Definitions
Surface: a memory buffer containing pixel data.
Plane: a hardware unit that can supply pixel data from a memory buffer to the blender, performing certain transformations on the data in the process. Different kinds of planes have different transformation capabilities and support different pixel formats.
Flipping: the act of changing the surface that will provide pixels to a given plane.
Display pipe: a data path in the VDC with an associated timing generator, through which blended video output is clocked according to the framing established by the timing generator.
Port: a connection from which external hardware can receive the output of a display pipe. A port may have additional hardware associated with it (e.g., TV encoder or HDMI transmitter) to further transform the pixel data.
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