ALSA: hda - Add headphone automute support for 3stack-hp model (ALC888)

Mute speaker outputs on headphone insertion for machines that use
3stack-hp model.

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -8056,16 +8056,42 @@ static struct hda_verb alc888_lenovo_sky_verbs[] = {
 	{ } /* end */
 };
 
+static struct hda_verb alc888_6st_dell_verbs[] = {
+	{0x1b, AC_VERB_SET_UNSOLICITED_ENABLE, ALC880_HP_EVENT | AC_USRSP_EN},
+	{ }
+};
+
+static void alc888_3st_hp_front_automute(struct hda_codec *codec)
+{
+	unsigned int present, bits;
+
+	present = snd_hda_codec_read(codec, 0x1b, 0,
+			AC_VERB_GET_PIN_SENSE, 0) & 0x80000000;
+	bits = present ? HDA_AMP_MUTE : 0;
+	snd_hda_codec_amp_stereo(codec, 0x14, HDA_OUTPUT, 0,
+				 HDA_AMP_MUTE, bits);
+	snd_hda_codec_amp_stereo(codec, 0x16, HDA_OUTPUT, 0,
+				 HDA_AMP_MUTE, bits);
+	snd_hda_codec_amp_stereo(codec, 0x18, HDA_OUTPUT, 0,
+				 HDA_AMP_MUTE, bits);
+}
+
+static void alc888_3st_hp_unsol_event(struct hda_codec *codec,
+				      unsigned int res)
+{
+	switch (res >> 26) {
+	case ALC880_HP_EVENT:
+		alc888_3st_hp_front_automute(codec);
+		break;
+	}
+}
+
 static struct hda_verb alc888_3st_hp_verbs[] = {
 	{0x14, AC_VERB_SET_CONNECT_SEL, 0x00},	/* Front: output 0 (0x0c) */
 	{0x16, AC_VERB_SET_CONNECT_SEL, 0x01},	/* Rear : output 1 (0x0d) */
 	{0x18, AC_VERB_SET_CONNECT_SEL, 0x02},	/* CLFE : output 2 (0x0e) */
-	{ }
-};
-
-static struct hda_verb alc888_6st_dell_verbs[] = {
 	{0x1b, AC_VERB_SET_UNSOLICITED_ENABLE, ALC880_HP_EVENT | AC_USRSP_EN},
-	{ }
+	{ } /* end */
 };
 
 /*
@@ -8950,6 +8976,8 @@ static struct alc_config_preset alc883_presets[] = {
 		.channel_mode = alc888_3st_hp_modes,
 		.need_dac_fix = 1,
 		.input_mux = &alc883_capture_source,
+		.unsol_event = alc888_3st_hp_unsol_event,
+		.init_hook = alc888_3st_hp_front_automute,
 	},
 	[ALC888_6ST_DELL] = {
 		.mixers = { alc883_base_mixer, alc883_chmode_mixer },