The LCD specs should say what interface it is using. The Raspberry Pi uses the DSI. I also found - https://hackaday.io/project/364-mipi-dsi-display-shieldhdmi-adapter. It is an FPGA project that claims to have built a DSI controller. The block diagram leads me to think that they have actually done it in the FPGA. This is their git repository - https://github.com/twlostow/dsi-shield . It would be some task reverse engineering the verilog to understand the DSI implementation.Specifications are available to MIPI members only.