fi-tgl-dsi: Unclaimed read from register 0x6b420
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9682/fi-tgl-dsi/boot0.txt
<4>[ 44.956068] i915 0000:00:02.0: Unclaimed read from register 0x6b420
<4>[ 44.956211] WARNING: CPU: 4 PID: 273 at drivers/gpu/drm/i915/intel_uncore.c:1255 __unclaimed_reg_debug+0x69/0x80 [i915]
<4>[ 44.957075] Modules linked in: i915(+) mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_intel_dspcfg snd_hda_codec snd_hwdep cdc_ether snd_hda_core usbnet mii e1000e snd_pcm ptp mei_me pps_core mei intel_lpss_pci(+) prime_numbers
<4>[ 44.957509] CPU: 4 PID: 273 Comm: systemd-udevd Tainted: G U 5.11.0-rc5-CI-CI_DRM_9683+ #1
<4>[ 44.957538] Hardware name: Intel Corporation Tiger Lake Client Platform/TigerLake Y LPDDR4x T4 Crb, BIOS TGLSFWI1.R00.2527.A03.2001170231 01/17/2020
<4>[ 44.957560] RIP: 0010:__unclaimed_reg_debug+0x69/0x80 [i915]
<4>[ 44.958399] Code: 48 8b 78 08 4c 8b 67 50 4d 85 e4 74 2c e8 df 61 4f e1 45 89 e8 48 89 e9 4c 89 e2 48 89 c6 48 c7 c7 e0 a9 49 a0 e8 50 17 84 e1 <0f> 0b 48 8b 43 08 83 a8 88 0d 00 00 01 eb a7 4c 8b 27 eb cf 0f 1f
<4>[ 44.958447] RSP: 0018:ffffc900004fb708 EFLAGS: 00010086
<4>[ 44.958520] RAX: 0000000000000000 RBX: ffff888117560ef8 RCX: 0000000000000003
<4>[ 44.958559] RDX: 0000000080000003 RSI: ffffffff8235a317 RDI: 00000000ffffffff
<4>[ 44.958600] RBP: ffffffffa04e6b50 R08: ffff88810a3dca68 R09: 00000000fffffffe
<4>[ 44.958636] R10: 0000000093aadb60 R11: 0000000021d605c3 R12: ffff888102d4a8b0
<4>[ 44.958672] R13: 000000000006b420 R14: 0000000000000206 R15: 0000000000000000
<4>[ 44.958718] FS: 00007f6aead46680(0000) GS:ffff8883a3c00000(0000) knlGS:0000000000000000
<4>[ 44.958771] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 44.958810] CR2: 0000563c00515470 CR3: 0000000109666006 CR4: 0000000000770ee0
<4>[ 44.958849] PKRU: 55555554
<4>[ 44.958883] Call Trace:
<4>[ 44.958963] gen12_fwtable_read32+0x24b/0x2f0 [i915]
<4>[ 44.960249] intel_vrr_get_config+0x4c/0x130 [i915]
<4>[ 44.961796] hsw_get_pipe_config+0x460/0x13f0 [i915]
<4>[ 44.963297] ? __lock_acquire+0x5dc/0x25a0
<4>[ 44.963857] intel_crtc_get_pipe_config+0x1d/0x40 [i915]
<4>[ 44.965108] ? intel_crtc_state_reset+0x3b/0x70 [i915]
<4>[ 44.966052] intel_modeset_setup_hw_state+0x1a9/0x19f0 [i915]
<4>[ 44.966982] ? ww_mutex_lock+0x39/0xa0
<4>[ 44.967106] intel_modeset_init_nogem+0x37a/0x1390 [i915]
<4>[ 44.967998] ? _raw_spin_unlock_irqrestore+0x2f/0x50
<4>[ 44.968038] ? gen12_fwtable_read32+0x8f/0x2f0 [i915]
<4>[ 44.968861] i915_driver_probe+0x7bd/0xd90 [i915]
<4>[ 44.969606] ? __pm_runtime_resume+0x4f/0x80
<4>[ 44.969702] i915_pci_probe+0x43/0x1d0 [i915]
<4>[ 44.970388] ? _raw_spin_unlock_irqrestore+0x2f/0x50
<4>[ 44.970453] pci_device_probe+0x9e/0x110
<4>[ 44.970513] really_probe+0xea/0x410
<4>[ 44.970568] driver_probe_device+0xd9/0x140
<4>[ 44.970610] device_driver_attach+0x4a/0x50
<4>[ 44.970655] __driver_attach+0x83/0x140
<4>[ 44.970696] ? device_driver_attach+0x50/0x50
<4>[ 44.970752] ? device_driver_attach+0x50/0x50
<4>[ 44.970784] bus_for_each_dev+0x75/0xc0
<4>[ 44.970841] bus_add_driver+0x14b/0x1f0
<4>[ 44.970888] driver_register+0x66/0xb0
<4>[ 44.970926] i915_init+0x70/0x87 [i915]
<4>[ 44.971654] ? 0xffffffffa09a3000
<4>[ 44.971694] do_one_initcall+0x56/0x2e0
<4>[ 44.971740] ? kmem_cache_alloc_trace+0x367/0x420
<4>[ 44.971816] do_init_module+0x55/0x200
<4>[ 44.971862] load_module+0x27a7/0x2a50
<4>[ 44.972115] ? __do_sys_finit_module+0xad/0x110
<4>[ 44.972140] __do_sys_finit_module+0xad/0x110
<4>[ 44.972284] do_syscall_64+0x33/0x80
<4>[ 44.972320] entry_SYSCALL_64_after_hwframe+0x44/0xa9
<4>[ 44.972351] RIP: 0033:0x7f6aea865839
<4>[ 44.972378] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4>[ 44.972404] RSP: 002b:00007fff04598e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4>[ 44.972450] RAX: ffffffffffffffda RBX: 0000563c0051afc0 RCX: 00007f6aea865839
<4>[ 44.972472] RDX: 0000000000000000 RSI: 0000563c004ff140 RDI: 000000000000000f
<4>[ 44.972492] RBP: 0000563c004ff140 R08: 0000000000000000 R09: 00007fff04598f70
<4>[ 44.972513] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
<4>[ 44.972533] R13: 0000563c005081c0 R14: 0000000000020000 R15: 0000000000000000
<4>[ 44.972674] irq event stamp: 843732
<4>[ 44.972707] hardirqs last enabled at (843731): [<ffffffff81a9e352>] _raw_spin_unlock_irqrestore+0x42/0x50
<4>[ 44.972745] hardirqs last disabled at (843732): [<ffffffff81a9e127>] _raw_spin_lock_irqsave+0x47/0x50
<4>[ 44.972773] softirqs last enabled at (843718): [<ffffffff81e00342>] __do_softirq+0x342/0x48e
<4>[ 44.972803] softirqs last disabled at (843713): [<ffffffff81c00f4f>] asm_call_irq_on_stack+0xf/0x20
<4>[ 44.972835] ---[ end trace 543c4d7f29f1ee17 ]---