[Bug 103337] [CI] igt@* - dmesg-warn - *ERROR* Panel is unable to calculate any CRC after 6 vblanks | Unclaimed read from register 0x130090

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103337

--- Comment #14 from Martin Peres <martin.peres at free.fr> ---
The following has also been seen on
igt at debugfs_test@read_all_entries_display_off, not just
igt at debugfs_test@read_all_entries.

[ 336.785322] ------------[ cut here ]------------
[ 336.785363] Unclaimed read from register 0x130090
[ 336.785431] WARNING: CPU: 3 PID: 1793 at
drivers/gpu/drm/i915/intel_uncore.c:986 __unclaimed_reg_debug+0x3b/0x50 [i915]
[ 336.785435] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic x86_pkg_temp_thermal i915 intel_powerclamp coretemp
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec
snd_hwdep snd_hda_core snd_pcm r8169 mii mei_me prime_numbers mei i2c_hid
pinctrl_geminilake pinctrl_intel
[ 336.785498] CPU: 3 PID: 1793 Comm: debugfs_test Tainted: G U
4.15.0-rc8-CI-CI_DRM_3643+ #1
[ 336.785500] Hardware name: Intel Corp. Geminilake/GLK RVP1 DDR4 (05), BIOS
GELKRVPA.X64.0062.B30.1708222146 08/22/2017
[ 336.785537] RIP: 0010:__unclaimed_reg_debug+0x3b/0x50 [i915]
[ 336.785540] RSP: 0018:ffffc9000194bd38 EFLAGS: 00010092
[ 336.785544] RAX: 0000000000000025 RBX: 0000000000000000 RCX: 0000000000000002
[ 336.785547] RDX: 0000000080000002 RSI: ffffffff820abd07 RDI: 00000000ffffffff
[ 336.785549] RBP: 0000000000130090 R08: 0000000000000000 R09: 0000000000000001
[ 336.785551] R10: ffffc9000194bcd0 R11: 0000000000000002 R12: 0000000000000001
[ 336.785554] R13: ffff880168650ca0 R14: 0000000000000000 R15: 0000000000000202
[ 336.785557] FS: 00007fc0bd595a40(0000) GS:ffff88017fd80000(0000)
knlGS:0000000000000000
[ 336.785559] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 336.785562] CR2: 00007f110a6e4030 CR3: 000000017814a000 CR4: 0000000000340ee0
[ 336.785564] Call Trace:
[ 336.785604] fwtable_read32+0x214/0x290 [i915]
[ 336.785640] i915_drpc_info+0x267/0x8c0 [i915]
[ 336.785646] ? rcu_read_lock_sched_held+0x6f/0x80
[ 336.785654] seq_read+0xd8/0x3a0
[ 336.785660] ? debug_check_no_obj_freed+0x11f/0x230
[ 336.785667] full_proxy_read+0x4b/0x70
[ 336.785673] __vfs_read+0x1e/0x120
[ 336.785678] ? do_sys_open+0x197/0x1f0
[ 336.785683] ? do_sys_open+0x197/0x1f0
[ 336.785688] ? entry_SYSCALL_64_fastpath+0x5/0x8f
[ 336.785693] vfs_read+0x9e/0x150
[ 336.785698] SyS_read+0x40/0xa0
[ 336.785705] entry_SYSCALL_64_fastpath+0x22/0x8f
[ 336.785708] RIP: 0033:0x7fc0bba6d6d0
[ 336.785710] RSP: 002b:00007ffdd2380998 EFLAGS: 00000246
[ 336.785723] Code: 3c 01 75 30 84 db 75 2c 45 84 e4 48 c7 c0 98 05 26 a0 48 c7
c6 8e 05 26 a0 48 0f 44 f0 89 ea 48 c7 c7 a1 05 26 a0 e8 55 c3 ed e0 <0f> ff 83
2d 6c b8 16 00 01 5b 5d 41 5c c3 0f 1f 80 00 00 00 00 
[ 336.785854] ---[ end trace f74a4c54edc3891e ]---

Source:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3643/shard-glkb3/igt@debugfs_test@read_all_entries_display_off.html

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