Hi @ShaneCCC,
To update for the 2) in previous comment, I could read the NVCSI_STREAM_0_PF_CRC_0 (0x15a101d8) as below :
nvidia@ubuntu:~/Workspace$ sudo devmem2 0x15a101d8 b
/dev/mem opened.
Memory mapped at address 0xffff89ddd000.
Value at address 0x15A101D8 (0xffff89ddd1d8): 0xE9
nvidia@ubuntu:~/Workspace$ sudo devmem2 0x15a101d8 w
/dev/mem opened.
Memory mapped at address 0xffffbbb92000.
Value at address 0x15A101D8 (0xffffbbb921d8): 0x61006100
At least, I could see that the calculated CRC and the received CRC are matched each other.