ALSA: hda/realtek - Fix initialization of input amps in output paths

When initializing the output paths, we assumed the input amps have
almost two inputs blindly.  It's not only generic but even incorrect
for some codecs like ALC268 & co.  Also, the same assumption (two
sources) exists for the bind input-amp controls.

This patch changes the codes in these places to handle the input
connections in a more generic way.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -3621,9 +3621,10 @@ static int alc_auto_add_sw_ctl(struct hda_codec *codec,
 	val = amp_val_replace_channels(val, chs);
 	if (get_amp_direction_(val) == HDA_INPUT) {
 		hda_nid_t nid = get_amp_nid_(val);
-		if (snd_hda_get_num_conns(codec, nid) > 1) {
+		int nums = snd_hda_get_num_conns(codec, nid);
+		if (nums > 1) {
 			type = ALC_CTL_BIND_MUTE;
-			val |= 2 << 19; /* FIXME: fixed two widgets, so far */
+			val |= nums << 19;
 		}
 	}
 	return __add_pb_sw_ctrl(codec->spec, type, pfx, cidx, val);
@@ -3909,6 +3910,7 @@ static void alc_auto_set_output_and_unmute(struct hda_codec *codec,
 					   hda_nid_t pin, int pin_type,
 					   hda_nid_t dac, bool force)
 {
+	struct alc_spec *spec = codec->spec;
 	int i, val;
 	struct nid_path *path;
 
@@ -3928,13 +3930,19 @@ static void alc_auto_set_output_and_unmute(struct hda_codec *codec,
 		    (get_wcaps(codec, nid) & AC_WCAP_IN_AMP) &&
 		    (force || !is_out_ctl_present(codec, path, nid,
 						  HDA_INPUT))) {
+			hda_nid_t conn[16];
+			int n, nums;
+			nums = snd_hda_get_connections(codec, nid, conn,
+						       ARRAY_SIZE(conn));
 			val = get_default_amp_val(codec, nid, HDA_INPUT);
-			snd_hda_codec_write(codec, nid, 0,
-					    AC_VERB_SET_AMP_GAIN_MUTE,
-					    AMP_IN_UNMUTE(0) | val);
-			snd_hda_codec_write(codec, nid, 0,
+			for (n = 0; n < nums; n++) {
+				if (n != path->idx[i] &&
+				    conn[n] != spec->mixer_nid)
+					continue;
+				snd_hda_codec_write(codec, nid, 0,
 					    AC_VERB_SET_AMP_GAIN_MUTE,
-					    AMP_IN_UNMUTE(1) | val);
+					    AMP_IN_UNMUTE(n) | val);
+			}
 		}
 		if ((get_wcaps(codec, nid) & AC_WCAP_OUT_AMP) &&
 		    (force || !is_out_ctl_present(codec, path, nid,