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>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 7cabd73..0503c99 100644 (file)
--- 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;