On Thu, Dec 04, 2014 at 06:09:39PM +0200, Imre Deak wrote: > When changing the sysfs GT min/max frequencies, the kernel won't > explicitly change the current frequency, unless it becomes out of bound > based on the new min/max values. The test happens to work on non-VLV > platforms because on those the kernel resets the current frequency > unconditionally (to adjust the RPS interrupt mask as a side-effect) and > that will lead to an RPS interrupt setting the minimum frequency. > > To fix this load the GPU after decreasing the min frequency and before > checking the current frequency. This should set the current frequency to > the minimum. > > Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> Isn't this a kernel bug which should be fixed in the kernel? If userspace changes the requested freq, the kernel should obey right away. Not somewhen later when something happens ... -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
