Initial amdgpu driver release

[Alex Deucher]

On Tue, Apr 21, 2015 at 11:56 AM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
> Hi Alex,
>
> On 20 April 2015 at 23:33, Alex Deucher <alexdeucher at gmail.com> wrote:
>> 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
>> libdrm: libdrm_radeon
>> mesa: radeon, r200, r300, r600, radeonsi
>> ddx: xf86-video-ati
>>
>> 2. amdgpu stack
>> kernel driver: amdgpu.ko
>> libdrm: libdrm_amdgpu
>> mesa: radeonsi
>> ddx: xf86-video-amdgpu
>>
>> 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.
>> xf86-video-amdgpu:
>> http://cgit.freedesktop.org/~agd5f/xf86-video-amdgpu/log/?h=amdgpu
>> libdrm:
>> http://cgit.freedesktop.org/~agd5f/drm/log/?h=amdgpu
>> kernel:
>> http://cgit.freedesktop.org/~agd5f/linux/log/?h=amdgpu
>> mesa:
>> http://cgit.freedesktop.org/~mareko/mesa/log/?h=amdgpu
>>
>> 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.
>>
>> Please review!
>>
> Do you plan to sending out the libdrm patches to the ML ? I have a few
> comments that you might be interested in :-)

Yeah, just sent them out now.  Ran out of time last night.  Some of
the patches in the kernel and the ddx patch are really big so probably
too big for the ML.

Alex

>
> Cheers,
> Emil