Bug 112120

Summary: [CHT] Unclaimed write to register 0x1e0100
Product: DRI Reporter: Hans de Goede <jwrdegoede>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: RESOLVED WORKSFORME QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: not set    
Priority: not set CC: chris, intel-gfx-bugs
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: BSW/CHT i915 features:

Description Hans de Goede 2019-10-24 11:01:47 UTC 
I'm seeing an "Unclaimed write to register 0x1e0100" WARN_ON trigger with 5.4-rc3 on an Asus T100HA (after a suspend/resume cycle):

[  247.738558] ------------[ cut here ]------------
[  247.739115] Unclaimed write to register 0x1e0100
[  247.739349] WARNING: CPU: 0 PID: 2778 at drivers/gpu/drm/i915/intel_uncore.c:1098 skl_pcode_request+0xae1/0x74a0 [i915]
[  247.739363] Modules linked in: fuse bnep sunrpc vfat fat snd_soc_sst_cht_bsw_rt5645 mei_hdcp intel_rapl_msr intel_powerclamp gpio_keys coretemp kvm_intel kvm irqbypass intel_cstate asus_nb_wmi wdat_wdt pcspkr btsdio brcmfmac brcmutil joydev cfg80211 snd_sof_acpi snd_sof_intel_byt snd_sof_intel_bdw snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp snd_intel_sst_acpi snd_intel_sst_core hid_sensor_gyro_3d hid_sensor_magn_3d hid_sensor_rotation hid_sensor_incl_3d hid_sensor_accel_3d snd_soc_sst_atom_hifi2_platform hid_sensor_trigger hid_sensor_iio_common snd_soc_rt5645 industrialio_triggered_buffer snd_soc_acpi_intel_match kfifo_buf snd_soc_acpi industrialio snd_soc_rl6231 snd_soc_core mei_txe intel_xhci_usb_role_switch roles cros_ec_ishtp cros_ec processor_thermal_device hci_uart intel_rapl_common lpc_ich mei snd_hdmi_lpe_audio intel_soc_dts_iosf intel_atomisp2_pm snd_compress ac97_bus snd_pcm_dmaengine btqca btrtl btbcm snd_seq btintel bluetooth snd_seq_device snd_pcm intel_hid snd_timer snd
[  247.739687]  ecdh_generic ecc soundcore spi_pxa2xx_platform dw_dmac int3406_thermal int3403_thermal int340x_thermal_zone int3400_thermal soc_button_array acpi_thermal_rel intel_int0002_vgpio acpi_pad dm_crypt hid_sensor_hub intel_ishtp_loader mmc_block intel_ishtp_hid hid_multitouch crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i915(E) i2c_algo_bit drm_kms_helper drm hid_asus asus_wmi sparse_keymap uas rfkill usb_storage intel_ish_ipc intel_ishtp wmi video i2c_hid(E) sdhci_acpi sdhci mmc_core pwm_lpss_platform pwm_lpss i2c_dev
[  247.739914] CPU: 0 PID: 2778 Comm: kworker/u8:15 Tainted: G            E     5.4.0-rc3+ #188
[  247.739928] Hardware name: ASUSTeK COMPUTER INC. T100HAN/T100HAN, BIOS T100HAN.221 05/18/2016
[  247.739954] Workqueue: events_unbound async_run_entry_fn
[  247.740027] RIP: 0010:skl_pcode_request+0xae1/0x74a0 [i915]
[  247.740045] Code: 5d 41 5c 41 5d c3 45 84 ed 48 c7 c0 78 e0 58 c0 44 89 e2 48 c7 c6 6e e0 58 c0 48 0f 44 f0 48 c7 c7 81 e0 58 c0 e8 07 85 cc f9 <0f> 0b 83 2d 06 0b 20 00 01 5b 5d 41 5c 41 5d c3 66 66 2e 0f 1f 84
[  247.740060] RSP: 0018:ffffb58d81dafce8 EFLAGS: 00010082
[  247.740078] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000006
[  247.740091] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffff9b87b4bd7d80
[  247.740106] RBP: ffff9b87b4290f40 R08: 00000039ae670dd0 R09: 0000000000000000
[  247.740119] R10: 0000000000000000 R11: ffff9b87ab428900 R12: 00000000001e0100
[  247.740132] R13: 0000000000000000 R14: ffff9b87b4290f58 R15: ffffffffbb38da17
[  247.740148] FS:  0000000000000000(0000) GS:ffff9b87b4a00000(0000) knlGS:0000000000000000
[  247.740162] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.740175] CR2: 00007fd12f6f988a CR3: 000000003d612000 CR4: 00000000001006f0
[  247.740190] Call Trace:
[  247.740287]  skl_pcode_request+0x66f9/0x74a0 [i915]
[  247.740395]  intel_power_domains_init_hw+0x4ec/0x620 [i915]
[  247.740469]  ? vlv_force_gfx_clock+0x840/0x4430 [i915]
[  247.740550]  intel_power_domains_resume+0x3e/0x60 [i915]
[  247.740615]  vlv_force_gfx_clock+0x7f9/0x4430 [i915]
[  247.740651]  dpm_run_callback+0x66/0x240
[  247.740693]  device_resume_early+0x9d/0x180
[  247.740736]  async_resume_early+0x1c/0x30
[  247.740757]  async_run_entry_fn+0x39/0x160
[  247.740792]  process_one_work+0x247/0x580
[  247.740863]  worker_thread+0x50/0x3b0
[  247.740919]  kthread+0x10a/0x140
[  247.740936]  ? process_one_work+0x580/0x580
[  247.740952]  ? kthread_park+0x90/0x90
[  247.740990]  ret_from_fork+0x3a/0x50
[  247.741085] irq event stamp: 2162
[  247.741104] hardirqs last  enabled at (2161): [<ffffffffbab3bbdb>] _raw_spin_unlock_irqrestore+0x4b/0x60
[  247.741121] hardirqs last disabled at (2162): [<ffffffffbab3c383>] _raw_spin_lock_irqsave+0x23/0x83
[  247.741141] softirqs last  enabled at (2138): [<ffffffffbae0035d>] __do_softirq+0x35d/0x45d
[  247.741159] softirqs last disabled at (2131): [<ffffffffba0f20e4>] irq_exit+0xf4/0x100
[  247.741173] ---[ end trace d10e680a24fba687 ]---
Comment 1 Lakshmi 2019-10-25 07:10:00 UTC 
Can you verify the issue with drmtip? (https://cgit.freedesktop.org/drm-tip) with kernel parameters drm.debug=0x1e log_buf_len=4M. If the problem persists attach the full dmesg from boot.

Is there any other impact other than the warning?
Comment 2 CI Bug Log 2019-10-30 08:12:25 UTC 
The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* BSW: igt@gem_exec_suspend@basic-s0 - dmesg-warn - Unclaimed write to register 0x1e0100
  - https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15009/fi-bsw-n3050/igt@gem_exec_suspend@basic-s0.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7213/fi-bsw-n3050/igt@gem_exec_suspend@basic-s0.html
Comment 3 Lakshmi 2019-10-30 08:14:47 UTC 
(In reply to CI Bug Log from comment #2)
> The CI Bug Log issue associated to this bug has been updated.
> 
> ### New filters associated
> 
> * BSW: igt@gem_exec_suspend@basic-s0 - dmesg-warn - Unclaimed write to
> register 0x1e0100
>   -
> https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15009/fi-bsw-n3050/
> igt@gem_exec_suspend@basic-s0.html
>   -
> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7213/fi-bsw-n3050/
> igt@gem_exec_suspend@basic-s0.html

@Chris, correct me if these failures are not part of this bug.
Comment 4 Hans de Goede 2019-11-12 22:34:51 UTC 
I have tried to reproduce this with drm-tip to gather the requested logs and with "normal" 5.4-rc7 I cannot reproduce it with either atm. It seems that this bug triggering might be timing dependent or some such :|

So sorry, no logs.
Comment 5 Lakshmi 2019-11-15 11:21:41 UTC 
(In reply to Hans de Goede from comment #4)
> I have tried to reproduce this with drm-tip to gather the requested logs and
> with "normal" 5.4-rc7 I cannot reproduce it with either atm. It seems that
> this bug triggering might be timing dependent or some such :|
> 
> So sorry, no logs.

Thanks for verifying the issue with drmtip. I will close this issue as WORKSFORME. Please reopen this issue if it appears again.

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