This section contains debugging steps if the clock recovery or channel equalization is not happening at sink.
- Try with a different source such as the DisplayPort Analyzer.
- Change the cable and check again.
- Put an AUX Analyzer in the Receive path and check if the various training stages match with those mentioned in DisplayPort Overview.
- Probe the
lnk_clkoutput and check the SI of the Clock is within the Phase Noise mask of the respective GT.
- Check the RX Initialization Status register (
0x0028) and PLL Lock Status (
0x0018) register of the Video PHY Controller for Reset done and PLL lock for the active lanes.
- Check the
0x440registers for Symbol_Locked, Channel Equalization, and Clock Recovery Done.