Ok, I've been through a lot kernels and had various problems. None them worked for various reasons.
Im now at 6.2.0-rc8 and for whatever reason I can build the modules now, and our solution works out of the box.
Make install in my
armbian-boot-edp-overlay repository,
then make install in @iamdrq's
panel-edp-friendlyelec repo.
Reboot.
The ts1050 edp panel should work.