> > > r100 init hangs in a different place. Original dmesg first, then my > > > instrumented dmesg (seems to get further): > > > > The instrumented dmesg had a couple of my local test changes and was > > bad now that I had ROM. Reverted them exept my readb changes (instead > > of direct dereferences of iomapped space) and redid > > logging to be more precise. > > > > > [drm] radeon kernel modesetting enabled. > > > PCI: Enabling device: (0000:02:02.0), cmd 82 > > > [drm] initializing kernel modesetting (RV100 0x1002:0x5159 0x1002:0x0908). > > > [drm] register mmio base: 0x10000000 > > > [drm] register mmio size: 32768 > > > [drm:radeon_device_init] *ERROR* Unable to find PCI I/O BAR > > > > This was still the unchanged kernel hanging. > > > > Below is a new debug log to pinpoint the hang. It seems to hang in > > r100_gfx_get_rptr but not on first try. > > It's most likely hanging in readl() in r100_mm_rreg() then.
Yes, it is doing direct readl() there. But what does this hang mean? By the way, I get these warnings from r100. Seem to be unrelated but still worth reporting IMHO: CC [M] drivers/gpu/drm/radeon/r100.o drivers/gpu/drm/radeon/r100.c: In function ?r100_bandwidth_update?: include/drm/drm_fixed.h:64:13: warning: ?crit_point_ff.full? may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/radeon/r100.c:3149:63: note: ?crit_point_ff.full? was declared here drivers/gpu/drm/radeon/r100.c:3573:42: warning: ?disp_drain_rate.full? may be used uninitialized in this function [-Wuninitialized] -- Meelis Roos (mroos at linux.ee)
