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C6748 DMA trouble

Hello,

I've been trying to get dm6446_h264enc_02_02_00_02_production to run on a C6748 EVM.  A handful of different errors have seemed to point at DMA not working.  The first error encountered was that the process() call was hanging in QDMA_wait().

To try to isolate the issue, I tried a presumably simpler test of building example DMAN3 software in framework_components_2_26_00_01.  Specifically the fastcopytest project located here:  framework_components_2_26_00_01\examples\ti\sdo\fc\dman3\examples\fastcopy\evm6748_bios\fastcopytest.pjt

The read-only EDMA3 CCCfg register seems to have a value of 0xE8100000 (versus 0x00223445 or similar).  See line 450 of dman3_initImpl.c copied below:

    cccfg =  *(((volatile Uns *)_DMAN3_edma3Addr)+1);

What might cause this?