Another advice:
You also need to use the correct PRIVID value when setting the MPAX mapping. The PRIVID value used by EDMA is stored in the OPT field. This value is automatically set to the PRIVID value of the master, which has written the EDMA PaRAM entry. For example, if core 2 writes the PaRAM entry, you have to use PRIVID 2 for the MPAX mapping.
Ralf