commit bc13018b5eba26ca229b33763c9e61fac31a1925
author Alex Deucher <alexander.deucher@amd.com> Tue Sep 16 20:57:26 2014 -0400
committer Alex Deucher <alexander.deucher@amd.com> Mon Sep 22 17:24:27 2014 -0400
tree ac2c4585da2e7cfe7e31dfff6e7478cb2a6160ff
parent f55e03b975c230758c8f164347dfa10103f60e2c

drm/radeon: add a module parameter for backlight control (v2)

Add a module parameter to disable the radeon GPU backlight
controller to override the automatic detection.  Some
laptops seems to indicate that they use the integrated
controller, but appear to actually use an external
controller.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=81382

v2: fix module parameter description

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon.h

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 5f05b4c..3247bfd 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -106,6 +106,7 @@
 extern int radeon_deep_color;
 extern int radeon_use_pflipirq;
 extern int radeon_bapm;
+extern int radeon_backlight;
 
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting