Initial AMD RDNA5/GFX13 Code Sent Out For Mesa RADV & RadeonSI Drivers

After AMD posted GFX13 patches for the AMDGPU Linux driver earlier in the week, today they opened the Mesa merge request for introducing the very primitive GFX13 support for the RADV Vulkan and RadeonSI Gallium3D/OpenGL drivers. This merge request is just the very start of laying out the GFX13 graphics support for RADV and RadeonSI. AMD GFX13 is believed to be what will be next-gen RDNA5 GPUs. This merge request has the initial GFX13 support along with the chip ID and descriptor changes for RadeonSI and RADV. Follow-up merge requests over the coming weeks/months will fill in more of the hardware enablement, including the ACO compiler back-end changes and register support. It's the start anyhow and good seeing the GFX13/RDNA5 Linux driver support work picking up ahead of the next-generation AMD Radeon graphics cards expected to begin shipping later in 2027.