You don’t and likely never will get a fully open stack for those GPUs. Even the latest Radeon cards have a lot of closed-source binary blobs for firmware.
Where the line is drawn between the driver and the firmware blobs makes a massive difference though. Look at the recent case of AMD trying (and failing) to license HDMI 2.1+ for their open source drivers.
You don’t and likely never will get a fully open stack for those GPUs. Even the latest Radeon cards have a lot of closed-source binary blobs for firmware.
Where the line is drawn between the driver and the firmware blobs makes a massive difference though. Look at the recent case of AMD trying (and failing) to license HDMI 2.1+ for their open source drivers.
https://www.phoronix.com/news/HDMI-2.1-OSS-Rejected