nvkm_head_find
struct nvkm_head *head = nvkm_head_find(disp, id);
struct nvkm_head *head = nvkm_head_find(disp, id);
struct nvkm_head *nvkm_head_find(struct nvkm_disp *, int id);
struct nvkm_head *head = nvkm_head_find(ior->disp, __ffs(state->head));
if (!(head = nvkm_head_find(disp, args->v0.id)))
if (!ior->hda || !nvkm_head_find(outp->disp, args->v0.head))
if (!nvkm_head_find(outp->disp, args->v0.head))
if (!(outp->asy.head = nvkm_head_find(outp->disp, args->v0.head)))
if (!ior->func->dp || !ior->func->dp->vcpi || !nvkm_head_find(outp->disp, args->v0.head))
if (!ior->func->dp || !nvkm_head_find(disp, args->v0.head))