Are you sure that's not his mother in law? I've seen it referenced multiple places that his father is black and his mother is white.
https://thelab.bleacherreport.com/shaka-smart-wreaking-havoc-college-basketball/
"Shaka's mother somehow managed to fill both parental roles, and her father, Walter King, became a pivotal patriarchal figure. Monica King had a knack for flooding each son with enough attention to make him feel like an only child, even as she worked dual jobs. King, who is white, sought opportunities for Smart to immerse himself in the black community, doing her best to unearth culture in small-town, middle America. She wanted him to know his background, figuring a shielding of his identity would lead to a crisis later in life."
https://www.espn.com/mens-college-basketball/tournament/2011/columns/story?columnist=forde_pat&id=6276122
"There has been much to fight and much to prove in Smart's life.
Born to an African-American father and a white mother, he was too black for some in his hometown of Oregon, Wis.; too white for others."