While adding more hardware support and functionality to soc-camera, it became apparent, that its cropping / scaling concept was wrong. Trying to fix the situation by reading the API specs and trying to understand it revealed, that the documentation is indeed quite cumbersome and that even experienced V4L kernel developers do not understand completely how VIDIOC_S_CROP and VIDIOC_S_FMT ioctls shall configure cropping and scaling in camera drivers. As the situation slowly clarifies all soc-camera drivers and the core have to be modified to comply with an interpretation of the V4L2 API, which will hopefully result from the currently running on the mailing list
discussion.
