[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>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index a0c290cef763..314ea51538b7 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3721,6 +3721,8 @@ static int patch_stac927x(struct hda_codec *codec)
                 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 */