Novice alert

Need some interconnect guidance guys!
Purchased both Denon avr 2105 & dvd 2910. Connecting dvd to tv (Sagem HD-D45) using dvi-i and digital coaxial then tv to amp using digital coaxial to prevent lip sync probs.
Q. Is it possible to also connect dvd via digital Toslink direct to avr to allow CD audio playback with tv in "off mode" ? or is this just NOT DONE!
This means both digital connectors will be in use, but not simultaneously. I have noticed that in the manual diagrams it says you can use either "or" not both.
Why are manuals so complicated
cheers in advance for any advice.
^w^