DRA77P: how to save power like reducing SGX on the fly

Part Number: DRA77P

HI everybody , 

please I m on a cluster app , so I need to be lowest power as possible .

in my case SGX is used not so often , so one idea  would be to  save is possible power on it .

question  how can I do ?  should I  change  SGX clock , reducing it when not in use ?

is this not needed since SGX even if at high clock  will not consume if not in use ? 

I m in Linux , so I cannot shutdown totally , to avoid  restarting graphics etc 

any suggestion /idea ?

thank you

regards

Carlo