This PR implements the set_signal callback from the video API.
A signal registered on VIDEO_EP_OUT raises once a new image has
been received completely.
Signed-off-by: Armin Kessler <ake@espros.com>
Since all video drivers in tree use a full frame, their video buffers
will always start at a line_offset of 0 within the frame.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Update existing video drivers to handle the min/max line count field
within the video_caps structure. All drivers work with full frames
currently, so use the special LINE_COUNT_HEIGHT value to indicate this.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
