How to modify dp port code

I am trying to modify the kernel/nvidia/drivers/video/tegra/dc/dp.c
but it can not work.

Is it expect to be at other dir to modify dp behavior?
I would like to add some dpcd changes before link training.

(if this is not supported please inform me, thanks)

That driver is for xavier/tx2 and nano. Not for any orin series.

Orin display driver is not fully open source, so it has nothing to customize.

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