Nobody is complaining about code not being provided. It’s more the schematics that are sitting in a drawer in Cupertino that would make the painstaking reverse engineering unnecessary. Someone at Apple would have a much easier time.
Not every project needs to be a reverse engineering project, and the future looks pretty bleak if getting Linux to work on every new computer turns into one. Hopefully this remains an Apple problem with their proprietary crap.
GPU firmware interfaces being proprietary and heavily guarded secrets is in no way whatsoever an Apple thing. Even the Raspberry Pi is in much the same boat.
Most of the time it’s an upstream vendor NDA. In Apple’s case they own the whole stack for the GPU so that doesn’t apply here. But it’s certainly not special to not divulge GPU internals.
