Backtrace

WARNING: CPU: 2 PID: 39231 at drivers/gpu/drm/i915/display/intel_display_power.c:4891 hsw_enable_pc8+0x61e/0x640 [i915]
Modules linked in: ipheth tun uinput rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter bnep vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) sunrpc nls_utf8 hfsplus wl(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio x86_pkg_temp_thermal snd_hda_intel btusb intel_powerclamp coretemp btrtl btbcm snd_intel_dspcfg btintel kvm_intel snd_intel_sdw_acpi bluetooth snd_hda_codec kvm cfg80211 iTCO_wdt snd_hda_core snd_hwdep mei_hdcp at24
 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc apple_mfi_fastcharge thunderbolt snd_seq snd_seq_device snd_pcm acpi_als intel_pmc_bxt snd_timer applesmc rfkill snd i2c_i801 industrialio_triggered_buffer irqbypass mei_me iTCO_vendor_support rapl intel_cstate intel_uncore kfifo_buf soundcore industrialio mei i2c_smbus pcspkr apple_bl lpc_ich zram ip_tables i915 crct10dif_pclmul crc32_pclmul crc32c_intel i2c_algo_bit drm_kms_helper ghash_clmulni_intel sdhci_pci cec cqhci drm sdhci tg3 mmc_core video fuse
CPU: 2 PID: 39231 Comm: kworker/u8:14 Tainted: P           OE     5.13.4-200.fc34.x86_64 #1
Hardware name: Apple Inc. iMac14,1/Mac-031B6874CF7F642A, BIOS 431.0.0.0.0 02/22/2021
Workqueue: events_unbound async_run_entry_fn
RIP: 0010:hsw_enable_pc8+0x61e/0x640 [i915]
Code: ff e8 40 8b 7f f8 0f 0b e9 14 fc ff ff e8 34 8b 7f f8 0f 0b e9 f8 fb ff ff e8 28 8b 7f f8 0f 0b e9 cb fb ff ff e8 1c 8b 7f f8 <0f> 0b e9 9e fb ff ff e8 10 8b 7f f8 0f 0b e9 71 fb ff ff 66 66 2e
RSP: 0018:ffffb5d000f47d90 EFLAGS: 00010286
RAX: 0000000000000010 RBX: ffff9f7389dc02e8 RCX: 0000000000000027
RDX: ffff9f74e7318a08 RSI: 0000000000000001 RDI: ffff9f74e7318a00
RBP: ffff9f7389dc0000 R08: ffffffffb9c66880 R09: ffffb5d000f47d30
R10: 0000000000000001 R11: ffffffffffffffff R12: ffff9f7389dc07f0
R13: ffff9f7389dc02f8 R14: 0000000000000002 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff9f74e7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c0c7970636 CR3: 0000000028c10005 CR4: 00000000001706e0
Call Trace:
 i915_drm_suspend_late+0x62/0x100 [i915]
 ? pci_pm_poweroff_late+0x30/0x30
 dpm_run_callback+0x4c/0x120
 __device_suspend_late+0xbb/0x250
 async_suspend_late+0x1b/0x90
 async_run_entry_fn+0x30/0x130
 process_one_work+0x1ec/0x380
 worker_thread+0x53/0x3e0
 ? process_one_work+0x380/0x380
 kthread+0x127/0x150
 ? set_kthread_struct+0x40/0x40
 ret_from_fork+0x22/0x30