On Fri, Oct 11, 2013 at 04:31:38PM +0200, Mario Kleiner wrote: > Daniel, Ville, > > i tested Ville's patch series for the scanoutpos improvements on a > GMA-950, on top of airlied's current drm-next branch. > > There's one issue: The variable "position" in > i915_get_crtc_scanoutpos() must be turned from a u32 into a int, > otherwise funny sign errors happen and we end up with *vpos being > off by multiple million scanlines and timestamps being off by over > 60 seconds. > > Other than that looks good. Execution time is now better: > > Before uncore.lock addition: 3-4 usecs execution time for the > scanoutpos query on my machine. After uncore.lock addition > (3.12.0-rc3) 9-20 usecs, sometimes repetition of the timing loop > triggered. After Ville's patches down to typically 3-8 usecs, > occassionally spiking to almost 20 usecs. > > I'll make my patches for the realtime kernel + increased accuracy on > top of drm-next + Ville's patches. So official reviewed-by/tested-by from you on Ville's latest patches in this thread? -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
