[ALSA] hda: STAC927x analog mic
Some laptops have a internal analog microphone that is not setup by the BIOS.
Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
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 a0c290c..314ea51 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3721,6 +3721,8 @@
spec->mixer = stac927x_mixer;
break;
case STAC_DELL_BIOS:
+ /* configure the analog microphone on some laptops */
+ stac92xx_set_config_reg(codec, 0x0c, 0x90a79130);
/* correct the front output jack as a hp out */
stac92xx_set_config_reg(codec, 0x0f, 0x0227011f);
/* correct the front input jack as a mic */