linux-kernel - [drm/i915/dp] 4a8d79901d: WARNING:at_drivers/gpu/drm/i915/display/intel_display_power.c:#assert_can_disable

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Date:   Thu, 4 Feb 2021 17:02:29 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Lyude Paul <lyude@...hat.com>
Cc:     Jani Nikula <jani.nikula@...el.com>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        lkp@...ts.01.org, lkp@...el.com, rui.zhang@...el.com,
        yu.c.chen@...el.com
Subject: [drm/i915/dp]  4a8d79901d:
 WARNING:at_drivers/gpu/drm/i915/display/intel_display_power.c:#assert_can_disable_lcpll[i915]


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@...el.com>


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


View attachment "config-5.11.0-rc2-00745-g4a8d79901d5b" of type "text/plain" (172412 bytes)

View attachment "job-script" of type "text/plain" (5241 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (46820 bytes)

View attachment "suspend-stress" of type "text/plain" (1173 bytes)

View attachment "job.yaml" of type "text/plain" (4415 bytes)