I have generated a UHD-SDI GT with 4 link configuration, but only the first link is working.
QPLL lock is only driven to the first GT channel.
What can cause this problem?
This is a known issue that occurs in the multi-link configuration of the UHD-SDI GT Core.
The only affected version is UHD-SDI GT v1.0 (Rev 3) in Vivado 2018.3.
It can be worked around by using the 2018.3 UHD-SDI GT Patch in (Xilinx Answer 72075).