A person familiar with what happened told The Associated Press that Smith's workout took place on campus Friday. The person said Smith had dinner Thursday night with numerous team officials, including general manager Buddy Nix and coach Doug Marrone.
The person spoke on condition of anonymity because the Bills would not reveal any details except to announce the workout had been scheduled.
Smith is regarded as one of the top quarterback prospects available in next month's draft. The Bills open their draft with the eighth pick and have a clear need at quarterback after releasing starter Ryan Fitzpatrick last week.