[Bug 112120] New: [CHT] Unclaimed write to register 0x1e0100

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112120

            Bug ID: 112120
           Summary: [CHT] Unclaimed write to register 0x1e0100
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jwrdegoede at fedoraproject.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

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 ]---

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