Enabling PowerVR GPU Support on RISC-V TH1520 SoC Through Kernel Driver Development
By
michalwilczynsk
Sesame, salt, and substance. A flagship bake.
Summary
The article details the technical process of enabling PowerVR GPU support on RISC-V platforms, specifically the T-HEAD TH1520 SoC used in the Lichee Pi 4A. It explains how the author wrote missing kernel drivers to make the upstream drm/imagination driver usable on RISC-V, overcoming the historical reliance on out-of-tree vendor drivers. The content covers the technical challenges of hardware enablement, kernel plumbing, and 3D rendering capabilities on this emerging architecture.
Key quotes
· 4 pulledFor years, PowerVR GPUs ubiquitous in the embedded world relied entirely on out of tree vendor drivers (often named pvrsrvkm).
That changed when Imagination Technologies announced their commitment to an upstream, open source driver.
The resulting drm/imagination driver has been upstream for some time, but it wasn't usable on RISC-V platforms like the T-HEAD TH1520.
How I enabled the PowerVR GPU on the TH1520 SoC by writing the missing kernel drivers.
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