AMDGPU SI userspace support - experimental

AMDGPU SI userspace support - experimental

[Marek Olšák]

Hi,

The following branches add SI support to the amdgpu side of our
graphics driver stack.

git://people.freedesktop.org/~mareko/mesa amdgpu-si
git://people.freedesktop.org/~mareko/libdrm amdgpu-si
git://people.freedesktop.org/~mareko/xf86-video-amdgpu amdgpu-si

Thanks to Ronie Salgado <roniesalg@gmail.com> for starting this.

This should be considered a work in progress, because it's not in a
working state yet. Below is a summary of what works and what doesn't.

The current kernel support in the drm-next-4.8-wip-si branch doesn't
work. It hangs or deadlocks on the first command submission that only
exercises EVENT_WRITE(ZPASS_DONE) and doesn't use draw packets. I
think it's a rebase issue, because a previous version of the kernel
support (based on kernel 4.4) still works and piglit on GBM gives the
same or similar results as radeon.

The X server has never worked for me. The screen is mostly black and
contains funny colors at the bottom.

Marek
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