dispc_ovl_set_mflag
dispc_ovl_set_mflag(dispc, i, true);
dispc_ovl_set_mflag(dispc, OMAP_DSS_WB, true);
dispc_ovl_set_mflag(i, true);
dispc_ovl_set_mflag(OMAP_DSS_WB, true);