framebuffer rotation

Hi, I just learned that

root@letux:~# echo 0 > /sys/class/graphics/fbcon/rotate_all root@letux:~# echo 1 > /sys/class/graphics/fbcon/rotate_all root@letux:~# echo 2 > /sys/class/graphics/fbcon/rotate_all root@letux:~# echo 3 > /sys/class/graphics/fbcon/rotate_all

also does screen/framebuffer rotation.

Now I wonder why we need to patch drm_fb_helper (which is currently broken in letux-5.3) and have our own ./tiler-ctl script?

Any suggestions or explanations are welcome.

BR and thanks, Nikolaus