Hi.
We(me+Ichernev) are currently messing around mainline kernel on Snapdragon 662.
We are going to submit some base stuff pretty soon depending how maintainers will go on merging simple compatibles.
However we are working on other devices, Redmi 9T(me) and Oneplus N100(Ichernev).
While progress is going to be slow we will get there at some point, one of harder things will be Adreno 610 support due to no GMU but i hope this will be done by SoMainline for 665 SoC so we just can pick it.