Main link video should not be enabled until a proper video source has
been provided to the source core. Typically the source device wants to read the EDID
from the attached sink device to determine its capabilities, most importantly its
preferred resolution (and other supported resolutions if the preferred mode is not be
available). When a resolution has been determined, set the Main Stream Attributes in the
source core (
0x1B0). Enable the main stream (
only when a reliable video source is available.
0x0C0before the main link is enabled to reduce the amount of time after startup needed to align the scrambler/de-scrambler.