jock2 When people first went looking for the SSV6051P driver some sources were found on GitHub and there was a theory the chip was a clone of a Realtek part. Some of the sources had a bash script for changing what appeared to be realtek IDs for SSV ones, and sources had similar structure to old(er) Realtek drivers. I forget the details now, esp. what Realtek chip was hinted, but someone attempted to recreate the same process and didn't get anywhere with it. Not that suprising really.. and the whole Realtek theory could be a red-herring.
Also for background: One of the Rockchip devs (these days ex-Rockchip, but native Mandarin speaker) did some research for us a couple of years ago and told us SSV went bust in 2016, but the assets appear to have been acquired by icomm, and 新闻资讯-深圳市南方硅谷半导体有限公司 shows blog/post activity dated from April 2020 - and since I last looked at their site (a couple of years ago) a range of new chips appears to have appeared. The icomm website claims the company started in 2018.
If the idea of a rewrite ever moves beyond the idea stage keep us posted. We'd be keen to offer support; even if only the moral kind