As you probably already know, Collabora develops an open-source OpenGL driver for ARM Mali GPUs (Midgard and Bifrost), called Panfrost.
The driver received quite some attention from developers during the past year, including OpenGL ES 3.0 and OpenGL 3.1 support. Now Collabora also wants to provide an open-source Vulkan driver for ARM Mali Bifrost and Midgard GPUs, so they unveiled today a preview of this driver, called PanVk, which will be delivered through the well-known Mesa graphics stack on Linux-based operating systems.