Indeed, I pushed support for the MIPI-DSI Display, but for the previous generation of SoCs (AXG, for audio products).
But good news, the G12B DSI integration is really close, so it’s only a matter of small adaptations to make it work on VIM3/VIM3L.
But note you’ll still have the native display orientation, rotation is also not supported (180deg is easy, 90deg is really complex).
I’ll do my best to work on it, but don’t expect it quickly either.
Neil