[ALSA] Add description about spdif_aclink option for snd-intel8x0

Added a description about spdif_aclink option for snd-intel8x0 driver
in ALSA-Configuration.txt.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 15d102a94619..89b612f835ad 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1079,6 +1079,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     buggy_semaphore - Enable workaround for hardwares with buggy
                     semaphores (e.g. on some ASUS laptops)
                     (default off)
+    spdif_aclink  - Use S/PDIF over AC-link instead of direct connection
+                    from the controller chip
+                    (0 = off, 1 = on, -1 = default)
 
     This module supports one chip and autoprobe.