On: Building a 64-bit aarch64 kernel and userspace for...

[Vogtinator]

The GPU has nothing to do with what the OS on the CPU is doing - it's an entirely separate architecture anyway (VideoCore 6 on RPi4).

The reason their /opt/vc stuff doesn't support 64bit is because there are proprietary binaries directly from Broadcom. Also, they use interfaces provided only by the downstream RPi kernel.

There is a blog post from the RPi foundation about support for VC6 in Mesa.

[the-dude → Vogtinator]

What do you exactly mean by "/opt/vc" stuff? OpenGL?

Because I am decoding, encoding and rendering 1080p H264 with the VC on a 64-bit kernel.

[mkolassa → the-dude]

Things like vcgencmd that allow you to read and write values to the GPU OS that actually controls the physical hardware.