Wait is IPU6 working now? My work laptop has it and the only thing I know is it might work provided I use some user space relay driver and a bunch of other things.

Has this situation improved?

I looked and looked and looked. I don't know why but IPU7 is reported to be pretty good. But IPU6 might still be in perpetual limbo; I don't know. What kernel are you on btw? Sorry for your pain.