Hi Neil
suggest to contact local FAE to obtain more details.
This gpu module is third party IP so info
about it and detailed documentation its registers is license protected.
Freescale provides gpu libraries in binary forms only for
customer usage. For gpu programming OpenGL ES/OpenVG APIs
are used. You can look for examples below
IMX_GPU_SDK
: Linux GPU SDK
Chapter 16 Graphics Processing Unit (GPU)
mx53_start_linux.pdf
IMX53_1109_LINUXDOCS_BUNDLE
Best regards
igor