Radeon DPM Is Now Working Well For New AMD GPUs
Alex Deucher has improved the Radeon Dynamic Power Management (DPM) open-source driver support so it now works more reliably on newer AMD GPUs.
The Radeon power management initialization order was changed around to accomodate requirements for newer hardware. After the new 18 Radeon DRM kernel driver patches have been applied, AMD "Sea Islands" GPUs now work reliably and DPM is enabled by default.
The patches also improved power-gating for CIK / Sea Islands GPUs but it isn't yet flipped on by default.
The 18 new Radeon DPM patches rework a couple hundred lines of the kernel driver's code and can be found on the dri-devel list and these changes will most likely be merged for the Linux 3.14 kernel.
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