Hi, On Thu, 2019-04-18 at 18:09 +0900, Tomasz Figa wrote: > On Thu, Apr 18, 2019 at 5:55 PM Paul Kocialkowski > <paul.kocialkowski@xxxxxxxxxxx> 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? The initial motivation is to bring up a DDX with that for platforms that have 2D engines but no free software GPU drivers yet. I also have a personal project in the works where I'd like to implement accelerated UI rendering in 2D. The idea is to avoid using GL entirely. That last point is in part because I have a GPU-less device that I want to get going with mainline: http://linux-sunxi.org/F60_Action_Camera Cheers, Paul -- Paul Kocialkowski, Bootlin Embedded Linux and kernel engineering https://bootlin.com
