I've just hooked up an Onkyo TX-RZ810 to my Sony XOBR-Z900A. I'm trying to patch my Amazon Fire throught the "StreamBox" input of the Onkyo, which supports HDCP2.2. However, the signal won't be decoded. There is only one HDMI HDCP input on the Sony. The Onkyo feeds its signal through the ARC connection on the Sony. Is this the reason is won't decode? Does there have to be HDCP support on both ends--in this case the Onkyo and the Sony TV?