Cull distances are just a special case of clip distances as far as the hardware is concerned. Make sure that the relevant "planes" are enabled, and flip the clip mode to cull for those. Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> [imirkin: add enables on nvc0, add nv50 support] Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>