I've almost forgot one during my Allwinner garden tour : Pinebook-A64 !
Unfortunately, it seems that 5.8.y is broken somehow, the screen doesn't work after "starting kernel" ...
It is not a DT issue, since I've tried to exchange DTB with my previous 5.7.6, so it must be in kernel binary.
If someone else have time to test, I will be glad to get help to figure what is broken.