[Intel-gfx] [RESEND] drm/i915: Interactive RPS mode

[Chris Wilson]

Quoting Ville Syrjälä (2018-07-20 14:50:25)
> On Fri, Jul 20, 2018 at 02:38:32PM +0100, Chris Wilson wrote:
> > Quoting Ville Syrjälä (2018-07-20 14:32:40)
> > > Another question is what happens where there are parallel flips
> > > happening? One could undo the boost from the other AFAICS. But maybe
> > > we don't care enough to protect against that?
> > 
> > It's a counter, so the "interactive" mode remains high until all
> > concurrent flips are completed.
> 
> Ah. I guess the bool in the atomic state threw me off. I suppose that
> one is just an optimization to avoid calling the function more than
> once?

Yes, it's that I caught the RPS counter going negative. We have more
cleanup_plane than we prepared.... I believe that's from
find_initial_plane.
-Chris