I'm interested too to see what happens there with TI after their decision to refocus on embedded. The Omap5 is an interesting chip as it contains a highly deterministic Cortex-m4 as well as an A15, though so far documentation is hard to find, so I'm not sure how they've tasked it, or how it's plugged into the peripherals. It's not a massive success, and the Imagination GPU is just as closed as the Mali, but its a way forward.
and the Imagination GPU is just as closed as the Mali
Imagination is much, much worse than Mali. Mali has been pretty much fully reverse engineered (see limadriver.org). Given that libv will finally publish his new Lima driver version with textures support etc, an oss GLES driver for the Mali is pretty close. The remaining difficulty is the shader compiler (especially the vertex ISA is a bit esoteric).
The PowerVR devices on the other hand.. their drivers (and hardware) are very byzantine, layer upon layer of obscure interfaces. Even the kernel drivers are closed/obfuscated. Therefore the reverse engineering project is going very slow. I don't understand how it is a way forward.
Lots happening.