AMD's unannounced RDNA 4m graphics architecture, internally designated GFX 11.7, just gained open-source Vulkan driver support in Mesa thanks to Valve's Linux graphics team. Rhys Perry, a Valve engineer, authored the ACO compiler and RADV Vulkan driver changes that were merged into Mesa Git this week, building on LLVM shader compiler work that first surfaced months ago. The fact that Valve is driving hardware enablement for silicon that hasn't even been officially announced underscores the deepening collaboration between AMD and Valve's open-source driver team.
The GFX 11.7 target is shaping up to be more than a simple rebrand of RDNA 3. The merged patches extend features previously exclusive to RDNA 4 (GFX12) down to RDNA 4m, including shaderMixedFloatDotProductFloat8AccFloat32 and EXT_shader_float8 support for 8-bit floating point operations. These capabilities suggest RDNA 4m sits in an interesting architectural middle ground, pulling forward next-generation features into what appears to be a mobile or embedded APU/SoC variant.
Since AMD acknowledged RADV replacing AMDVLK last year, the company has been providing more early resources to Valve's Linux graphics team in hardware enablement. The ACO compiler, originally created by Valve engineers, now serves as the primary shader compilation path for AMD GPUs on Linux. No official product announcements have been made for RDNA 4m, but the driver work points to upcoming APUs or SoCs that could land in laptops, handhelds, or embedded devices.
