[ALSA] hda: Added mono_out_pin to autoconfig

Added a mono_out_pin field to autocfg struct, and code to parse
for the mono_out_line.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/hda/hda_codec.c

@@ -2708,6 +2708,10 @@ int snd_hda_parse_pin_def_config(struct hda_codec *codec,
 		case AC_JACK_LINE_OUT:
 			seq = get_defcfg_sequence(def_conf);
 			assoc = get_defcfg_association(def_conf);
+
+			if (!(wid_caps & AC_WCAP_STEREO))
+				if (!cfg->mono_out_pin)
+					cfg->mono_out_pin = nid;
 			if (!assoc)
 				continue;
 			if (!assoc_line_out)
@@ -2856,6 +2860,7 @@ int snd_hda_parse_pin_def_config(struct hda_codec *codec,
 		   cfg->hp_outs, cfg->hp_pins[0],
 		   cfg->hp_pins[1], cfg->hp_pins[2],
 		   cfg->hp_pins[3], cfg->hp_pins[4]);
+	snd_printd("   mono: mono_out=0x%x\n", cfg->mono_out_pin);
 	snd_printd("   inputs: mic=0x%x, fmic=0x%x, line=0x%x, fline=0x%x,"
 		   " cd=0x%x, aux=0x%x\n",
 		   cfg->input_pins[AUTO_PIN_MIC],

sound/pci/hda/hda_local.h

@@ -332,6 +332,7 @@ struct auto_pin_cfg {
 	hda_nid_t input_pins[AUTO_PIN_LAST];
 	hda_nid_t dig_out_pin;
 	hda_nid_t dig_in_pin;
+	hda_nid_t mono_out_pin;
 };
 
 #define get_defcfg_connect(cfg) \