As I described in another post, mpss-3.2.1 is running on kernel 3.13.10 perfectly (Fedora 20).
I can run programs on the processor and have no problems except:
1. mpssd daemon is taking 100% of one host cpu all the time.
2. If mpssd is not started the coprocessor fan is always on. When mpssd starts it goes off when there is no activity. Since people may not want to use the card all the time the default fan speed should be off or low it seems like.