Have a look here: https://github.com/jefflessard/tm…eedback/devices
If you know the VFD config that worked on CE there should be a matching dtso file. Amlogic u-boot doesn't support overlays so you cannot load/use the dtso overlays directly, but you should be able to look at the content there and see how I've implemented the same changes in board dts files in my kernel branch.
The device-tree content for tm16xx has changed format a bit due to kernel maintainer feedback so the dts files in my 6.17 repo will work with the driver in LE13/master but not the driver in the LE12.2 image.
