I have a KCU105 connected to an AD9164_FMCC_EBZ and I'm operating in Subclass 1. I can get successful JESD link, but only occasionally an output.
Some combination of IRQ_SYSREF_JITTER, IRQ_DATA_READY and IRQ_LANE_FIFO are asserted but I've noticed IRQ_DATA_READY is the only one that indicates failure. I've had an output when IRQ_SYSREF_JITTER and IRQ_LANE_FIFO are asserted (tried clearing by writing 0xFF but doesn't always clear).
What could cause it to work sometimes?