For your application needs, there is a Reference Design that you can try which is 1 to N MIPI CSI-2/DSI Duplicator. Please refer to the webpage and documentation is also provided: ...
Please refer to FPGA-RD-02060 Section 3, Design and Module Description. On the project file, modify the rx_dphy which is declared under rx/rx.sbx. On the Receiver section of the IP, modify the RX Interface to DSI and the Number of RX Lanes to one.
The user can change the hardened D-PHY blocks location between DPHY0 and DPHY1 by adding a LOCATE preference in the .lpf file to SITE "MIPIDPHY0" or SITE "MIPIDPHY1". The LOCATE preference is the following, for example: LOCATE COMP " ...