in DM36x the opreation mode is:
"ISIF RAW Input with Dark Frame Subtract from SDRAM Mode (CFG1.INPSRC1 = CFG1.INPSRC2 = 2)",
while in DM81XX, the operation " CFG1.INPSRC1 = CFG1.INPSRC2 = 2" is not surported.
the dark frame subtraction operation only surport " CFG1.INPSRC1 = 0, CFG1.INPSRC2 = 2" and " CFG1.INPSRC1 = 2, CFG1.INPSRC2 = 0"
but i can't find anydifference for IPIPEIF between dm36x and dm81xx.