[eigenspace]

The iPhones had GPUs too. As far as I'm aware, the GPU design in the M-series chips are directly descended from the iPhone GPU in the exact same way the CPU is.

[chocochunks]

Prior to the A11 chip they used PowerVR designed GPUs. They weren't done in house.

[rangestransform]

Based on Alyssa Rosenzweig’s reverse engineering, the current GPUs are still descended from PowerVR IP

[eigenspace]

Ah I see, good to know.