@lej40 The DP interface cannot be configured as a USB3.1 interface. If two USB3.1 interfaces are not enough, it can be extended by using an external USB HUB. Two USB2.0 connectors are reserved on the back of the CP4 machine for users to use.
@大法师 Many thanks for your reply, but unoccupied serial ports accessible from GPIOs include uart3,6. There left only uart6 if uart3 can't be functional. Is it possible to activate uart3-m2-xfer?