If your TV supports ARC, you should be able to connect the Blueray to the TV via regular HDMI, and then connect the TV to the Amp via HDMI Arc. You can then play CD's "through" the TV to the amp. The downside is that you need to have your TV powered on when listening to CDs.
Alternatively, if for some reason the pass-thru approach above doesn't work, or you want to avoid powering the TV, there are cheap ($10-20) adapters that connect digital coax to toslink.
Lastly, you could rip all your CDs and put them on a USB thumb drive, put that in the USB port on the Amp, and you'd have 24/7 access to all your music library via Wiim's phone app. If you've got a significant collection, dbPowerAmp CD Ripper is sort of the defacto best/most-productive ripping SW tool and well worth the cost.