It is not fully open. (http://linux-sunxi.org/CedarX). Partial code was published a year and a half ago, but the video engine still isn't supported. Their GPUs are Mali, as well, which is still a large obstacle in running a modern kernel.
Not to mention that all the code they published was as code dumps, some was under unclear licensing, and it's never on a remotely modern kernel, so it requires heavy porting. But yeah, they did release the code after years of complaints about GPL violations.
Giving a company credit for community efforts is kind of misleading.
