MIPI DSI display configuration in Android (dtsi file or other way)

We need to configure Android to use a specific MIPI DSI lcd display. We are using a reference board with MIPI connectors. We already developed the bridge board, so the hardware part is fine. We have some documentation from the board and from the display and the source for the Android for the reference board. I think it is a question of developing a dtsi file and them use it with device tree file or recompiling Android.
For reference only: I also have an adapter board that enables me to connect this display to HDMI (but I don't have the source, it is a third party product).