I read many posts about driver development of CSI-2 cameras. It appears many difficulties are from communication using I2C.
We have other ways to configure CSI-2 cameras without using I2C, e.g., using UART to I2C bridge to configure CSI-2 camera from user space, using FPGA to configure CSI-2 cameras, using RPi to configure CSI-2 cameras.
If CSI-2 cameras already configured using other means and produce CSI-2 data streams, how to write V4L drivers to capture video frames?