PORT_TX_DFLEXDPSP
lane_mask = intel_de_read(display, PORT_TX_DFLEXDPSP(tc->phy_fia));
fia_isr = intel_de_read(display, PORT_TX_DFLEXDPSP(tc->phy_fia));
val = intel_de_read(display, PORT_TX_DFLEXDPSP(FIA1));