Ron Minnich of Google who has been one of the original developers to Coreboot/LinuxBIOS has been engaged in "Project X" for providing "pure open-source" support on AMD Zen platforms.
Project X is about "eXcising binary blobs from the x86 part of Zen CPUs." This open-source AMD Zen support is being worked on both for Coreboot and the Oreboot downstream that is written in Rust.
Minnich will be talking about Project X in more detail next month during the Open-Source Firmware Conference (OSFC 2020) taking place at the start of the month.
But that's not all at OSFC about open-source AMD support either... AMD system management architect Supreeth Venkatesh will be talking about the company's work on open-source OpenBMC firmware support for their platforms. They have been working on open-source OpenBMC support as well as upstream support around AMD system interfaces.
Stay tuned for more information next month during OSFC . Also to be discussed at the December event is AMD platform support for TrenchBoot .