[Bug 102505] [BAT] igt at kms_chamelium@common-hpd-after-suspend caused *ERROR* failed to enable link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102505

--- Comment #14 from Mun, Gwan-gyeong <elongbug at gmail.com> ---
[code flow of IGT common-hpd-after-suspend]

igt-gpu-tools_FDO/tests/kms_chamelium.c
  common-hpd-after-suspend: test_suspend_resume_hpd_common(...,
SUSPEND_STATE_MEM, SUSPEND_TEST_NONE);

  1) make all of ports disconnect: reset_state(data, NULL); 
  2) /* Make sure we notice new connectors after resuming */
     try_suspend_resume_hpd(data, NULL, state, test, mon, false);

  3) /* Now make sure we notice disconnected connectors after resuming */
     try_suspend_resume_hpd(data, NULL, state, test, mon, true);


[Connector State]
 1) Make an initial state with Disconnected
    DP: Disconnected
    HDMI: Disconnected

 2) Suspend
    Resume
      [scheduled chamelium connector enable: igt_get_autoresume_delay(state) *
1000 / 2:  15 x 1000 / 2 => 7500ms
      After 7500ms
      DP  : Connected
      HDMI: Connected

    If "Hotplug event" will not come after resuming of PM or if the connector
state is not "connected" then IGT will complain "Fail".

 3) Suspend
    Resume
      [scheduled chamelium connector disable: igt_get_autoresume_delay(state) *
1000 / 2:  15 x 1000 / 2 => 7500ms
      After 7500ms
      DP  : Disconnected
      HDMI: Disconnected

    If "Hotplug event" will not come after resuming of PM or if the connector
state is not "disconnected" then IGT will complain "Fail".


-------------------------------------------------------------------------------
[Below shows [IGT or PM or Link Training or ERROR] searched dmesg.]

6> [96.975976] [IGT] kms_chamelium: executing
<6> [97.139345] [IGT] kms_chamelium: starting subtest common-hpd-after-suspend

<6> [98.162805] PM: suspend entry (s2idle)

<7> [109.379231] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:196:DP-1]
Link Training Passed at Link Rate = 162000, Lane count = 4     

<6> [110.511525] PM: suspend exit

<6> [110.702260] PM: suspend entry (s2idle)
   While PM mode is going to handle suspend state, i915 received hpd irq ( dp
connector is disconnected )
   Even PM is on handling of suspend mode, i915 is tried to handle hpd event.

<3> [125.489579] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to
enable link training
<7> [125.489625] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:196:DP-1]
Link Training failed at link rate = 162000, lane count = 4

<6> [127.281947] PM: suspend exit
<6> [127.292540] [IGT] kms_chamelium: exiting, ret=0 
<7> [128.294484] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:196:DP-1]
Link Training Passed at Link Rate = 162000, Lane count = 4

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20190424/ba9e696c/attachment.html>