1080P resolution - DirecTV

I have a couple of TVs that qualify as HDs. One is attached to my main box and the other to my Genie.
I have verified under settings that both are acceptable but neither are selectable under the format button.
Both only go as high as the 1080i even though both are set to 1080P.

What am I missing here?

This question, "1080P resolution," is about DirecTV channels, programming, equipment, and sports.