[PATCH 7/9] drm/gem-fb-helper: Always do implicit sync

[Daniel Vetter]

On Fri, Apr 20, 2018 at 03:11:24PM -0700, Eric Anholt wrote:
> Daniel Vetter <daniel.vetter at ffwll.ch> writes:
> 
> > I've done a lot of history digging. The first signs of this
> > optimization was introduced in i915:
> 
> I can't come up with any reason this would matter.  I almost came up
> with "You're doing tearing X11 front buffer rendering, and you do a
> modeset using the same fb, and so you block that modeset behind your
> rendering."  Except that:
> 
> 1) who cares
> 2) this helper is only for dma-bufs, not normal X11 rendering
> 3) your X11 driver should be doing pageflipping to be tear-free anyway,
>    let's just fix that[1].
> 
> Reviewed-by: Eric Anholt <eric at anholt.net>
> 
> [1] This is not actually me volunteering myself or anyone else to go fix
> that.

Ok, merged everything except the final three patches. I'll poke Rob for a
proper ack first before doing that. There's not much point in trying to
unify behaviour if there's still a driver doing things differently :-)

Thanks very much for your review.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch