drm/i915: Eliminate lots of WARNs when there's no backlight present

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My 855gm doesn't register the intel backlight but it still ends up
calling the backlight code to enable/disable the backlight via the
LVDS code. This leads to some WARNs due to backlight.max being 0.

Let's have intel_panel_enable_backlight() and intel_panel_disable_backlight()
check whether there's a backlight present or not.

Also move the backlight.present check from asle_set_backlight() into
intel_panel_set_backlight() for some extra symmetry.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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This commit is contained in:

Ville Syrjälä 2014-01-16 18:27:15 +02:00 • committed by Daniel Vetter

parent bfbdb420f5

commit dc5a43636c

2 changed files with 5 additions and 11 deletions

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10

drivers/gpu/drm/i915/intel_opregion.c

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6

drivers/gpu/drm/i915/intel_panel.c

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