drm/i915: Avoid underruns when disabling sprites

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As the watermark registers aren't double bufferd, clearing the
watermarks immediately after writing the sprite registers can be
hazardous.

Until we have something better, add a wait for vblank between the
two steps to make sure the sprite no longer needs the watermark
levels before we clear them.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2013-12-05 15:51:41 +02:00 • committed by Daniel Vetter

parent efb31d15dc

commit 1bd09ec7ad

1 changed files with 12 additions and 0 deletions

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drivers/gpu/drm/i915/intel_sprite.c

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