[Intel-gfx] [RFC PATCH 2/2] sna: Support running nested in Mir

[Chris Wilson]

On Mon, Jul 22, 2013 at 08:20:49AM +0010, Christopher James Halse Rogers wrote:
> On Mon, 22 Jul, 2013 at 5:53 PM, Chris Wilson
> <chris at chris-wilson.co.uk> wrote:
> >With xorgMir this is not going to fly. Make sure the compatibility
> >cruft, first of all, exists and is out of line in a header.
> >
> 
> Do you mean remove the various #ifdef XMIR bits, or *all* the bits
> gated on xorgMir? Some of that's not going to be trivial to hide
> away in a header.

It looked like it could be done quite simply. The most important part is
to avoid the extern xorgMir - as that will be a major nuisance.

> > And expose the driving heartbeat of when to refresh the screen
> >pixmap from Xmir.
> >
> I'm not sure what you mean here - Xmir exposes the
> on-buffer-available callback, which gets triggered when swap_buffers
> has returned the next buffer to render to. This is what I'd think of
> as the refresh heartbeat. Is this not what you mean?

Yes, that's what it looked like. But I didn't see how that was being
coupled into how fast we updated.
 
> If you're rendering as fast as possible, this will be a
> once-per-compositor-vblank event.

That's what I would expect, so I am just missing the logic between that
and us sending updates.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre