drm/i915: disable stolen mem for OVERLAY_NEEDS_PHYSICAL
Our phys_object code can't deal with stolen memory and so blows up. Fixing this is quite a bit of work and not worth it much for a single page object, so just opt-out. This is necessary prep work to enable stolen on gen2/3 platforms where the overlay register file isn't stored in the gtt. Cc: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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