21 Oct
2016
21 Oct
'16
8:02 p.m.
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. -Chris
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Chris Wilson, Intel Open Source Technology Centre