On Mon, Jun 15, 2015 at 12:25:10PM +0200, Daniel Vetter wrote: > On Mon, May 25, 2015 at 08:04:45PM +0200, Dominik Brodowski wrote: > > Hey, > > > > this just popped up in the dmesg of my Dell XPS 13 -- the system seems to > > run well, but still, it asks about being cut and sent, so here it is. It is > > on 4.1.0-rc4+ (Linus' tree as of May 24th, around 3pm UTC -- don't have the > > git commit ID anymore). > > Can you please boot with i915.mmio_debug=10 and try to reproduce the > issue? It won't help. To see this WARN implies that hsw_unclaimed_reg_detect() fired and mmio debugging is enabled, and the WARN then fires before a subsequent register access. So it implies the unclaimed register is not being accessed by the display driver -- presuming that we have wrapped all register access appropriately. <invalid register access> hsw_unclaimed_reg_detect -> fires, clears the invalid flag ... ( hsw_unclaimed_reg_debug before mmio hsw_unclaimed_reg_debug after ) -> nothing x N ... <invalid register access> hsw_unclaimed_reg_debug -> fires before, ergo no more useful information Or else I nerfed the automatic debugging too much. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
