Re: [drm/i915/dp] 4a8d79901d: WARNING:at_drivers/gpu/drm/i915/display/intel_display_power.c:#assert_can_disable_lcpll[i915]

[Oliver Sang]

Hi Lyude, sorry for later.

before we send out the report, we also tested fe7d52bccab6, the issue still exists on it.
attached one kmsg-fe7d52bccab6.xz FYI.

we also tested on latest v5.12-rc3, also exists.
attached kmsg-v5.12-rc3.xz FYI.



On Fri, Feb 05, 2021 at 02:53:11PM -0500, Lyude Paul wrote:
> Am I right in assuming this is likely a very delayed test result from before:
> 
> fe7d52bccab6 ("drm/i915/dp: Don't use DPCD backlights that need PWM
> enable/disable")
> 
> Made it into the kernel? I see that there's a PWM being left on, which was the
> same issue we were seeing on fi-bdw-samus
> 
> On Thu, 2021-02-04 at 17:02 +0800, kernel test robot wrote:
> > 
> > Greeting,
> > 
> > FYI, we noticed the following commit (built with gcc-9):
> > 
> > commit: 4a8d79901d5bed0812d272c372aa40282937b50f ("drm/i915/dp: Enable Intel's
> > HDR backlight interface (only SDR for now)")
> > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> > 
> > 
> > in testcase: suspend-stress
> > version: 
> > with following parameters:
> > 
> >         mode: freeze
> >         iterations: 10
> > 
> > 
> > 
> > on test machine: 4 threads Broadwell-Y with 8G memory
> > 
> > caused below changes (please refer to attached dmesg/kmsg for entire
> > log/backtrace):
> > 
> > 
> > 
> > If you fix the issue, kindly add following tag
> > Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> > 
> > 
> > kern  :warn  : [   21.137894] ------------[ cut here ]------------
> > kern  :warn  : [   21.137897] CPU PWM1 enabled
> > kern  :warn  : [   21.137930] WARNING: CPU: 3 PID: 575 at
> > drivers/gpu/drm/i915/display/intel_display_power.c:4902
> > assert_can_disable_lcpll+0x335/0x3c0 [i915]
> > kern  :warn  : [   21.138084] Modules linked in: sd_mod t10_pi sg
> > x86_pkg_temp_thermal intel_powerclamp i915 hid_rmi rmi_core hid_multitouch
> > coretemp intel_ra
> > pl_msr crct10dif_pclmul wmi_bmof crc32_pclmul intel_gtt crc32c_intel
> > ghash_clmulni_intel rapl drm_kms_helper intel_cstate ahci libahci serio_raw
> > mei_me proces
> > sor_thermal_device intel_uncore processor_thermal_rfim syscopyarea sysfillrect
> > intel_soc_dts_iosf sysimgblt intel_pch_thermal hid_sensor_custom fb_sys_fops
> > li
> > bata bcma processor_thermal_mbox joydev mei drm processor_thermal_rapl
> > intel_rapl_common int340x_thermal_zone i2c_hid ideapad_laptop sparse_keymap
> > wmi rfkill
> > video int3400_thermal acpi_thermal_rel i2c_designware_platform dw_dmac
> > i2c_designware_core acpi_pad ip_tables
> > kern  :warn  : [   21.138148] CPU: 3 PID: 575 Comm: kworker/u8:6 Tainted:
> > G        W I       5.11.0-rc2-00745-g4a8d79901d5b #1
> > kern  :warn  : [   21.138153] Hardware name: LENOVO 80HE/VIUU4, BIOS A6CN38WW
> > 09/30/2014
> > kern  :warn  : [   21.138155] Workqueue: events_unbound async_run_entry_fn
> > kern  :warn  : [   21.138161] RIP: 0010:assert_can_disable_lcpll+0x335/0x3c0
> > [i915]
> > kern  :info  : [   21.138263] ahci 0000:00:1f.2: pci_pm_suspend_late+0x0/0x40
> > returned 0 after 0 usecs
> > kern  :warn  : [   21.138296] Code: c0 75 22 e8 8d 61 cb ff e9 f3 fd ff ff e8
> > fd bc 6a c1 0f 0b e9 0c fd ff ff e8 f1 bc 6a c1 0f 0b e9 05 fe ff ff e8 e5 bc
> > 6a c1 <0f> 0b e9 cf fd ff ff e8 d9 bc 6a c1 0f 0b e9 a2 fd ff ff e8 cd bc
> > kern  :warn  : [   21.138300] RSP: 0018:ffffc900006f3d58 EFLAGS: 00010282
> > kern  :warn  : [   21.138304] RAX: 0000000000000000 RBX: ffff8881451002e8 RCX:
> > 0000000000000027
> > kern  :warn  : [   21.138307] RDX: 0000000000000027 RSI: 0000000000000002 RDI:
> > ffff888249397cf8
> > kern  :warn  : [   21.138310] RBP: ffff888145100000 R08: ffff888249397cf0 R09:
> > ffffc900006f3cf0
> > kern  :warn  : [   21.138313] R10: 0000000000000001 R11: 3030302035313969 R12:
> > ffff8881451007f0
> > kern  :warn  : [   21.138316] R13: ffff888145106c60 R14: 0000000000000002 R15:
> > 0000000000000000
> > kern  :warn  : [   21.138319] FS:  0000000000000000(0000)
> > GS:ffff888249380000(0000) knlGS:0000000000000000
> > kern  :warn  : [   21.138322] CS:  0010 DS: 0000 ES: 0000 CR0:
> > 0000000080050033
> > kern  :warn  : [   21.138325] CR2: 0000557c22ec68a0 CR3: 0000000004c0a003 CR4:
> > 00000000003706e0
> > kern  :warn  : [   21.138329] Call Trace:
> > kern  :warn  : [   21.138334]  hsw_disable_lcpll+0x22/0x280 [i915]
> > kern  :warn  : [   21.138479]  i915_drm_suspend_late+0x5e/0x100 [i915]
> > kern  :warn  : [   21.138578]  ? pci_pm_poweroff_late+0x40/0x40
> > kern  :warn  : [   21.138582]  dpm_run_callback+0x4c/0x140
> > kern  :warn  : [   21.138590]  __device_suspend_late+0x98/0x1a0
> > kern  :warn  : [   21.138596]  async_suspend_late+0x1b/0xa0
> > kern  :warn  : [   21.138602]  async_run_entry_fn+0x39/0x160
> > kern  :warn  : [   21.138608]  process_one_work+0x1ed/0x3c0
> > kern  :warn  : [   21.138612]  worker_thread+0x50/0x3c0
> > kern  :warn  : [   21.138617]  ? process_one_work+0x3c0/0x3c0
> > kern  :warn  : [   21.138620]  kthread+0x116/0x160
> > kern  :warn  : [   21.138626]  ? kthread_park+0xa0/0xa0
> > kern  :warn  : [   21.138631]  ret_from_fork+0x22/0x30
> > kern  :warn  : [   21.138640] ---[ end trace a93fe4d40a5a37bb ]---
> > 
> > 
> > 
> > To reproduce:
> > 
> >         git clone https://github.com/intel/lkp-tests.git
> >         cd lkp-tests
> >         bin/lkp install job.yaml  # job file is attached in this email
> >         bin/lkp run     job.yaml
> > 
> > 
> > 
> > Thanks,
> > Oliver Sang
> > 
> 
> -- 
> Sincerely,
>    Lyude Paul (she/her)
>    Software Engineer at Red Hat
>    
> Note: I deal with a lot of emails and have a lot of bugs on my plate. If you've
> asked me a question, are waiting for a review/merge on a patch, etc. and I
> haven't responded in a while, please feel free to send me another email to check
> on my status. I don't bite!
>

Attachment: kmsg-fe7d52bccab6.xz
Description: application/xz

Attachment: kmsg-v5.12-rc3.xz
Description: application/xz