DETROIT (AP) — General Motors says it is paying $2.1 billion to buy out Japanese tech investment firm Softbank’s stake in the Detroit automaker’s Cruise autonomous vehicle subsidiary. Softbank paid $2.25 billion for a 20% stake in Cruise in 2018 part of a wave of investment in self-driving technology. GM also said Friday that it is making an additional $1.35 billion investment in Cruise. GM acquired a majority stake in Cruise in 2016. Cruise operates a small fleet of autonomous vehicles in San Francisco that it opened to the general public at the beginning of February. GM expects to get a permit to charge passengers for autonomous rides this year.