ALSA: hda/realtek - Improve the signel-connection check

When the connections from the pin selector contain only two
widgets, a route to DAC and the aa-mixer, it's certainly a
single connection.  In such a case, get_dac_if_single() should
return the connected DAC, too.

This will improve the detection of the individual DAC
assignment for each pin.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 0ffccc178957..a5697c3b30b8 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2972,8 +2972,12 @@ static bool alc_auto_is_dac_reachable(struct hda_codec *codec,
 
 static hda_nid_t get_dac_if_single(struct hda_codec *codec, hda_nid_t pin)
 {
+        struct alc_spec *spec = codec->spec;
         hda_nid_t sel = alc_go_down_to_selector(codec, pin);
-        if (snd_hda_get_conn_list(codec, sel, NULL) == 1)
+        hda_nid_t srcs[5];
+        int num = snd_hda_get_connections(codec, sel, srcs,
+                                          ARRAY_SIZE(srcs));
+        if (num == 1 || (num == 2 && srcs[1] == spec->mixer_nid))
                 return alc_auto_look_for_dac(codec, pin);
         return 0;
 }