Here you can find the guide:
https://forum.xda-developers.com/t/h...-9-10.4497965/
What we still need, is to make the e-ink panel refresh at maximum speed.
We could port the stock chinese rom "display modes" as described, or just make android interact the way it should with the e-ink display!
How to lock the e-ink display refresh rate at maximum speed?
If anyone interested in helping here
https://forum.xda-developers.com/t/h...-aosp.4497903/