Where to report Mali OpenGLES bugs?

Hello

As some of you know I created a team of ARM Chromebook hackers on Launchpad. We concentrate on getting misc things working on those devices.

One is Mali T604 OpenGLES driver. It works but there are some bugs in it. The problem is: where to report them? As Chromium OS bugtracker is not proper place as our use cases are different than their.

https://bugs.launchpad.net/chromebook-arm/+bug/1085596 is an example showing that if you run two applications using OpenGLES then you have screen artifacts. Or if you run WM with compositing and any OpenGLES application (glgears-es2 is enough).

Can someone from Linaro Multimedia team or ARM Multimedia team suggest option?