Initial amdgpu driver release
alexdeucher at gmail.com
Mon Apr 20 15:33:53 PDT 2015
I'm pleased to announce the initial release of the new amdgpu driver.
This is a partial replacement for the radeon driver for newer AMD
asics. A number of components are still shared. Here is a comparison
of the radeon and amdgpu stacks:
1. radeon stack
kernel driver: radeon.ko
mesa: radeon, r200, r300, r600, radeonsi
2. amdgpu stack
kernel driver: amdgpu.ko
Older asics will continue to be supported by the radeon stack; new
asics will be supported by the amdgpu stack. CI (Sea Islands) asics
have support in both driver stacks, but this is purely for testing
purposes. CI parts are officially supported in the radeon stack.
Support for CI on the amdgpu stack is determined by a config option in
the kernel. CI support is not enabled by default for amdgpu.
Most of our focus has been on Carrizo support, so there are some gaps
in the dGPU support for Tonga and Iceland, notably power management.
Those gaps will be filled in eventually.
Also included in this code base are full register headers for just
about every block on the asics.
Barring the gaps mentioned above, the driver stack is functionally on
par with radeon including:
- OpenGL 3.3 support using the radeonsi mesa driver
- Video decode support using UVD
- Video encode support using VCE
The code can be found in the amdgpu branches of the following git trees.
To test the new driver stack you will need to specify a device section
in your xorg.conf with the driver set to amdgpu rather than radeon.
The AMD Linux Driver Team
More information about the dri-devel