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drm/i915: add debug logging to ASLE backlight set requests

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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>
This commit is contained in:
Jani Nikula 2012-10-01 14:25:30 +03:00 committed by Daniel Vetter
parent 17dc92574b
commit 749052fba6
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_opregion.c
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@ -154,6 +154,8 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
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;