AMD's New Carrizo Graphics PCI IDs
Written by Michael Larabel in AMD on 21 April 2015 at 09:30 AM EDT. 5 Comments
AMD --
With yesterday's release of the new open-source "AMDGPU" Linux graphics driver stack we finally have a look at some of the hardware enablement code for the graphics processors of the upcoming "Carrizo" APUs.

The initial Carrizo PCI IDs for the graphics adapter are 0x9870, 0x9874, 0x9875, 0x9876, and 0x9877. There may end up being more models than that, but these are the IDs added as part of the initial bring-up. Not all of these IDs may end up being part of released products either as sometimes they allocate more PCI IDs than actually end up being used by released hardware.

The forthcoming Carrizo APUs use AMD's Excavator micro-architecture, will feature HSA 1.0 compliance, support DDR3/DDR4 memory, boast new graphics capabilities, and feature major improvements in power efficiency over existing AMD APUs. Latest reports are that AMD Carrizo APUs should be surfacing this summer.

We also see from the code that with the new hardware there's 4K video encode/decode rather than pre-Tonga hardware being limited to 1080p. There's also a new H.264 performance hardware decoder exposed for Tonga, among other improvements to RadeonSI Gallium3D and new features of the AMDGPU kernel driver. Also added to Radeon Gallium3D was the open-sourced Addrlib from Catalyst.
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