[aseipp]

The CIX CP8180 uses UEFI (it is intended to boot Windows which requires it) but the boot flow can, I believe, use either ACPI or device trees, based on a boot setting. The ACPI boot flow has the advantage that any normal Linux distro should work, while the device tree variant I think has more hardware enablement.

The upstream story due to this is kind of a mixed bag, though. I think they also still use out-of-tree NPU drivers, etc. Device trees and other updates are still flowing upstream. I think the next Mesa release will support the Immortalis GPU series though, so that'll hopefully polish off a big remaining problem with ordinary distros.