Chris Brown -- D.A. Moves to REVOKE PROBATION In Rihanna Beating Case [UPDATED]

1:26 PM PT -- How's this for crazy ... sources tell TMZ, the lawyer for the victim in Chris Brown's hit-and-run case will be in court this afternoon to SUPPORT Brown against the D.A.'s allegations the singer violated his probation.

As we reported, the victim does NOT want Chris to go to prison over the car accident -- and her lawyer is prepared to say that in court today.

12:08 PM PT -- Chris Brown isn't happy ... he just tweeted, "I did everything I was suppose to do during the so called hit n run, I provided the correct info. There were no injuries or damages. C'mon!!"

Chris Brown is in HOT WATER -- because we've learned the L.A. County District Attorney has just filed legal docs asking the judge in the Rihanna beating case to REVOKE HIS PROBATION.

According to the docs, obtained by TMZ, the D.A. is asking for the revocation based on charges being filed against Brown in connection with a hit-and-run last May. Brown left the scene without forking over a California driver's license and proper insurance info.

The D.A.'s legal docs claim Brown "willfully and unlawfully" broke the law in the hit-and-run case. And, law enforcement sources tell us, even if the L.A. City Attorney ultimately agrees to drop the hit-and-run case because the victim doesn't want Brown prosecuted, the D.A. will press on because Brown has a duty to obey all laws as a condition to his probation.

The D.A.'s documents asks the judge to revoke his probation and immediately remand him into custody. But we've learned that's a standard request and when the D.A. goes to court today at 1:30 PM PT, they will not ask the judge to haul Chris to the pokey.

If the judge finds that Chris violated his probation, he faces 4 YEARS IN PRISON.