Rob shared this milestone for his ARM SoC open-source graphics driver on his blog. Right now this code is living on a GitHub branch but will be merged into mainline Mesa in due time for this reverse-engineered Qualcomm driver. The mainline Gallium3D driver at this point is supporting the Adreno 200 series quite well.
Other hardware where the Adreno A320 is found besides the Nexus 4 is the LG Optimus G, Sony Xperia SP, ZTE Grand S, Sony Xperia Z, and many other Snapdragon S4 Pro mobile devices.
For other updates on the state of Freedreno, see my many other articles on the topic.