Approaching twenty years after Intel’s Poulsbo platform began giving Linux users nightmares due to its Imagination PowerVR SGX graphics IP that blocked open-source 3D driver support, the GMA500 driver that ended up coming about to provide open-source display support at least is still seeing occasional upstream activity for the Linux kernel.
Intel Atom Poulsbo in netbooks and the like at the time were a very sore spot due to their PowerVR SGX graphics IP. While since then Imagination Tech has finally become more open-source friendly and since provided an upstream DRM kernel graphics driver and Mesa Vulkan driver for their newer PowerVR graphics IP generations, there wasn’t such treatment for the older PowerVR graphics IP found with Poulsbo Atoms. The Intel GMA500 DRM driver though has been providing open-source display driver support for years albeit improvements to it are increasingly rare.
Thomas Zimmermann of SUSE has worked through a set of patches to provide client buffer support for the GMA500 driver’s FBDEV emulation. A rare improvement for anyone still relying on these very old Atom processors. He explained with the patch series now working its way to the upcoming Linux 7.1 kernel:
“A client buffer holds the DRM framebuffer for an in-kernel DRM client. So far, gma500 has created an internal ad-hoc framebuffer for its fbdev emulation, while by-passing the regular interfaces used by user-space compositors.
Replacing the existing code with a client buffer allows for stream-lining gma500 code and later also the fbdev helpers. The new framebuffer will be registered against the client’s file and will support handles for GEM objects. This is then just another framebuffer within the DRM ecosystem.”
This clean-up to the frame-buffer handling for the Intel GMA500 driver was included as part of today’s drm-misc-next pull request of new material ready for introduction with the Linux 7.1 merge window in April.
So for anyone still using Intel Poulsbo hardware, the GMA500 display driver isn’t quite dead yet but it’s certainly past time to upgrade especially with the performance and power efficiency of today’s options like Panther Lake.
