tree 688f07e2ba0dd22dffb265dbb3b9bdbc818bc5a5
parent 329e4e18dfdc552f36b0642a3de5ebfa96063666
author Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1260921069 -0200
committer Len Brown <len.brown@intel.com> 1260939446 -0500

thinkpad-acpi: support MUTE-only ThinkPads

Lenovo removed the extra mixer since the T61 and thereabouts.
Newer Lenovo models only have the mute gate function, and leave
the volume control to the HDA mixer.

Until a way to automatically query the firmware about its audio
control capabilities is discovered (there might not be any), use a
white/black list.

We will likely need to ask T60 (old and new model) and Z60/Z61 users
whether they have volume control to populate the black/white list.
Meanwhile, provide a volume_capabilities parameter that can be used to
override the defaults.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Lorne Applebaum <lorne.applebaum@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>