The poster of the question is a developer. I answered to help get the information he asked for, not have my answer graded on completeness or lack thereof with a curt "Not enough".
No hardware developer in the consumer space charges developers to access their hardware. Spec owners frequently do charge other companies to implement their specs, though.
Intel has a mixed record on this - some specs - like USB - they have led but have been implementable licence free.
Other things they consider their propriety interfaces and have sued over - see the recent lawsuits between Intel & Nvidia over their memory bus.
So it is very reasonable to wonder if Nvidia and AMD are going to be able to implement this freely, or are they going to have to pay a tax to Intel. As far as I can see your answer doesn't address that question at all.