tree b03899037a65963c8e1ac686eecb11c30fff8d47
parent 0ac66effe7fcdee55bda6d5d10d3372c95a41920
author Alex Deucher <alexander.deucher@amd.com> 1405432133 -0400
committer Alex Deucher <alexander.deucher@amd.com> 1405602090 -0400

drm/radeon: set default bl level to something reasonable

If the value in the scratch register is 0, set it to the
max level.  This fixes an issue where the console fb blanking
code calls back into the backlight driver on unblank and then
sets the backlight level to 0 after the driver has already
set the mode and enabled the backlight.

bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=81382
https://bugs.freedesktop.org/show_bug.cgi?id=70207

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
Cc: stable@vger.kernel.org