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DS90UB940N-Q1: changing CSI lane count not working

Sujin Nam
Prodigy 180 points
Part Number: DS90UB940N-Q1

HI

I'm working with DS90UB940N.

I'm having trouble setting up MIPI-CSI lanes.

With MODE_SEL0 set to 4-lane, CSI 2-lane was set with the 0x6A register. But the output is still CSI 4-lane.

If MODE_SEL0 is modified to 2-lane mode and 0x6A is set to 2-lane, the output changes normally to CSI 2-lane.

Why would this happen?

Thanks,

Regards,

Sujin.