I don't love the MBLY breakup, whoever caused it. They have clever hardware in their chips that make pattern recognition quick and efficient. For TSLA to brew their own, they would probably shift to a standard ARM-based processor and try to do a software solution. The problem is MBLY has shown pretty compellingly that they can outperform software solutions.
EyeQ® - Mobileye
The key strengths of the EyeQ® lie in its use of general CPUs (32 bit RISC ARM946E) and 4 patented Mobileye programmable ASIC cores – Vision Computing Engines (VCEs) – which are optimized for computing major time-consuming image processing tasks. All cores work in parallel to give the EyeQ unrivalled computing power in a small-package cost-effective processor specifically designed for the automotive vision based Driver Assistance Systems (DAS) market.