[Interest] Dual screen Wayland on i.MX6

[Thiago Macieira]

On quinta-feira, 27 de julho de 2017 01:57:32 PDT Filip Piechocki wrote:
> Is it possible to run some simple QtWayland compositor that would control
> both displays? 

You can't load two QPA plugins in the same application. If you require linuxfb 
for one, you can't use vivante for the other and vice-versa. You may be able 
to solve this by the way we solve everything in computing: adding another 
layer of indirection:

You run three compositors:
* one on each of the two screens, with the proper plugins
* one that is also a Wayland client, connecting to each of the two other 
compositors and showing the windows where appropriate

Note that the regular Wayland client plugin is not designed to connect to two 
compositors. You'll need to patch it or write your own (your protocol should 
be very simple anyway).

> So we can have one HW accelerated application displayed on
> both screens?

That may not be possible. Are you sure your acceleration hardware is able to 
send pixels to the LVDS?

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center