Topping D90SE USB not working with Pi4

[Tim Curtis]

Try bumping the kernel.

The command below installs latest kernel committed to the Pi firmware repo and automatically deletes old kernel modules so some disk space can be reclaimed.

Code:

sudo PRUNE_MODULES=1 rpi-update

Heres some useful links.
https://github.com/raspberrypi/rpi-firmw...its/master
https://github.com/raspberrypi/rpi-update