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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] Feature request: Add support for fencing for PRIME setups"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95472#c45">Comment # 45</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] Feature request: Add support for fencing for PRIME setups"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95472">bug 95472</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>(In reply to Axel Davy from <a href="show_bug.cgi?id=95472#c44">comment #44</a>)
<span class="quote">> (In reply to Chris Wilson from <a href="show_bug.cgi?id=95472#c43">comment #43</a>)
> > There's no synchronisation point in dri3 with X:
> >
> > diff --git a/src/loader/loader_dri3_helper.c
> > b/src/loader/loader_dri3_helper.c
> > index a55719a..6b5736b 100644
> > --- a/src/loader/loader_dri3_helper.c
> > +++ b/src/loader/loader_dri3_helper.c
> > @@ -1399,6 +1399,7 @@ loader_dri3_get_buffers(__DRIdrawable *driDrawable,
> > buffers->back = back->image;
> > }
> >
> > + loader_dri3_wait_x(draw);
> > draw->stamp = stamp;
> >
> > return true;
> >
> > brings it into line with dri2.
>
> I don't see why waitX is required.
>
> The call has only an impact when a fake front buffer is used.
> And when fake front buffer is used, the same buffer is always used and it
> seems correctly updated when needed.</span >
Because the tiled_buffer is not kept to date with X.</pre>
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