[Bug 100047] [IGT] [GLK/APL/BSW/IVB/KBL/HSW /BYT] kms_sysfs_edid_timing test assertion failure

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100047

--- Comment #39 from Marta Löfstedt <marta.lofstedt at intel.com> ---
My patchwork didn't pass on KBL-shards:

https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_670/shard-kbl3/igt@kms_sysfs_edid_timing.html

(kms_sysfs_edid_timing:1520) WARNING: card0-DP-1: probe time exceed 10ms,
max=47.69ms, avg=40.72ms
(kms_sysfs_edid_timing:1520) WARNING: card0-HDMI-A-1: probe time exceed 10ms,
max=115.46ms, avg=113.03ms
(kms_sysfs_edid_timing:1520) CRITICAL: Test assertion failure function
__real_main40, file kms_sysfs_edid_timing.c:92:
(kms_sysfs_edid_timing:1520) CRITICAL: Failed assertion: mean.mean <
(THRESHOLD_TOTAL * 1e6)
(kms_sysfs_edid_timing:1520) CRITICAL: card0-HDMI-A-1: average probe time
exceeded 50ms, max=115.46ms, avg=113.03ms
Test kms_sysfs_edid_timing failed.

So, I discussed with Tomi and decided to try to come up with a really obscure
connection chain:
miniDP -> hdmi, connected to hdmi -> DVI, connected to DVI -> DP, connected to
DP port of display:

IGT-Version: 1.20-g103af72 (x86_64) (Linux: 4.15.0-rc3-CI-CI_DRM_3501+ x86_64)
card0-HDMI-A-2: mean.max 3776602,00ns, 3776,60us, 3,78ms, mean.avg
3418194,47ns, 3418,19us, 3,42ms
card0-DP-1: mean.max 78248,00ns, 78,25us, 0,08ms, mean.avg 20597,13ns, 20,60us,
0,02ms
card0-HDMI-A-1: mean.max 875873,00ns, 875,87us, 0,88ms, mean.avg 785897,07ns,
785,90us, 0,79ms
SUCCESS (0,068s)

So, removing DVI -> DP gives:
miniDP -> hdmi, connected to hdmi -> DVI, connected to DVI port of display:

IGT-Version: 1.20-g103af72 (x86_64) (Linux: 4.15.0-rc3-CI-CI_DRM_3501+ x86_64)
card0-HDMI-A-2: mean.max 17301077,00ns, 17301,08us, 17,30ms, mean.avg
16955431,60ns, 16955,43us, 16,96ms
(kms_sysfs_edid_timing:1251) WARNING: card0-HDMI-A-2: probe time exceed 10ms,
max=17,30ms, avg=16,96ms
card0-DP-1: mean.max 114544542,00ns, 114544,54us, 114,54ms, mean.avg
114311060,40ns, 114311,06us, 114,31ms
(kms_sysfs_edid_timing:1251) WARNING: card0-DP-1: probe time exceed 10ms,
max=114,54ms, avg=114,31ms
(kms_sysfs_edid_timing:1251) CRITICAL: Test assertion failure function
__real_main40, file kms_sysfs_edid_timing.c:92:
(kms_sysfs_edid_timing:1251) CRITICAL: Failed assertion: mean.mean <
(THRESHOLD_TOTAL * 1e6)
(kms_sysfs_edid_timing:1251) CRITICAL: card0-DP-1: average probe time exceeded
50ms, max=114,54ms, avg=114,31ms

I will send up a V2 and also include hack to get the test run on BAT

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