7. 9 inch waveshare DSI screen issue

Hello…I bought a 7.9inch waveshare DSI touch screen, which I connect to my raspberry pi4+volumio to make a music streamer, but when I connect through the DSI port, nothing comes on the screen…what should I do… …? pls can someone help me… i connected 5inch DSI touch screen and i am using it without any problems,… new 7. 9inch is the problem… installed driver in sd card then i get raspberry screen…

You may have a look at the instructions in “README_MOD.txt” from the 5.10.92-32-mod.V1.zip linked here.