brightness control is not working anymore windows 10 bootcamp

hey i have a MBP mid 2015 with AMD Radeon R9 M370X , i've just installed windows 10 from boot-camp, i installed the win updates and drivers updates for the amd , but am not able to control the brightness of the screen with keys or anything else even in control panel , and I've noticed that the Intel iris graphic card is not recognized in device manager only the amd card , so do you have any idea pleas ??