tree 767bdbce5e87fa69e7a8c92df814c94249e8717c
parent 2a7aceecf15a463ba6bfa83b6579e75bb4703cd9
author Jani Nikula <jani.nikula@intel.com> 1365769116 +0300
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1366891627 +0200

drm/i915: keep max backlight internal to intel_panel.c

In preparation of adding locking to backlight, make max backlight value
(the modulation frequency the PWM duty cycle value must not exceed)
internal to intel_panel.c.

Have intel_panel_set_backlight() accept a caller defined range for level,
and scale input to max backlight value internally.

Clean up intel_panel_get_max_backlight() and usage internally.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>