[Bug 91904] New: [SKL][Linux]: S3 exit failed to bring up the eDP/DP/HDMI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91904

            Bug ID: 91904
           Summary: [SKL][Linux]: S3 exit failed to bring up the
                    eDP/DP/HDMI
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: vijayakannanx.ayyathurai at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

System Environment
================
Board  : SKL-Y A0 LPDDR3 RVP3 CRB FAB2 BOM SKU#1-1 H35311-203
CPU    : SKL ULX D1 GT2 (QDF: QJK6)
BIOS   : v94.3, v89.1, v93.2 
Kernel : Eywa 4.2-rc8 (ec85242d09e7453ae47dac839d8768ecd70e6567)
Mesa   : (HEAD, origin/10.6) 99793e2541510fe208d29e69fedf97a6fff006f8 
Vaapi  : 0.38
xf86-video-intel  :(HEAD, origin/master, origin/HEAD, master)
9b0ed16385ae076c262a2e09639822d9488ccf57 
Libva    : (HEAD, origin/master, origin/HEAD, master)
fdd6ee00c916f530e4d0aa1b250633643999dcf1 
Intel i965:    (HEAD, origin/master, origin/HEAD, master)
7c47a8f74878904e0d2fbb5da966552f783d74ab 
Cairo   :(HEAD, tag: 1.14.2) 93422b3cb5e0ef8104b8194c8873124ce2f5ea2d 
Libdrm  :(HEAD, origin/master, origin/HEAD, master)
2a34176123b1dbf55d129248a431afb185e6a37c

Regression?
==========
Yes. This issue didnt come with Eywa 4.2-rc3.

Bug detailed description
===================
During S3 exit eDP/DP/HDMI is failing to switch-ON. But able to login remotely
through tty shell. Issue is same with both I915 disabled and I915 enabled.

Reproduce Steps
==============
1. Boot the RVP-3 with mentioned config.
2. Enter "echo mem > /sys/power/state" in the terminal.
3. After the successful Entry press the keyboard/powerbutton to break the
Suspend.
4. Observe the eDP/DP/HDMI.

Expected Result
=============
S3 entry and exit should be fine.

Actual Result
===========
Exit is failing.

Analysis & Root Cause
===================
1. We are not observed this with Eywa-4.2-rc3.
2. Result is same when disabling the CONFIG_DRM in the kernel config.

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