[Intel-gfx] [PATCH] drm/i915/ehl: Add missing VECS engine

[Chris Wilson]

Quoting Matt Roper (2019-06-25 16:26:48)
> On Fri, Jun 14, 2019 at 03:17:39PM -0700, Matt Roper wrote:
> > On Fri, Jun 14, 2019 at 02:37:49PM -0700, José Roberto de Souza wrote:
> > > EHL can have up to one VECS(video enhancement) engine, so add it to
> > > the device_info.
> > 
> > Bspec 29150 has a footnote on VEbox that indicates "Pass-through only,
> > no VEbox processing logic."  That note seems a bit vague, but I think I
> > saw some more detailed info in the past somewhere that indicated the
> > VECS command streamer is still technically present but doesn't actually
> > do any video enhancement on EHL; it just passes content through to SFC.
> > 
> > I'm not terribly plugged into the media side of the world, so I'm not
> > sure if we want to expose VECS to userspace if it's basically a noop and
> > doesn't do what it normally does on other platforms.  Bspec page 5229
> > implies that SFC can be fed directly by the decode engine without going
> > through VEBOX, so I'm not sure if media userspace would ever have a use
> > for the passthrough-only VECS streamer.
> > 
> > We should probably ask someone on the media team what their thoughts are
> > on this.
> 
> Since the media team confirmed that there is indeed a use case for a
> passthrough-only VECS,

If the CS exists as a separate entity sure... Any chance we can get an
ehl into CI to actually confirm this?
-Chris