Description
Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 21.3 and above, you can generate and compile a design with the Intel® Stratix® 10 FPGA LVDS SERDES IP with the rx_dpa_hold pin when the RX SOFT-CDR mode is selected.
Resolution
You may ignore the rx_dpa_hold pin and leave it unconnected.
This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition Software.