ALSA: hda - Fix codec muted after rebooting from Windows

Windows may leave pin power-down registers set after reboot, and
this resulted in muted output on Linux.  Reset these registers
at initialization properly.

Signed-off-by: Charles Chin <Charles.Chin@idt.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 1a563a2fbbec..7d70f8ca3742 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -5334,6 +5334,9 @@ static int patch_stac92hd83xxx(struct hda_codec *codec)
         if (spec == NULL)
                 return -ENOMEM;
 
+        /* reset pin power-down; Windows may leave these bits after reboot */
+        snd_hda_codec_write_cache(codec, codec->afg, 0, 0x7EC, 0);
+        snd_hda_codec_write_cache(codec, codec->afg, 0, 0x7ED, 0);
         codec->no_trigger_sense = 1;
         codec->spec = spec;
         spec->linear_tone_beep = 1;