ALSA: hda - Add 4 channel mode for 3stack-hp model (ALC888)

Add additional 4 channel mode for 3stack-hp models.
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -8068,24 +8068,45 @@ static struct hda_verb alc888_6st_dell_verbs[] = {
 	{ }
 };
 
+/*
+ * 2ch mode
+ */
 static struct hda_verb alc888_3st_hp_2ch_init[] = {
 	{ 0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80 },
 	{ 0x18, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE },
 	{ 0x16, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_IN },
 	{ 0x16, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE },
-	{ }
+	{ } /* end */
 };
 
+/*
+ * 4ch mode
+ */
+static struct hda_verb alc888_3st_hp_4ch_init[] = {
+	{ 0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80 },
+	{ 0x18, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE },
+	{ 0x16, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT },
+	{ 0x16, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE },
+	{ 0x16, AC_VERB_SET_CONNECT_SEL, 0x01 },
+	{ } /* end */
+};
+
+/*
+ * 6ch mode
+ */
 static struct hda_verb alc888_3st_hp_6ch_init[] = {
 	{ 0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT },
 	{ 0x18, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE },
+	{ 0x18, AC_VERB_SET_CONNECT_SEL, 0x02 },
 	{ 0x16, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT },
 	{ 0x16, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE },
-	{ }
+	{ 0x16, AC_VERB_SET_CONNECT_SEL, 0x01 },
+	{ } /* end */
 };
 
-static struct hda_channel_mode alc888_3st_hp_modes[2] = {
+static struct hda_channel_mode alc888_3st_hp_modes[3] = {
 	{ 2, alc888_3st_hp_2ch_init },
+	{ 4, alc888_3st_hp_4ch_init },
 	{ 6, alc888_3st_hp_6ch_init },
 };