I am looking for ways to test specifically MIPI DSI lane signal strength (because I am kind of pushing the envelope on the trace length and width), and am happy to add test points to the PCB design. I really appreciated all the tips in the original question, "How to create measurement points on a PCB for diagnostics?", and the additional information on "How to measure/show MIPI-DSI 4 lane signals on DSO/oscilloscope"?
However, I am concerned about adding any components, even a zero resistor, to the MIPI traces as it might slow the high-speed signal. For example, I noticed that this document had the following warning on the last page, which almost justified my caution (except I don't think they were talking about zero resistors).
Further, in my search I am also noticing that most MIPI signal strength testing is software-based, and conducted through the processor.
So my main question is: What is the best way to add test points to the PCB to make sure that all of the MIPI traces are functioning?
My secondary question is: Does anyone even add test points to MIPI lanes on the PCB, or is all signal strength testing only conducted via software run through the processor these days?