Did you enable the camera via the 'uEnv.txt' variable??
aka "camera=li5m03"
Then in ubuntu/debian: run this script:
https://raw.github.com/RobertCNelson/tools/master/pkgs/aptina-media-ctl-n-yavta.sh
and then run this script to "test" capture:
https://raw.github.com/RobertCNelson/tools/master/pkgs/aptina-test-capture.sh
Regards,