ALSA: hda/realtek - Fix auto-mute with HP+LO configuration

When the system has only the headphone and the line-out jacks without
speakers, the current auto-mute code doesn't work.  It's because the
spec->automute_lines flag is wrongly referred in update_speakers().
This flag must be meaningless when spec->automute_hp_lo isn't set, thus
they should be always coupled.

The patch fixes the problem and add a comment to indicate the
relationship briefly.

BugLink: http://bugs.launchpad.net/bugs/851697

Reported-by: David Henningsson <david.henningsson@canonical.com>
Tested-By: Jayne Han <jayne.han@canonical.com>
Cc: stable@kernel.org (3.0)
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 4 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 7cabd731716..0503c999e7d 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -168,7 +168,7 @@ struct alc_spec {
         unsigned int auto_mic_valid_imux:1;     /* valid imux for auto-mic */
         unsigned int automute:1;        /* HP automute enabled */
         unsigned int detect_line:1;     /* Line-out detection enabled */
-        unsigned int automute_lines:1;  /* automute line-out as well */
+        unsigned int automute_lines:1;  /* automute line-out as well; NOP when automute_hp_lo isn't set */
         unsigned int automute_hp_lo:1;  /* both HP and LO available */
 
         /* other flags */
@@ -551,7 +551,7 @@ static void update_speakers(struct hda_codec *codec)
         if (spec->autocfg.line_out_pins[0] == spec->autocfg.hp_pins[0] ||
             spec->autocfg.line_out_pins[0] == spec->autocfg.speaker_pins[0])
                 return;
-        if (!spec->automute_lines || !spec->automute)
+        if (!spec->automute || (spec->automute_hp_lo && !spec->automute_lines))
                 on = 0;
         else
                 on = spec->jack_present;
@@ -803,7 +803,7 @@ static int alc_automute_mode_get(struct snd_kcontrol *kcontrol,
         unsigned int val;
         if (!spec->automute)
                 val = 0;
-        else if (!spec->automute_lines)
+        else if (!spec->automute_hp_lo || !spec->automute_lines)
                 val = 1;
         else
                 val = 2;
@@ -824,7 +824,8 @@ static int alc_automute_mode_put(struct snd_kcontrol *kcontrol,
                 spec->automute = 0;
                 break;
         case 1:
-                if (spec->automute && !spec->automute_lines)
+                if (spec->automute &&
+                    (!spec->automute_hp_lo || !spec->automute_lines))
                         return 0;
                 spec->automute = 1;
                 spec->automute_lines = 0;