Page through the "PCB Guidelines" (often in an appendix or referenced application note). The v2.5 spec emphasizes:

While base D-PHY functionality existed in prior versions (v1.0, v1.2), version 2.5 brought several critical improvements:

The practical impact of MIPI D-PHY v2.5 was immense. It was the workhorse for:

The physical lane can exist in several logical states:

If you open the official PDF, you will immediately notice a rigorous technical structure. Here are the critical sections every engineer should bookmark: