nvkm_ior_find
struct nvkm_ior *nvkm_ior_find(struct nvkm_disp *, enum nvkm_ior_type, int id);
ior = nvkm_ior_find(disp, SOR, ffs(outp->info.or) - 1);
ior = nvkm_ior_find(outp->disp, SOR, ffs(outp->info.or) - 1);
ior = nvkm_ior_find(disp, type, -1);
ior = nvkm_ior_find(disp, type, id);
ior = nvkm_ior_find(disp, SOR, or);
ior = nvkm_ior_find(disp, SOR, id);