No HDMI out from 4K 85" Sony

HDMI from the Sony TV goes to a Bryston SP3 processor, but the SP3 sees no HDMI input and consequently there is no audio.  All the HDMI ports of the TV seem to be inputs, even HDMI 3 (eARC).  Video input to the TV via HDMI from the Ayre DX-5 DSD disc player works fine.  Is there a switch that needs to be set for HDMI output?