igt@testdisplay - timeout - *ERROR* [CRTC:\d+:pipe [ABC]] mismatch in linetime.*

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_429/fi-cfl-8700k/igt@testdisplay.html#dmesg-warnings1469

<3> [28.705487] i915 0000:00:02.0: [drm] *ERROR* [CRTC:51:pipe A] mismatch in linetime (expected 512, found 0)
<4> [28.705514] ------------[ cut here ]------------
<4> [28.705515] pipe state doesn't match!
<4> [28.705557] WARNING: CPU: 7 PID: 1135 at drivers/gpu/drm/i915/display/intel_display.c:14317 intel_atomic_commit_tail+0x116a/0x13e0 [i915]
<4> [28.705558] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 mei_hdcp x86_pkg_temp_thermal coretemp snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core crct10dif_pclmul crc32_pclmul e1000e ghash_clmulni_intel snd_pcm mei_me mei ptp prime_numbers pps_core
<4> [28.705567] CPU: 7 PID: 1135 Comm: testdisplay Tainted: G     U            5.5.0-g0f01f8fc834a-drmtip_429+ #1
<4> [28.705569] Hardware name: Micro-Star International Co., Ltd. MS-7B54/Z370M MORTAR (MS-7B54), BIOS 1.00 10/31/2017
<4> [28.705629] RIP: 0010:intel_atomic_commit_tail+0x116a/0x13e0 [i915]
<4> [28.705630] Code: f7 c3 e9 1c f3 ff ff e8 14 ab 98 c3 0f 0b e9 ec f6 ff ff f6 86 63 0c 00 00 10 0f 84 60 f5 ff ff e9 12 f9 ff ff e8 f6 aa 98 c3 <0f> 0b e9 4f f7 ff ff e8 ea aa 98 c3 0f 0b 0f b6 14 24 44 0f b6 44
<4> [28.705632] RSP: 0018:ffff9ebe01323a98 EFLAGS: 00010282
<4> [28.705633] RAX: 0000000000000000 RBX: ffff9d1294a40800 RCX: 0000000000000001
<4> [28.705647] RDX: 0000000080000001 RSI: ffff9d12a13531e0 RDI: 00000000ffffffff
<4> [28.705648] RBP: ffff9d1292fac000 R08: ffff9d12a13531e0 R09: 0000000000000000
<4> [28.705649] R10: ffff9ebe01323a40 R11: 0000000000000000 R12: ffff9d1292a29000
<4> [28.705650] R13: ffff9d128f150758 R14: ffff9d128f150000 R15: ffff9d128f150750
<4> [28.705652] FS:  00007f095a56be40(0000) GS:ffff9d12a6b80000(0000) knlGS:0000000000000000
<4> [28.705653] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [28.705654] CR2: 0000561ef77e4000 CR3: 000000025af8c004 CR4: 00000000003606e0
<4> [28.705655] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4> [28.705656] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4> [28.705657] Call Trace:
<4> [28.705695]  intel_atomic_commit+0x312/0x390 [i915]
<4> [28.705700]  drm_atomic_helper_set_config+0x57/0xa0
<4> [28.705702]  drm_mode_setcrtc+0x1be/0x710
<4> [28.705713]  ? drm_mode_getcrtc+0x180/0x180
<4> [28.705715]  drm_ioctl_kernel+0xad/0xf0
<4> [28.705718]  drm_ioctl+0x2e1/0x390
<4> [28.705721]  ? drm_mode_getcrtc+0x180/0x180
<4> [28.705729]  do_vfs_ioctl+0x9c/0x730
<4> [28.705733]  ksys_ioctl+0x35/0x60
<4> [28.705736]  __x64_sys_ioctl+0x11/0x20
<4> [28.705738]  do_syscall_64+0x4f/0x240
<4> [28.705741]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [28.705742] RIP: 0033:0x7f0958f845d7