Backtrace

WARNING: CPU: 2 PID: 19856 at drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:2546 dc_link_set_backlight_level+0x8a/0xf0 [amdgpu]
Modules linked in: snd_usb_audio snd_usbmidi_lib snd_rawmidi rfcomm ccm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp tun bridge stp nf_conntrack_netbios_ns llc nf_conntrack_broadcast xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter cmac bnep sunrpc vfat fat btusb btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc edac_mce_amd videobuf2_memops rtw88_8822be rtw88_8822b videobuf2_v4l2 ecdh_generic ecc kvm_amd videobuf2_common rtw88_pci rtw88_core kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi mac80211 snd_hda_intel snd_intel_dspcfg snd_hda_codec irqbypass rapl snd_hda_core snd_hwdep snd_seq joydev pcspkr snd_seq_device sp5100_tco
 wmi_bmof k10temp i2c_piix4 snd_pcm cfg80211 thinkpad_acpi snd_timer ledtrig_audio ipmi_devintf ipmi_msghandler snd mmc_block ucsi_acpi soundcore libarc4 rfkill typec_ucsi typec i2c_scmi acpi_cpufreq binfmt_misc v4l2loopback(O) ip_tables dm_crypt amdgpu iommu_v2 gpu_sched i2c_algo_bit ttm drm_kms_helper cec drm ccp rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel serio_raw nvme rtsx_pci r8169 nvme_core wmi video videodev mc fuse i2c_dev
CPU: 2 PID: 19856 Comm: systemd-sleep Tainted: G           O      5.8.18-100.fc31.x86_64 #1
Hardware name: LENOVO 20MU000CGE/20MU000CGE, BIOS R0WET63W (1.31 ) 03/26/2020
RIP: 0010:dc_link_set_backlight_level+0x8a/0xf0 [amdgpu]
Code: 30 03 00 00 31 c0 48 8d 96 c0 01 00 00 48 8b 0a 48 85 c9 74 06 48 3b 59 08 74 20 83 c0 01 48 81 c2 c8 04 00 00 83 f8 06 75 e3 <0f> 0b 45 31 e4 5b 44 89 e0 5d 41 5c 41 5d 41 5e c3 48 98 48 69 c0
RSP: 0018:ffffb74443d57cb8 EFLAGS: 00010246
RAX: 0000000000000006 RBX: ffff898abc213400 RCX: 0000000000000000
RDX: ffff898a93c81e70 RSI: ffff898a93c80000 RDI: 0000000000000004
RBP: ffff898ab5fe0000 R08: 0000000000000000 R09: ffff898abd2bcd10
R10: ffff898ac61a0090 R11: ffff898ac7eea370 R12: 0000000000006201
R13: 0000000000000000 R14: 0000000000006241 R15: 0000000000000002
FS:  00007f49d2646940(0000) GS:ffff898ac7e80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055592d6c8fc8 CR3: 000000011281e000 CR4: 00000000003406e0
Call Trace:
 amdgpu_dm_backlight_update_status+0xb1/0xc0 [amdgpu]
 backlight_suspend+0x6a/0x80
 ? backlight_resume+0x80/0x80
 dpm_run_callback+0x4f/0x140
 __device_suspend+0x11c/0x4a0
 dpm_suspend+0x117/0x250
 dpm_suspend_start+0x77/0x80
 suspend_devices_and_enter+0xe6/0x7d0
 pm_suspend.cold+0x333/0x386
 state_store+0x71/0xd0
 kernfs_fop_write+0xce/0x1b0
 vfs_write+0xc7/0x1f0
 ksys_write+0x4f/0xc0
 do_syscall_64+0x4d/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f49d35d44a7
Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007fff506fff68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f49d35d44a7
RDX: 0000000000000004 RSI: 00007fff50700050 RDI: 0000000000000004
RBP: 00007fff50700050 R08: 0000000000000000 R09: 000055592d6c0ee0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 000055592d6be2f0 R14: 0000000000000004 R15: 00007f49d36a5700