TYPEC_TBT_MODE
port->state.mode = TYPEC_TBT_MODE;
alt_port->tbt_alt.mode = TYPEC_TBT_MODE;
cd321x->state.mode == TYPEC_TBT_MODE)
cd321x->state.mode = TYPEC_TBT_MODE;
tbt->header |= VDO_OPOS(TYPEC_TBT_MODE);
tbt->header |= VDO_OPOS(TYPEC_TBT_MODE);