I have tried hard to verify your statement and come up against a dead end. All of my research leads me to the conclusion that PDMI is an industry standard. My reference points are
The connector is PDMI based, and is not compatible with other PDMI cables. PDMI refers to the pin outputs, not necessarily the connector form itself.
What do you have in support of what you say?
My interest here is not to score points but to get facts right.