bxt_initial_pps_idx
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_has_pp_on);
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_has_vdd_on);
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_any);