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drm/i915: clarify gen2 pageflip cmd

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I've reviewed gen2 pageflip code to hunt down multiple prepare pageflip
issues. The only thing I've found is a slight but functionally
meaningless confusion about the length of the mi cmd.

Fix it up and add a comment about what this dword should be (according
to docs at least).

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-01-20 10:43:44 +01:00
parent 3d29b842e5
commit c6a32fcbbb
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -7288,7 +7288,7 @@ static int intel_gen2_queue_flip(struct drm_device *dev,
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitches[0]);
OUT_RING(obj->gtt_offset + offset);
OUT_RING(MI_NOOP);
OUT_RING(0); /* aux display base address, unused */
ADVANCE_LP_RING();
out:
return ret;