Hi everyone, Sorry for double posting, but I originally sent this to the old mailing list. Here it is: I have a couple of comments / suggestions regarding the part on controls of the V4L2 api: Some controls, such as pan relative and tilt relative are write-only, and reading their value makes little sense. Yet, there is no way of knowing about this, but to try and read a value and be greeted with EINVAL or similar. There is already a read-only flag (V4L2_CTRL_FLAG_READ_ONLY) in struct v4l2_query. Does it make sense to add another one for write-only controls ? The extended controls Pan / Tilt reset are defined in the API as boolean controls. Shouldnt these be defined as buttons instead, as they dont really hold a state (enabled/disabled) ? Comments are welcome. Cheers, Gilles -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html