I saw a moment ago that opdenkamp pushed some changes to libCEC involving the RPi. I don't know if it already works, but compiling should be not too hard I guess.
This commit holds the changes:
https://github.com/Pulse-Eight/libcec/c ... fe2aa58135
And it can be found in this tree for the moment: https://github.com/Pulse-Eight/libcec/t ... fe2aa58135