The Efika MX runs a single-core 800MHz Cortex A8, which means it probably doesn't even have enough power to decode DVDs on its own. Is that indication you are working on new video decoder support in MythTV to allow it to make use of the hardware decoder on this platform?
The answer is no. We are not working on anything new, we have just adjusted mythtv in this power machine ([GO!COSS!!]) that supports playing dvds by common software decoders. Tested and confirmed by us.