For the DDR, yes, but as for the GPU, is this still the case with Collabora's ongoing work on Panthor?
https://www.collabora.com/news-and-blog/news-and-events/tami...
https://www.collabora.com/news-and-blog/news-and-events/tami...
[0] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/lin...