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This gets rid of the bespoke vfunc interface in the WSI code. Eventually, I'd love to get rid of wsi_display_fence entirely but this at least makes it a lot more palatable. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13427>