Starting from the official LE-12.2 (latest today), I was able to port ilmich 's le12-rk322x-wip on the latest. Had to remove a couple of the RTL81xx drivers as they were not easy to compile on latest kernel, but re-enabled 8723CS so my T95d box has wifi again!
There's probably more to tidy up, but I've aimed at maintaining all RK3xxx there (not tested).
Attached: git diff official/libreelec-12.2 HEAD