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drm/i915: Only pwrite through the GTT if there is space in the aperture

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Avoid stalling and waiting for the GPU by checking to see if there is
sufficient inactive space in the aperture for us to bind the buffer
prior to writing through the GTT. If there is inadequate space we will
have to stall waiting for the GPU, and incur overheads moving objects
about. Instead, only incur the clflush overhead on the target object by
writing through shmem.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2012-08-11 15:41:04 +01:00
committed by Daniel Vetter
parent 53621860c3
commit 86a1ee26bb
8 changed files with 33 additions and 24 deletions
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2
drivers/gpu/drm/i915/intel_overlay.c
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@@ -1383,7 +1383,7 @@ void intel_setup_overlay(struct drm_device *dev)
}
overlay->flip_addr = reg_bo->phys_obj->handle->busaddr;
} else {
ret = i915_gem_object_pin(reg_bo, PAGE_SIZE, true);
ret = i915_gem_object_pin(reg_bo, PAGE_SIZE, true, false);
if (ret) {
DRM_ERROR("failed to pin overlay register bo\n");
goto out_free_bo;