Weston refresh rate?

[Vanhauwaert Wouter]

Hello all,

I seem to have an issue, but don't really know what/who to address.
Whatever I try to run on my weston installation, I never seem to exceed +- 40fps. 
That can also be seen by running the weston-simple-egl test.
When I run weston-simple-egl -f, so fullscreen, I get upto 27 fps.
But, when I add -b, so weston-simple-egl -f -b (Don't sync to compositor redraw (eglSwapInterval 0)), I get a stunning 175 fps!
So what is limiting the weston refresh rate? I'm running on a NXP IMX6D, industrial grade, morty yocto, weston/wayland 1.11. 

My fb settings are:
 
mode "1920x1080-60"
# D: 148.500 MHz, H: 67.500 kHz, V: 60.000 Hz
geometry 1920 1080 1920 2160 16
timings 6734 148 88 36 4 44 5
accel false
rgba 5/11,6/5,5/0,0/0
endmode

EGL is provided by vivante

Any thaughts?