Hello, I am starting to work on a SuperH processor that has a graphics controller capable of overlaying three layers : * one video layer, where the video comes from a camera interface * two graphics layer A single hardware, controlled by a single set of registers, manages the whole graphics controller. At the moment, the kernel only has a framebuffer driver capable of outputting things on one graphic layer. I'd like to be able to use the video layer, in order to inlay the video coming from the camera into a graphical application. My understanding is that the Video 4 Linux subsystem will play a role in managing both the video input and the video output devices. However, I can't seem to figure out how the work is divided between the video input driver, the video output driver and the framebuffer driver. Do you have pointers, or example of drivers for similar devices ? Thanks, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com