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AM5728: DSS EMC issue

Part Number: AM5728
Other Parts Discussed in Thread: DS90C387

I'm using an AM5728 coupled with a DS90C387 to interface to a display and am having some radiated EMC issues. There are likely a couple of causes from layout to cabling, however I'm hoping that we might be able to reduce the emissions from the PCBA by turning down the drive strength on the VOUT pins as the traces are really short and there seems to be some over/undershoot on the clock and signal pins. In addition, I'm wondering if the display clock can be made into a spread-spectrum clock to reduce our narrowband emissions.

I can probably accomplish similar things by doing some schematic / layout changes but those are expensive and I'd love to try them out by tweaking register settings first. Any help is appreciated!