Wayland

Intro

Wayland is the new protocol dedicated to replace X11 windowing system. It's first Linux implementation is called weston. It uses KMS/DRM video drivers direct access, and so needs a recent kernel (4.4+). It currently works well on APF6.

Installation

Use corresponding config (apf6_wayland_defconfig), or activate it in menuconfig:

...
Target packages  --->
    ...
    Graphic libraries and applications (graphic/text)  --->
        ...
        [*] weston                                                                                 │ │  
│ │           default compositor (drm)  --->                                                       │ │  
│ │     -*-   DRM compositor                                                                       │ │  
│ │     [ ]   RDP compositor                                                                       │ │  
│ │     [ ]   headless (testing) compositor                                                        │ │  
│ │     [ ]   Wayland (nested) compositor                                                          │ │  
│ │     [ ]   X11 (nested) compositor                                                              │ │  
│ │     [ ]   XWayland support                                                                     │ │  
│ │     [*]   desktop shell                                                                        │ │  
│ │     [*]   fullscreen shell                                                                     │ │  
│ │     [*]   ivi shell                                                                            │ │  
│ │     [*]   kiosk shell                                                                          │ │  
│ │     [*]   demo clients                                                                         │ │

Launching

• Needs to be done from a graphical/framebuffer console. To activate one.
• Login to graphical console / tty1
• Do some config the first boot:

# mkdir /tmp/runtime
# chmod 0700 /tmp/runtime
# export XDG_RUNTIME_DIR=/tmp/runtime

• Start weston

# weston -B drm-backend.so

Tips

• For OpenGL/ES demos, it is necessary to increase Linux kernel allocable video memory at boot:

BIOS> setenv extrabootargs '${extrabootargs} cma=256M'

• To rotate display in landscape mode on OPOS93Dev kit, one might create '/etc/xdg/weston/weston.ini' config file and add it:

[output]
name=DSI-1
mode=720x1280@60
transform=rotate-90