AIUI, we're not taking new FB drivers. This should be a DRM driver 
instead.

Yes - clone one of the dumb DRM drivers, or if you've got any little bits
of acceleration (even rolling the display) then it's possibly worth
accelerating for text mode.

quoted

+- max-width: The width of the framebuffer in pixels.
+- max-height: The height of the framebuffer in pixels.
+- bits-per-color: only "8" is currently supported  

These are not h/w properties.

How are the max ones not hardware properties ?

Alan