Support for 2D engines/blitters in V4L2 and DRM

[Tomasz Figa]

On Thu, Apr 18, 2019 at 5:55 PM Paul Kocialkowski
<paul.kocialkowski at bootlin.com> wrote:
>
> Hi Daniel,
>
> On Thu, 2019-04-18 at 10:18 +0200, Daniel Vetter wrote:
> > On Wed, Apr 17, 2019 at 08:10:15PM +0200, Paul Kocialkowski wrote:
> > > Hi Nicolas,
> > >
> > > I'm detaching this thread from our V4L2 stateless decoding spec since
> > > it has drifted off and would certainly be interesting to DRM folks as
> > > well!
> > >
> > > For context: I was initially talking about writing up support for the
> > > Allwinner 2D engine as a DRM render driver, where I'd like to be able
> > > to batch jobs that affect the same destination buffer to only signal
> > > the out fence once when the batch is done. We have a similar issue in
> > > v4l2 where we'd like the destination buffer for a set of requests (each
> > > covering one H264 slice) to be marked as done once the set was decoded.
> > >

Out of curiosity, what area did you find a 2D blitter useful for?

Best regards,
Tomasz