Is AMD completely and utterly committed to making open source drivers? Hell no, for one thing they'd like to stay in business. Sure, they could just post the full source of their proprietary driver here, they'd only get sued to oblivion and have all their graphics cards blacklisted. So because they're not doing that, they're not trying. *rollseyes*
You are starting your raving at the completely wrong end. AMD doesn't have any benefit from DRM, if it all magically went away they'd sell graphics cards like before. Maybe even more. It starts with Hollywood, they want DRM. They pressure Microsoft and say either you accept DRM, or Windows won't play BluRays - only standalone players. So Microsoft turns around and says okay, to get the Windows logo the graphics card must implement DRM. And if you want to deliver to 95% of the market, actually 99% because it's same with Apple then you say yes. What do you want from AMD, corporate suicide? Make Hollywood stop demanding DRM, then AMD will stop delivering it. If not, Hollywood will go to someone who will.