On Don, 2011-12-08 at 19:35 +0800, chenhc@xxxxxxxxxx wrote: > > I found CP_RB_WPTR has changed when "ring test failed", so I think CP is > active, but what it get from ring buffer is wrong. CP_RB_WPTR is normally only changed by the CPU after adding commands to the ring buffer, so I'm afraid that may not be a valid conclusion. > Then, I want to know whether there is a way to check the content that > GPU get from ring buffer. See the r100_debugfs_cp_csq_fifo() function, which generates the output for /sys/kernel/debug/dri/0/r100_cp_csq_fifo. > BTW, when I use "echo shutdown > /sys/power/disk; echo disk > > /sys/power/state" to do a hibernation, there will be occasionally "GPU > reset" just like suspend. However, if I use "echo reboot > > /sys/power/disk; echo disk > /sys/power/state" to do a hibernation and > wakeup automatically, there is no "GPU reset" after hundreds of tests. > What does this imply? Power loss cause something break? Yeah, it sounds like the resume code doesn't properly re-initialize something that's preserved on a warm boot but lost on a cold boot. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
