intel_sst: Headphone Automute support

When detected a Jack event, Audio sound routes between internal speaker
and headphone/headset automatically.

Signed-off-by: xingchao <xingchao.wang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/intel_sst/intelmid_v2_control.c

@@ -995,6 +995,19 @@ static int nc_get_vol(int dev_id, int *value)
 	return retval;
 }
 
+static void hp_automute(enum snd_jack_types type, int present)
+{
+	u8 in = DMIC;
+	u8 out = INTERNAL_SPKR;
+	if (present) {
+		if (type == SND_JACK_HEADSET)
+			in = HS_MIC;
+		out = STEREO_HEADPHONE;
+	}
+	nc_set_selected_input_dev(in);
+	nc_set_selected_output_dev(out);
+}
+
 static void nc_pmic_irq_cb(void *cb_data, u8 intsts)
 {
 	u8 value = 0;
@@ -1015,6 +1028,7 @@ static void nc_pmic_irq_cb(void *cb_data, u8 intsts)
 		present = (value == 0x1) ? 1 : 0;
 		jack_event_flag = 1;
 		mjack->jack.type = SND_JACK_HEADSET;
+		hp_automute(SND_JACK_HEADSET, present);
 	}
 
 	if (intsts & 0x2) {
@@ -1023,6 +1037,7 @@ static void nc_pmic_irq_cb(void *cb_data, u8 intsts)
 		present = (value == 0x2) ? 1 : 0;
 		jack_event_flag = 1;
 		mjack->jack.type = SND_JACK_HEADPHONE;
+		hp_automute(SND_JACK_HEADPHONE, present);
 	}
 
 	if (intsts & 0x4) {