Wayland on Embedded

[Pekka Paalanen]

On Wed, 21 Nov 2012 11:38:57 +0800
Henius Dong <donglw at pset.suntec.net> wrote:

> Hi Abhijit
> 
> -----Original Message-----
> From: Abhijit Potnis
> Sent: 2012/11/20 15:04
> 
> > On Mon, Nov 19, 2012 at 3:34 PM, Henius Dong <donglw at pset.suntec.net
> > <mailto:donglw at pset.suntec.net>> wrote:
> >
> >     Hello Abhijit
> >
> >     I saw the topic "Wayland on Embedded" in wayland-devel mailing list.
> >     I'm interested in this topic too. But, I'm naive in this topic now.
> >     So, I write a mail to you to see whether you could give me some
> >     hints or not?
> >
> >     Now, I'm going to port the wayland onto freescale iMX6 board. It
> >     supports Linux/WinCE/Android OS. I want to use the Linux OS
> >     "without" DRM support. So, it going to be difficult to use the
> >     compositor-drm.
> >     But, freescale offers the GLES2 implementation. So, I wonder I might
> >     need the same GLES2 >> framebuffer back-end.
> >
> >
> > Freescale iMX6 driver releases do show that they now support drm in
> > their kernel. You may want to try that.
> > But as such writing a GLES2 over FB backend will work, but with
> > restricted features as listed in the
> > below mail chain. With much of the work now abstracted by gles2-renderer
> > (gl-renderer as its called now) , it must be simple enough to write the
> > back-end.
> Thanks for your information. I would confirm with Freescale.
> 
> >
> >     Could you give me some help?
> >     Anything is welcome.
> >
> > This will be of some help
> > <http://lists.freedesktop.org/archives/wayland-devel/2012-September/005324.html>
> I've checked this mail chain. The "restricted features" you mentioned is 
> I won't able to run GL client by using GLES2 over FB backend, right? But 
> since iMX6 has the DRM support, using DRM backend may be easier.

Whether or not Wayland clients that use GL will work, essentially
depends on libEGL, and not really about the backend the compositor is
using. In fact, client support and compositor backend are orthogonal.
They only need to be compatible in the sense, that what clients
provide, the compositor can use.

LibEGL is the standard place to implement the support for clients that
use GL, but nothing prevents you from inventing your own way, if you
control all the applications. Qt5 AFAIU supports its own thing, and so
it is not dependant on libEGL's Wayland platform support.


Thanks,
pq