What distro does Tesla use?

I'm curious to know, what distribution of Linux does Tesla utilize for their software development and operations? It's intriguing to consider the technical choices made by such a pioneering company in the automotive and renewable energy industries, especially when it comes to their use of open-source software. Do they opt for a popular, well-established distro, or do they have a custom-tailored solution to meet their specific needs? The answer could provide valuable insights into the inner workings of one of the world's most innovative companies.