Basically this DRM driver plus the companion Panfrost Gallium3D driver merged into mesa 19.1 will enable blob-free 3D graphics on the C201 and other devices that use this chipset.
Right now the DRM kernel driver does not support X11, so it'll be a few more releases before I can really take advantage of it. I have successfully installed it along with and run the kmscube demo outside of X. Pretty exciting development.
With Panfrost, every component of the C201 except the BCM4354 WiFi chip becomes libre. Cypress bought out a division of Broadcom and started releasing datasheets on a bunch of WiFi chips including the BCM4354, which they now tag as CYW4354. (PDF: https://www.cypress.com/file/298141/download)
Not sure if that makes it easier or any more realistic to get blob-free firmware for this chip. I can only hope.
Now GPU acceleration will be achievable via open source.
You can run ARM based Linux distros on them (such as Armbian). Up to now, most people use the ARM proprietary blobs to get OpenGL ES acceleration working on those things.
The message says there's two drivers:
"Lima covers the older t4xx and panfrost the newer 6xx/7xx series"
My perception is that Mali GPUs were just in Android phones where running where it's generally not possible to run a vanilla kernel or the bootloader is locked.
Any dev boards?