drm/i915: Ironlake shares the same video sprite controls as Sandybridge
Well, almost. Just a couple of differences, Ironlake lacks a few of the RGB formats, only exposing x8r8g8b8, and lacks a couple of unused features. Given the similarities, we can then reuse the same routines as already written for Sandybridge to enable overlay support for Ironlake as well. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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