On Wed, Mar 18, 2015 at 02:23:01PM +0530, Ramalingam C wrote: > cc += intel-gfx > > On Wednesday 18 March 2015 02:12 PM, Ramalingam C wrote: > >Hi, > > > >Is there anyway I can test the front buffer tracking? > > > >On latest drm-intel-nightly, I am observing that when ubuntu bootsup after > >few secs (like ~15Secs) > >there no call from intel_fb_obj_invalidate() to invalidate the drrs. > > > >But system is healthy and FBs are keep changing. But no notification to > >DRRS for FB status change. > > > >I have verified this by observing the busy_frontbuffer_bits from > >/sys/kernel/debug/dri/0/i915_drrs_status. This bit is not changing at all. > >Hence DRRS is stuck at DRRS_LOW_RR itself. > > > >Is it known valid issue? Or am I doing something wrong.!? Yeah that shouldn't happen indeed. Unfortunately we've created the frontbuffer code for fbc/psr, and that code is still not yet enabled by default. So testing for frontbuffer tracking is probably too thin. And we still discover corner-cases in the frontbuffer tracking logic. So "just" tracking down what's going and fix it. Plus perhaps we do indeed need a DRRS testcase to exercise these corner-cases and check that the kernel does correctly switch between low and high modes. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
