Question about which tools to use, bugs, the best way to implement a function, etc should go here. Don't forget to see if your question is answered in the wiki first! When in doubt post here.
BTW, are you aware that QEMU is emulating a graphics card, and doesn't give you access to the host card?
As I recall from your last topic on the matter, you have an nVidia graphics chip. So, if you want to develop a graphics driver for that thing, you are going to need access to documentation that nVidia only hands out on NDA. Which means you can't release the resulting source code. And you have to deal directly with nVidia, who might just brush you off. You might look at the nouveau source code, though. However, that is all pie in the sky, considering you haven't even got PCI enumeration to work.