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drm/i915: switch off backlight for backlight class 0 brightness 

Make backlight class sysfs brightness 0 value switch off the backlight
for connectors that have the backlight_power callback defined. For eDP,
this has the similar caveats regarding power savings as bl_power as only
the power sequencer backlight control is switched off.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed_by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Jani Nikula 2014-08-12 17:11:42 +03:00 committed by Daniel Vetter
parent 73580fb764
commit e6755fb78e
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_panel.c
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@ -986,7 +986,8 @@ static int intel_backlight_device_update_status(struct backlight_device *bd)
*/
if (panel->backlight.enabled) {
if (panel->backlight_power) {
bool enable = bd->props.power == FB_BLANK_UNBLANK;
bool enable = bd->props.power == FB_BLANK_UNBLANK &&
bd->props.brightness != 0;
panel->backlight_power(connector, enable);
}
} else {