ALSA: hda - add dock support for Thinkpad X230 Tablet

Also add a model/fixup string "lenovo-dock", so that other Thinkpad
users will be able to test this fixup easily, to see if it enables
dock I/O for them as well.

Cc: stable@kernel.org
BugLink: https://bugs.launchpad.net/bugs/1026953
Tested-by: John McCarron <john.mccarron@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/Documentation/sound/alsa/HD-Audio-Models.txt b/Documentation/sound/alsa/HD-Audio-Models.txt
index 2ea8cf2819cf..7456360e161c 100644
--- a/Documentation/sound/alsa/HD-Audio-Models.txt
+++ b/Documentation/sound/alsa/HD-Audio-Models.txt
@@ -21,13 +21,14 @@ ALC267/268
 ==========
   inv-dmic      Inverted internal mic workaround
 
-ALC269
+ALC269/270/275/276/280/282
 ======
   laptop-amic   Laptops with analog-mic input
   laptop-dmic   Laptops with digital-mic input
   alc269-dmic   Enable ALC269(VA) digital mic workaround
   alc271-dmic   Enable ALC271X digital mic workaround
   inv-dmic      Inverted internal mic workaround
+  lenovo-dock   Enables docking station I/O for some Lenovos
 
 ALC662/663/272
 ==============