Comment by david-gpu
Exactly this. What incentive does Qualcomm have to open source their code? Or NVidia, for that matter. And what are the risks?
OSS isn't this caricature good-vs-evil situation people sometimes imagine, it is all about economic incentives.
I think this is the wrong way around. There might be an economic incentive to keeping something closed source, for example having licensed other closed source code. And remaining in control without oversight also might be an incentive. But the incentive to making something open source is that someone might improve your work, making your product better. It is somewhat arrogant to assume that nobody else out there could possibly improve this code or add value. Just like it is arrogant to assume that your competitors don't already know your 'secrets' and haven't reverse engineered anything they found interesting.