 2,
+	[snd_soc_dapm_out_drv] = 2,
 	[snd_soc_dapm_pga] = 4,
 	[snd_soc_dapm_mixer_named_ctl] = 5,
 	[snd_soc_dapm_mixer] = 5,
@@ -235,6 +237,7 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
 	break;
 	/* does not effect routing - always connected */
 	case snd_soc_dapm_pga:
+	case snd_soc_dapm_out_drv:
 	case snd_soc_dapm_output:
 	case snd_soc_dapm_adc:
 	case snd_soc_dapm_input:
@@ -1250,6 +1253,7 @@ static ssize_t dapm_widget_show(struct device *dev,
 		case snd_soc_dapm_dac:
 		case snd_soc_dapm_adc:
 		case snd_soc_dapm_pga:
+		case snd_soc_dapm_out_drv:
 		case snd_soc_dapm_mixer:
 		case snd_soc_dapm_mixer_named_ctl:
 		case snd_soc_dapm_supply:
@@ -1428,6 +1432,7 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
 	case snd_soc_dapm_adc:
 	case snd_soc_dapm_dac:
 	case snd_soc_dapm_pga:
+	case snd_soc_dapm_out_drv:
 	case snd_soc_dapm_input:
 	case snd_soc_dapm_output:
 	case snd_soc_dapm_micbias:
@@ -1545,6 +1550,7 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
 			w->power_check = dapm_dac_check_power;
 			break;
 		case snd_soc_dapm_pga:
+		case snd_soc_dapm_out_drv:
 			w->power_check = dapm_generic_check_power;
 			dapm_new_pga(dapm, w);
 			break;