[PATCH v6 7/9] drm/i915: Restore brightness level in aux backlight driver

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Some panel will default to zero brightness when turning the
panel off and on again. This patch restores last brightness
level back when panel is turning back on.

Signed-off-by: Puthikorn Voravootivat <puthik@xxxxxxxxxxxx>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
index 7d323af96636..fc26fea94fd4 100644
--- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
@@ -158,6 +158,7 @@ static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
 	}
 
 	set_aux_backlight_enable(intel_dp, true);
+	intel_dp_aux_set_backlight(connector, connector->panel.backlight.level);
 }
 
 static void intel_dp_aux_disable_backlight(struct intel_connector *connector)
-- 
2.13.0.rc2.291.g57267f2277-goog

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