On Fri, Oct 21, 2016 at 09:02:27PM +0100, Chris Wilson wrote: > On Fri, Oct 21, 2016 at 08:19:03PM +0200, Daniel Vetter wrote: > > On Fri, Oct 21, 2016 at 01:57:28PM +0100, Chris Wilson wrote: > > > I think of a use for sending an empty clip: where you don't want to > > > push any new pixel data, but you do want to be sure that the pipeline > > > has been flushed. > > > > What exactly should an empty rectangle flush out? It's a bit unclear, but > > for speed I guess drivers should be allowed to make dirty async ... > > No idea! I'm just speculating that I can see a use for a dirtyfb barrier > even with an empty cliprect. Empty clips are a useful distinction > elsewhere that I would suggest not forbidding them outright but defining > their behaviour. In general I prefer clarifying unused and undefined cases to "reject them". We can always add a cap later on when we want to give them some real meaning. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
