ALSA: hda - Fix line-in on Mac Mini Core2 Duo

BIOS on Mac Mini Core2 Duo sets both INPUT and OUTPUT pinctl bits to
the line-in jack, and it confuses the driver as if it's a valid input.
This patch adds the check of OUTPUT bit so that the driver fixes the
invalid pin setup.

Tested-by: Tino Keitel <tino.keitel@gmx.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 917bc5d..03b3646 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4079,7 +4079,12 @@ static int stac92xx_init(struct hda_codec *codec)
                                pinctl = snd_hda_codec_read(codec, nid, 0,
                                        AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
                                /* if PINCTL already set then skip */
-                               if (!(pinctl & AC_PINCTL_IN_EN)) {
+                               /* Also, if both INPUT and OUTPUT are set,
+                                * it must be a BIOS bug; need to override, too
+                                */
+                               if (!(pinctl & AC_PINCTL_IN_EN) ||
+                                   (pinctl & AC_PINCTL_OUT_EN)) {
+                                       pinctl &= ~AC_PINCTL_OUT_EN;
                                        pinctl |= AC_PINCTL_IN_EN;
                                        stac92xx_auto_set_pinctl(codec, nid,
                                                                 pinctl);