drm/i915: add debug logging to ASLE backlight set requests
Make it easier to track backlight set requests coming through ASLE instead
of the driver's own backlight sysfs interface. We've had enough of
backlight issues to warrant some extra debug logs in the area.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index e27c170..0f2db16 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -154,6 +154,8 @@
struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
u32 max;
+ DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
+
if (!(bclp & ASLE_BCLP_VALID))
return ASLE_BACKLIGHT_FAILED;