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drm/i915/overlay: Ensure that the reg_bo is in the GTT prior to writing.

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Just makes sure that writes are not being aliased by the CPU cache and
do make it out to main memory.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=24977
Cc: stable@kernel.org
This commit is contained in:
Chris Wilson 2010-08-12 09:35:00 +01:00
parent 6ba3ddd983
commit 0ddc1289f3
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/i915/intel_overlay.c
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@ -1386,6 +1386,12 @@ void intel_setup_overlay(struct drm_device *dev)
goto out_free_bo;
}
overlay->flip_addr = overlay->reg_bo->gtt_offset;
ret = i915_gem_object_set_to_gtt_domain(reg_bo, true);
if (ret) {
DRM_ERROR("failed to move overlay register bo into the GTT\n");
goto out_unpin_bo;
}
} else {
ret = i915_gem_attach_phys_object(dev, reg_bo,
I915_GEM_PHYS_OVERLAY_REGS,
@ -1418,6 +1424,8 @@ void intel_setup_overlay(struct drm_device *dev)
DRM_INFO("initialized overlay support\n");
return;
out_unpin_bo:
i915_gem_object_unpin(reg_bo);
out_free_bo:
drm_gem_object_unreference(reg_bo);
out_free: