Hi,
On 18-05-17 14:31, Chris Wilson wrote:
On Thu, May 18, 2017 at 02:20:09PM +0200, Hans de Goede wrote:
Hi,
So while trying to reproduce my previously reported
"RPM wakelock ref not held during HW access" in 4.12-rc1 ?"
Bug, to test the possible fixes I encountered a new
"RPM wakelock ref not held during HW access" error combined
with a "Unclaimed read from register 0x1f0034" error:
Which I believe is a new issue in 4.12-rc1 I've tried adding
i915.mmio_debug=99 to the kernel cmdline and then I get the
same unclaimed read error 3 times for a single resume.
[ 69.462566] Suspended for 3.099 seconds
[ 69.463092] PM: resume from suspend-to-idle
[ 69.489870] PM: noirq resume of devices complete after 26.368 msecs
[ 69.490177] RPM wakelock ref not held during HW access
[ 69.490355] ------------[ cut here ]------------
[ 69.490441] WARNING: CPU: 1 PID: 2003 at drivers/gpu/drm/i915/intel_drv.h:1780 intel_init_vebox_ring_buffer+0x3753/0x4cb0 [i915]
...
[ 69.491022] RIP: 0010:intel_init_vebox_ring_buffer+0x3753/0x4cb0 [i915]
...
[ 69.491089] Call Trace:
[ 69.491152] intel_gvt_init_cmd_parser+0x25a/0x360 [i915]
Ok, so after rebuilding everything I get more sensible results,
the "RPM wakelock ref not held during HW access" error now is
the same one as I reported before in the
"New "RPM wakelock ref not held during HW access" in 4.12-rc1 ?"
thread. Now that I can reproduce it again, I will try the fixes
suggested there.
The "Unclaimed read from register 0x1f0034" error now has this
stacktrace:
[ 56.955016] PM: early resume of devices complete after 1068.631 msecs
[ 56.956396] pcieport 0000:00:1c.0: System wakeup disabled by ACPI
[ 56.957697] rtc_cmos 00:04: System wakeup disabled by ACPI
[ 56.958261] Suspended for 0.888 seconds
[ 56.964250] Unclaimed read from register 0x1f0034
[ 56.964347] ------------[ cut here ]------------
[ 56.964428] WARNING: CPU: 2 PID: 1799 at drivers/gpu/drm/i915/intel_uncore.c:801 __unclaimed_reg_debug+0x4e/0x60 [i915]
...
[ 56.964590] Workqueue: events_unbound async_run_entry_fn
[ 56.964594] task: ffff89ad698b0000 task.stack: ffff9ba401454000
[ 56.964662] RIP: 0010:__unclaimed_reg_debug+0x4e/0x60 [i915]
...
[ 56.964688] Call Trace:
[ 56.964758] fwtable_read32+0x17a/0x1d0 [i915]
[ 56.964818] vlv_program_watermarks+0x3c4/0x610 [i915]
[ 56.964883] ? intel_hdmi_get_hw_state+0x27/0xd0 [i915]
[ 56.964941] vlv_optimize_watermarks+0x95/0xb0 [i915]
[ 56.965008] intel_atomic_commit_tail+0x2e2/0x1030 [i915]
[ 56.965016] ? tracing_record_cmdline+0x32/0x120
[ 56.965022] ? __schedule+0x23e/0x860
[ 56.965090] intel_atomic_commit+0x399/0x4b0 [i915]
[ 56.965125] ? drm_atomic_check_only+0x37f/0x540 [drm]
[ 56.965155] drm_atomic_commit+0x4b/0x50 [drm]
[ 56.965174] drm_atomic_helper_commit_duplicated_state+0xc2/0xd0 [drm_kms_helper]
[ 56.965245] __intel_display_resume+0x85/0xc0 [i915]
[ 56.965312] intel_display_resume+0xf7/0x120 [i915]
[ 56.965370] i915_drm_resume+0xe1/0x180 [i915]
[ 56.965427] i915_pm_resume+0x1e/0x30 [i915]
[ 56.965434] pci_pm_resume+0x65/0xa0
[ 56.965440] dpm_run_callback+0x57/0x140
[ 56.965444] ? pci_pm_thaw+0x90/0x90
[ 56.965447] device_resume+0xe1/0x200
[ 56.965450] async_resume+0x1d/0x50
[ 56.965455] async_run_entry_fn+0x39/0x170
[ 56.965460] process_one_work+0x193/0x3c0
...
[ 57.062736] PM: resume of devices complete after 107.709 msecs
[ 57.063468] PM: resume devices took 0.108 seconds
[ 57.063478] PM: Finishing wakeup.
Regards,
Hans
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
