search for: nouveau_vp3_debug_fence

As it turns out, with the proprietary firmware, the VP3 and VP4 interfaces are identical. Furthermore, this is all already implemented for nvc0. So these patches (a) move the easily sharable bits of the nvc0 implementation into the nouveau directory, and then (b) implement the other parts in nv50. The non-shared parts are still largely copies, but there are some differences, not the least of which

Apparently, this hang can be fixed at small performance cost by setting NOUVEAU_VP3_DEBUG_FENCE 1 (as opposed to default 0) in https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/drivers/nouveau/nouveau_vp3_video.h Now, what exactly fixes my hangs (or make them less severe) - still open question, guess I can flip few of those debug defines and try to find out ... Currently at mesa Mesa...