EXCLUSIVE

Sources close to Chris tell TMZ ... the singer is copacetic over the duo rekindling their romance. Chris has his mind on his money ... focusing on making a comeback.
You'll recall ... all the quien es mas macho over Rihanna triggered an all-out war at WIP nightclub in NYC back in 2012 ... when the Brown/Drake posses got into a bottle throwing fight.
TMZ broke the story ... doctors at the rehab facility where he just finished a 90-day stint have diagnosed the singer with bipolar disorder.
Maybe the meds are working.