ALSA: Enable SPDIF output on ALC655

Some hardwares with ALC655 codec don't indicate the proper ext id bit
for SPDIF output although it supports.  Force to enable the bit.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 6e831aff1bd0..2c7cd97d2234 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -2832,6 +2832,8 @@ static int patch_alc655(struct snd_ac97 * ac97)
                         val &= ~(1 << 1); /* Pin 47 is EAPD (for internal speaker) */
                 else
                         val |= (1 << 1); /* Pin 47 is spdif input pin */
+                /* this seems missing on some hardwares */
+                ac97->ext_id |= AC97_EI_SPDIF;
         }
         val &= ~(1 << 12); /* vref enable */
         snd_ac97_write_cache(ac97, 0x7a, val);