[PATCH 1/3] RFC: drm: Restrict vblank ioctl to master

[Daniel Vetter]

On Fri, Jun 24, 2016 at 06:55:55AM +1000, Daniel Stone wrote:
> Hi Rainer,
> 
> On 24 June 2016 at 05:54, Rainer Hochecker <fernetmenta at kodi.tv> wrote:
> > I spent some time reading and investigating on this. Bear with me, I am
> > doing Kodi development in my spare time and may not be up-to-date on all
> > platforms. Seems Wayland is much better suited to serve as reference
> > platform as X11 does. Is that correct? If so I don't request
> > OML_sync_control for EGL. Don't waste resources and let the old crap die.
> 
> I certainly think so, for a number of reasons. I don't believe X11
> will ever be as accurate or as efficient as Wayland can be.

Seconded. I think GLX+OML_sync_control for X11 and Wayland with EGL and
the frame timing Daniel Stone laid out (already should work in both cases)
seems like the perfect solution.

What kind of transition plan would be reasonable? Should we start with a
printk_once to inform userspace developers that they should change their
code, and then eventually (after a few years or so) remove that ioctl?
Maybe first behind a module option?

Who should all be on cc for such a change?

I'd like to get this started, it'll take years no matter what ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch