GT214_DISP_OVERLAY
{ GT214_DISP_OVERLAY, 0, oimm507b_init },
{{0,0,GT214_DISP_OVERLAY }, nvkm_disp_chan_new, & nv50_disp_oimm },
{{0,0,GT214_DISP_OVERLAY }, nvkm_disp_chan_new, &nv50_disp_oimm },