Hdmi-in aka video0 blocks camera in Chromium

Hi, can somebody tell me how to disable hdmi-in aka rk_hdmirx as /dev/video0? I want to use a usb camera on this dev port. But the camera is shown as /dev/video1. Problem: i have no access in chromium browser. Only dev/video0 aka rk_hdmirx is selectable.
S.o. recommended to write a device tree overlay dts file with status = disable, but I have no idea how. Or maybe there is also an easier way…
Latest Debian version is installed

I also have issue with Intel Realsense depth sensor because of /dev/video0 being used by rk_hdmirx. @radxa would you help us disable hdmi input if it is not used in customer application, please?

Detail:
radxa@rock-5b-plus:~$ ./Intel.Realsense.CustomRW -l
CustomRW for Intel RealSense D400, Version: 2.13.1.0

error calling rs2_create_device(info_list:0xaaaae1e109a0, index:0):
/dev/video0 is no video capture device Last Error: Invalid argument

Check if you have the permission to access the node.

You can try delete the /dev/video0 node, or blacklist rk_hdmirx module.