Assembled the board, the next challenge is software. 

There is a chance the display will just magically work with existing DSI kernel drivers and panel drivers from Nexus 7 bring-up back in the days. There is an interesting and inspiring thread on Raspberry Pi forum, https://www.raspberrypi.org/forums/viewtopic.php?t=253912. The topic starter was doing the same bring-up with CM3+, and eventually, he succeeded. The new parameter to the equation is the difference between BCM2837 and BCM2711. Also, the DRM stack is in constant development by Raspberry Pi Foundation, and what worked just yesterday may no longer work with after the latest update. We will see.