Were the CTS tests and OpenGL tests executed on the L5.0.0_1.0.0-ga?
I was not able to find the test reports, but I found some hints that there were several bugfixes in order to pass some CTS tests: Android L5.0.0_1.0.0 GA Release
In particular, I am interested if the OpenGL GPU test have passed, because I see some strange artifacts on i.MX6 BSP which do not exist on other hardware..