@veye_xumm
I have conducted some more experiments with another similar board, different kernel versions, with some electrical adapter modifications and a much shorter 31-pin FFC cable. The issue is exactly the same however.
I think the problem is probably in my adapter board, less likely in a board layout itself. I am considering making and FPC for direct connection from sensor to camera like ones that you now offer for Firefly boards.
Do you have any recomendations on a FPC cable design? And could you please confirm the 22-pin connector pinout featured on the GX-MIPI-IMX662 Data Sheet page (as I have seen both reset_gpio and pwdn_gpio pins in the driver source code where the page mentions only PWR_ENABLE).