[Intel-gfx] New " Unclaimed read from register 0x1f0034" in 4.12-rc1

[Jani Nikula]

On Thu, 18 May 2017, Hans de Goede <hdegoede at redhat.com> wrote:
> 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:

Replying to an old mail, the bug report is
https://bugs.freedesktop.org/show_bug.cgi?id=101705

BR,
Jani.


>
> [   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
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-- 
Jani Nikula, Intel Open Source Technology Center