ID:15941 dqsin input of DQS delay chain "<name>" must be driven by an uninverted o output of I/O input buffer.

CAUSE: The dqsin input of the specified DQS delay chain must be driven by an uninverted o output of an I/O input buffer.

ACTION: Change the design so that the dqsin input is driven by an uninverted o output of an I/O input buffer.