Use hardware sprite plane as overlay

[Cao Duc Quan]

Thanks Jasper.
I just go a requirement to investigate this in xorg and need a demo for it.
Maybe I need to switch our solution to Wayland Weston but I need to finish
my demo first :)

Once again, thanks and Happy New Year!


On Sat, Jan 2, 2016 at 10:24 AM, Jasper St. Pierre <jstpierre at mecheye.net>
wrote:

> Well, the X server shutdown process would have restored the fbcon
> console and turned out KD_TEXT, I would have thought. I don't think
> you can assume that the front buffer will stay exactly still quite
> yet.
>
> It also does mean that all clients that were previously running are
> now dead, and you have to restart them. So you can't render to the
> primary and sprite planes at the same time.
>
> Again, I would really recommend you use Wayland or another system.
>
> On Fri, Jan 1, 2016 at 6:06 PM, Cao Duc Quan <caoducquan at gmail.com> wrote:
> > But I could run it!
> > There is a trick for this: first I stop xorg by running this command:
> > service xserver-nodm stop
> >
> > Than I run my tool
> > ./modetest_x11 -s 9:XR24 -P 9:1280x720 at XR24
> >
> > After that I start xorg again
> > service xserver-nodm start
> >
> > And it seems xserver start successful. And I have both xserver render to
> > primary buffer and modetest render to Sprite Plane
> >
> > It is a bug in kernel ?
> >
> > On Fri, Jan 1, 2016 at 5:04 AM, Jasper St. Pierre <jstpierre at mecheye.net
> >
> > wrote:
> >>
> >> You can't. The only client that is allowed to do modesets, either on
> >> planes or on the primary buffer, is the DRM master, which in this case
> >> is the Xorg server. It would be much easier and better to use Wayland
> >> instead.
> >>
> >> On Thu, Dec 31, 2015 at 12:16 AM, Cao Duc Quan <caoducquan at gmail.com>
> >> wrote:
> >> > Thanks Jasper.
> >> > I plan to hook to QT embedded to make it use sprite plane buffer.
> >> > I could make a tool (customized from modetest.c of libdrm) to render
> to
> >> > sprite plane which are running in xorg.
> >> >
> >> > Thanks and Happy New Year.
> >> > cdq
> >> >
> >> > On Wed, Dec 30, 2015 at 2:52 AM, Jasper St. Pierre
> >> > <jstpierre at mecheye.net>
> >> > wrote:
> >> >>
> >> >> The only currently supported mechanism for using hardware overlays is
> >> >> video planes through VDPAU / VA-API.
> >> >>
> >> >> Xorg does not have any other supported mechanism for using hardware
> >> >> overlays. Try looking at Wayland, which can have support for hardware
> >> >> planes.
> >> >>
> >> >> On Fri, Dec 25, 2015 at 8:29 AM, Cao Duc Quan <caoducquan at gmail.com>
> >> >> wrote:
> >> >> > Dear all,
> >> >> > I am studying the Graphics stack in linux.
> >> >> > I found that the Intel Baytrail E38xx support 2 pipe display and
> each
> >> >> > pipe
> >> >> > has
> >> >> > - 1 x primary plane
> >> >> > - 2 x sprite plane
> >> >> > - 1 x cursor plane
> >> >> >
> >> >> > Is it possible to use sprite plane as overlay plane which means we
> >> >> > can
> >> >> > render UI to sprite plane (for example QT could render Widget to
> >> >> > sprite
> >> >> > plane) ? If so, could any one point me to some a sample code or any
> >> >> > documents ?
> >> >> >
> >> >> > Many Thanks,
> >> >> > --
> >> >> > Quan Cao
> >> >> > 0976574864
> >> >> >
> >> >> > _______________________________________________
> >> >> > xorg-devel at lists.x.org: X.Org development
> >> >> > Archives: http://lists.x.org/archives/xorg-devel
> >> >> > Info: http://lists.x.org/mailman/listinfo/xorg-devel
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >>   Jasper
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > Quan Cao
> >> > 0976574864
> >>
> >>
> >>
> >> --
> >>   Jasper
> >
> >
> >
> >
> > --
> > Quan Cao
> > 0976574864
>
>
>
> --
>   Jasper
>



-- 
Quan Cao
0976574864
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