GTH and GTP transceivers need additional reset sequencing for production silicon. The reset sequencers for GTRXRESET, RXPMARESET, and RXRATE are instantiated in the <component_name>_gt.v[hd] module. These modules need exclusive access to the DRP interface of the transceiver. The DRP_BUSY_OUT signal that is synchronous to the DRPCLK indicates that you cannot access the DRP interface. You should implement a DRP arbitration scheme to ensure smooth operation of the various reset sequencers. In the current design, the GTRXRESET sequencer takes highest priority.