[PATCH] Add virtio gpu driver.

[Daniel Stone]

Hi,

On Wednesday, March 25, 2015, Dave Airlie <airlied at gmail.com> wrote:

> On 25 March 2015 at 08:50, Daniel Stone <daniel at fooishbar.org
> <javascript:;>> wrote:
> > I'm not going to lie, I was really hoping the 5th (?) GPU option for
> > Qemu would support pageflipping. Daniel's comment about conversion to
> > atomic is relevant, but: do you have a mechanism which allows you to
> > post updates (e.g. 'start displaying this buffer now please') that
> > allows you to get events back when they have actually been displayed?
>
> Page flip is implemented in a later patch,
>
>
> https://www.kraxel.org/cgit/linux/commit/?h=virtio-gpu&id=1e167e8e964f8e08100d315dd354cc0a4b090841
>
> Since its a long way from an actual display, finding out when
> something is actually displayed is hard,
> but when we've posted it to the frontbuffer should be fine.
>

Oh nice. 100% exact timings aren't critical; it's more just having
something to gate to 60fps that we can actually drive Weston's repaint loop
off, as that's (not unreasonably) driven by pageflip events.

Cheers,
Daniel
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