I915_GGTT_VIEW_ROTATED
vma->ggtt_view.type = I915_GGTT_VIEW_ROTATED; /* prevent fencing */
case I915_GGTT_VIEW_ROTATED:
} else if (view->type == I915_GGTT_VIEW_ROTATED) {
if (vma->ggtt_view.type == I915_GGTT_VIEW_ROTATED)
BUILD_BUG_ON(I915_GGTT_VIEW_PARTIAL >= I915_GGTT_VIEW_ROTATED);
view->type = I915_GGTT_VIEW_ROTATED;