I don’t have any news at this time. As the device is new and MMAL is being deprecated from Kodi, we need to support V4L2/GBM. This is still a work in progress by Raspberry Pi
In the interim we will support software decoding. It will be a long time (at least a year) before hardware video acceleration is working well using this stack.
Any external contributions in the form of testing and development in the community would also be appreciated.
Sam