From 0d204c34e85d1d63e5fdd3e3192747daf0ee7ec1 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Tue, 15 Dec 2009 21:51:11 -0200 Subject: thinkpad-acpi: basic ALSA mixer support (v2) Add the basic ALSA mixer functionality. The mixer is event-driven, and will work fine on IBM ThinkPads. I expect Lenovo ThinkPads will cause some trouble with the event interface. Heavily based on work by Lorne Applebaum and ideas from Matthew Garrett . Signed-off-by: Henrique de Moraes Holschuh Cc: Lorne Applebaum Cc: Matthew Garrett Signed-off-by: Len Brown --- Documentation/laptops/thinkpad-acpi.txt | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'Documentation/laptops/thinkpad-acpi.txt') diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index 6a5814330e51..b4ed30cb1375 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt @@ -1096,6 +1096,7 @@ Volume control -------------- procfs: /proc/acpi/ibm/volume +ALSA: "ThinkPad Console Audio Control", default ID: "ThinkPadEC" NOTE: by default, the volume control interface operates in read-only mode, as it is supposed to be used for on-screen-display purposes. @@ -1144,9 +1145,8 @@ The driver will operate in volume_mode=3 by default. If that does not work well on your ThinkPad model, please report this to ibm-acpi-devel@lists.sourceforge.net. -The ALSA mixer interface to this feature is still missing, but patches -to add it exist. That problem should be addressed in the not so -distant future. +The driver supports the standard ALSA module parameters. If the ALSA +mixer is disabled, the driver will disable all volume functionality. Fan control and monitoring: fan speed, fan enable/disable @@ -1478,3 +1478,4 @@ Sysfs interface changelog: 0x020700: Support for mute-only mixers. Volume control in read-only mode by default. + Marker for ALSA mixer support. -- cgit v1.2.1