This adds dynamic engine reclocking when engine doesn't work too much. I calculate amount of not processed commands using fences. If that is 0, I set planned action to DOWNCLOCK with some delay. If that amount is bigger than 3 (just some my guess) i set planned action to UPCLOCK (with delay).
This keeps my engine downclocked when just using KDE or even starting glxgears. When playing openarena this upclocks my engine. I didn't notice any serious regression in openarena demo (I don't cound 0.5FPS drop). Please try this patch and developers please comment. After applying this you have to load radeon module with parameter dynclks modprobe radeon dynclks=1 To confirm you applied patch, recompiled kernel and used parameter try: dmesg | grep "dynamic" TODO: - calculate minimum engine clock using AtomBIOS data - avoid ~10 horizontal black lines when reclocking LATER: - wait for IRQ support, add memory reclocking - add voltage changing - consider other heuristics (more aggressive reclocking?) -- Rafał
0001-drm-radeon-kms-pm-add-non-aggressive-dynamic-engine-.patch
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