We try to preserve the backlight brightness across backlight
disable/enable, except for minimum brightness. Currently, if the
backlight is at minimum, we crank the backlight to max on
enable. Preserve the minimum too, and turn the code into a sanity check
instead.
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Clint Taylor <clinton.a.taylor@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_panel.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index a24df35e11e7..7ab63486adce 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1116,8 +1116,9 @@ void intel_panel_enable_backlight(struct intel_connector *connector)
WARN_ON(panel->backlight.max == 0);
- if (panel->backlight.level <= panel->backlight.min) {
- panel->backlight.level = panel->backlight.max;
+ if (panel->backlight.level < panel->backlight.min) {
+ DRM_DEBUG_KMS("backlight level was below minimum\n");
+ panel->backlight.level = panel->backlight.min;
if (panel->backlight.device)
panel->backlight.device->props.brightness =
scale_hw_to_user(connector,
--
2.1.4
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