dmub_shared_state_ips_driver_signals
union dmub_shared_state_ips_driver_signals new_signals;
union dmub_shared_state_ips_driver_signals prev_driver_signals = ips_driver->signals;
union dmub_shared_state_ips_driver_signals driver_signals;
union dmub_shared_state_ips_driver_signals signals; /**< 4 bytes, IPS signal bits */