I have to chime in here - my father-in-law purchased the HTR 6230 to use with his LG LCD LED TV, PS3, cable box and Roku Player. I spent quite a bit of time consolidating everything into the receiver before discovering that the HTR 6230 DOES NOT decode HDMI audio. No way around it.
Here's the work around that I found, and it is truly a work around, not a viable solution -
Connect all AV devices into the TV, run a single optical out into the DTV optical in. There are only two optical ins for the 6230, and only the DTV optical input will attempt to decode surround sound. You then can swap around your TV inputs to get sound piped to the receiver.
This works. It ain't pretty, and certainly is not ideal. If you are stuck with this receiver though, it's probably your best bet.
I'm going to try returning this receiver because I think it's absurd to offer HDMI inputs without full HDMI functionality. But that's just me as a consumer wanting technology that's actually worthwhile.