For non-frame buffer designs, the DisplayPort receiver core requires the generation of a video stream using the M and N values within the Main Stream Attributes to reconstruct an accurate stream clock. The DisplayPort Receiver core places this information on dedicated signals and provides an update flag to signal a change in these values. The following figure shows how to use the M and N values from the core to generate a clock. See section 2.2.3 of the DisplayPort Standard v1.2a for more details.
Recommended: The AMD MMCM
is not accurate enough to be used to regenerate the necessary clock for non-frame buffer
design. You need to use an external PLL that meets the requirements of the DisplayPort
Standard. See section 2.2.3 of the DisplayPort Standard
v1.2a for more details.
Figure 1. Receiver Clock Generation
