igt@kms_dp_aux_dev - fail - *ERROR* AUX B/port B: did not complete or timeout within 10ms
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8260/shard-iclb7/igt@kms_dp_aux_dev.html
<3> [54.330309] i915 0000:00:02.0: [drm] *ERROR* AUX B/port B: did not complete or timeout within 10ms (status 0xad4003ff)
<3> [54.330402] i915 0000:00:02.0: [drm] *ERROR* AUX B/port B: not done (status 0xad4003ff)
<4> [54.342307] ------------[ cut here ]------------
<4> [54.342313] i915 0000:00:02.0: AUX B/port B: not started (status 0xad4003ff)
<4> [54.342396] WARNING: CPU: 1 PID: 1173 at drivers/gpu/drm/i915/display/intel_dp.c:1408 intel_dp_aux_xfer+0x1f3/0x9c0 [i915]
<4> [54.342399] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul snd_hda_intel snd_intel_dspcfg snd_hda_codec cdc_ether ghash_clmulni_intel usbnet mii snd_hwdep e1000e snd_hda_core snd_pcm ptp pps_core mei_me mei intel_lpss_pci prime_numbers
<4> [54.342418] CPU: 1 PID: 1173 Comm: kms_dp_aux_dev Tainted: G U 5.6.0-CI-CI_DRM_8260+ #1
<4> [54.342420] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP, BIOS ICLSFWR1.R00.3234.A01.1906141750 06/14/2019
<4> [54.342475] RIP: 0010:intel_dp_aux_xfer+0x1f3/0x9c0 [i915]
<4> [54.342479] Code: 48 8b 5f 50 48 85 db 0f 84 ac 05 00 00 e8 15 95 fe e0 41 89 e8 4c 89 e1 48 89 da 48 89 c6 48 c7 c7 60 39 7b a0 e8 ad 30 9c e0 <0f> 0b bb f0 ff ff ff 41 89 ae 30 0a 00 00 48 8b 7c 24 40 be ff ff
<4> [54.342481] RSP: 0018:ffffc9000049fc18 EFLAGS: 00010286
<4> [54.342483] RAX: 0000000000000000 RBX: ffff88849baa2180 RCX: 0000000000000001
<4> [54.342485] RDX: 0000000080000001 RSI: ffff88849d1dc8f8 RDI: 00000000ffffffff
<4> [54.342487] RBP: 00000000ad4003ff R08: ffff88849d1dc8f8 R09: 0000000000000000
<4> [54.342489] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8884828992c0
<4> [54.342490] R13: 0000000000000004 R14: ffff88847ed9a128 R15: ffff88847a100000
<4> [54.342493] FS: 00007f57fc614300(0000) GS:ffff88849fe80000(0000) knlGS:0000000000000000
<4> [54.342495] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [54.342497] CR2: 00007fec50e47000 CR3: 000000049d23a004 CR4: 0000000000760ee0
<4> [54.342498] PKRU: 55555554
<4> [54.342500] Call Trace:
<4> [54.342509] ? mark_held_locks+0x49/0x70
<4> [54.342564] intel_dp_aux_transfer+0xa7/0x200 [i915]
<4> [54.342569] ? usleep_range+0x40/0x90
<4> [54.342572] ? usleep_range+0x65/0x90
<4> [54.342577] drm_dp_dpcd_access+0x76/0x110
<4> [54.342584] drm_dp_dpcd_read+0xb1/0xf0
<4> [54.342590] auxdev_read_iter+0xf7/0x1b0
<4> [54.342597] new_sync_read+0x10f/0x1a0
<4> [54.342606] vfs_read+0x96/0x160
<4> [54.342611] ksys_read+0x9f/0xe0
<4> [54.342617] do_syscall_64+0x4f/0x220
<4> [54.342621] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [54.342623] RIP: 0033:0x7f57fbb6d34e
<4> [54.342626] Code: 00 00 00 00 48 8b 15 71 8c 20 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 0f 1f 40 00 8b 05 ba d0 20 00 85 c0 75 16 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5a f3 c3 0f 1f 84 00 00 00 00 00 41 54 55 49
<4> [54.342628] RSP: 002b:00007ffcc9ce2248 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
<4> [54.342631] RAX: ffffffffffffffda RBX: 0000563e91b12d00 RCX: 00007f57fbb6d34e
<4> [54.342633] RDX: 0000000000000010 RSI: 00007ffcc9ce2250 RDI: 0000000000000007
<4> [54.342634] RBP: 0000000000000008 R08: 0000563e91b12deb R09: 000000000000000b
<4> [54.342636] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007
<4> [54.342638] R13: 00007ffcc9ce2260 R14: 0000563e91b11800 R15: 0000000000000000
<4> [54.342648] irq event stamp: 43382
<4> [54.342651] hardirqs last enabled at (43381): [<ffffffff8112f64a>] console_unlock+0x4ba/0x5a0
<4> [54.342654] hardirqs last disabled at (43382): [<ffffffff81001d50>] trace_hardirqs_off_thunk+0x1a/0x1c
<4> [54.342657] softirqs last enabled at (42424): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
<4> [54.342660] softirqs last disabled at (42413): [<ffffffff810baa2a>] irq_exit+0xba/0xc0
<4> [54.342662] ---[ end trace fca2753cd86d851d ]---