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drm/radeon: implement handler for ACPI event

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Set up an handler for ACPI events and respond to brightness change
requests from the system BIOS.
v2: fix notification when using device-specific command codes
(tested by Pali Rohár <pali.rohar@gmail.com>); cache the encoder
controlling the backlight during the initialization to avoid searching
it every time (suggested by Alex Deucher).
v3: whitespace fixes (Alex Deucher).

Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luca Tettamanti
2012-07-30 21:20:35 +02:00
committed by Alex Deucher
parent ce3cf821a3
commit fda4b25c55
7 changed files with 152 additions and 11 deletions
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6
drivers/gpu/drm/radeon/radeon_acpi.h
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@@ -24,6 +24,12 @@
#ifndef RADEON_ACPI_H
#define RADEON_ACPI_H
struct radeon_device;
struct acpi_bus_event;
int radeon_atif_handler(struct radeon_device *rdev,
struct acpi_bus_event *event);
/* AMD hw uses four ACPI control methods:
* 1. ATIF
* ARG0: (ACPI_INTEGER) function code