Thursday, February 8th 2024
Latest AMD Linux Graphics Driver Patches Linked to "RDNA 4"
Phoronix head honcho, Michael Larabel, has noticed another set of interesting updates for AMD Graphics on Linux—albeit in preparation for next generation solutions: "engineers on Monday (February 5) posted a few new patch series for enabling some updated IP (intellectual property) blocks within their open-source AMDGPU Linux kernel graphics driver. This new IP is presumably part of the ongoing hardware enablement work for their next-gen RDNA 4 graphics." Team Red GitHub patches for "GFX12" targets appeared online last November, again highlighted by Larabel's investigative work—AMD engineers appear to be quite determined with their open-source software endeavors, as seen in LLVM-Project notes regarding GFX1200's enablement.
The new "IP block" updates included patches for the enabling ATHUB 4.1, LSDMA 7.0, IH 7.0, and HDP 7.0—presumably for next generation Radeon graphics solutions. Larabel provided a quick breakdown of these components: "ATHUB 4.1 is needed for clock-gating / power management features, LSDMA 7.0 is the latest IP for Light SDMA for general purpose System DMA (SDMA) on the GPU, IH 7.0 for the Interrupt Handler on the GPU, and HDP 7.0 for the Host Data Path support for CPU accessing the GPU device memory via the PCI BAR. As far as code changes, the big chunks of the work are from the auto-generated header files." He believes that AMD's engineers have largely moved on from current generation tasks: "The big version bumps for these IP blocks all the more are likely indicative of these bits being for next-gen RDNA 4 as opposed to further iterating on RDNA3 or similar." The patches could be merged into the upcoming Linux 6.9 release, possibly coinciding with a Radeon RX 8000 series rollout.
The new "IP block" updates included patches for the enabling ATHUB 4.1, LSDMA 7.0, IH 7.0, and HDP 7.0—presumably for next generation Radeon graphics solutions. Larabel provided a quick breakdown of these components: "ATHUB 4.1 is needed for clock-gating / power management features, LSDMA 7.0 is the latest IP for Light SDMA for general purpose System DMA (SDMA) on the GPU, IH 7.0 for the Interrupt Handler on the GPU, and HDP 7.0 for the Host Data Path support for CPU accessing the GPU device memory via the PCI BAR. As far as code changes, the big chunks of the work are from the auto-generated header files." He believes that AMD's engineers have largely moved on from current generation tasks: "The big version bumps for these IP blocks all the more are likely indicative of these bits being for next-gen RDNA 4 as opposed to further iterating on RDNA3 or similar." The patches could be merged into the upcoming Linux 6.9 release, possibly coinciding with a Radeon RX 8000 series rollout.