The MIPI D-PHY (Display Phy) is a widely used physical layer interface designed by the MIPI Alliance. It is primarily used to connect cameras (CSI-2) and displays (DSI) to application processors in mobile devices.
Version 2.5 introduced significant updates, most notably the ability to operate in a non-forwarded clock mode and support for higher bandwidth capacities required by 4K/8K video and multi-megapixel cameras. mipi dphy specification v25 pdf fixed
The D-PHY lane can be in several states: The MIPI D-PHY (Display Phy) is a widely
If you cannot access the v2.5 PDF but need to verify that your implementation is "fixed" (compliant), use the MIPI D-PHY Conformance Test Suite (CTS). The CTS is often less restricted and published in summary. If your device passes the v2
The CTS tells you:
If your device passes the v2.5 CTS, it is effectively "fixed," even if you used a slightly older draft to design it.