[Bug 98928] New: [BXT] Mipi Screen remains blank after resuming from S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98928

            Bug ID: 98928
           Summary: [BXT] Mipi Screen remains blank after resuming from S3
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: luis.botello.ortega at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org
     i915 platform: BXT
     i915 features: display/DSI

Description:
=============================================
Mipi Screen remains blank after resuming from S3 state.

Steps to reproduce:
=============================================
Boot a BXT platform with MIPI panel, go to S3
#echo mem > /sys/power/state
Resume from S3 state by any method (keystroke,click,power button,etc)

Expected Result:
============================================
System resumes fine without any issue

Actual result:
============================================
MIPI screen remains blank after resuming from S3

HW Configuration:
==============================================
Platform : BXT-P
Motherboard model : BroxtonP
Motherboard type : NOTEBOOK Hand Held
Motherboard manufacturer : IntelCorp.
CPU family : Other
CPU information : 06/5c
GPU Card : Intel Corporation Device 5a84 (rev 0a) (prog-if 00 [VGA controller])
Screen  : AUO 10.1" 1920x1200 Non-Touch MIPI Kit - B101UAN01.7

SW Configuration:
===============================================
Kernel
commit d6149d212b69a8e1d9229fe80fca034a0abe1d0e
Author: Mika Kuoppala <mika.kuoppala at intel.com>
Date: Mon Nov 21 14:48:58 2016 +0200
drm-intel-nightly: 2016y-11m-21d-12h-48m-13s UTC integration manifest
Component : drm
tag : libdrm-2.4.73-9-g1924b67
commit : 1924b67 
Component : mesa
tag : 13.0-branchpoint-931-g7a2cfd4
commit : 7a2cfd4 
Component : xf86-video-intel
tag : 2.99.917-736-gbde9460
commit : bde9460 
Component : libva
tag : libva-1.7.2-44-g598fb9e
commit : 598fb9e 
Component : intel-driver
tag : 1.7.2-189-gce55d7e
commit : ce55d7e 
Component : cairo
tag : 1.15.2-75-g3f1a6f7
commit : 3f1a6f7 
Component : xserver
tag : xorg-server-1.19.0-3-gcf88607
commit : cf88607 
Component : macros
tag : util-macros-1.19.0-2-gd7acec2
commit : d7acec2 
Component : intel-gpu-tools
tag : intel-gpu-tools-1.16-156-gcddf996
commit : cddf996 
Component : rendercheck
tag : rendercheck-1.5-9-g44032a7
commit : 44032a7

Additional Info:
===================================================
Dmesg relevant information:
[  109.243947] [drm:generic_exec_sequence [i915]] Starting MIPI sequence 10 -
MIPI_SEQ_POWER_ON
[  109.244012] [drm:mipi_exec_gpio [i915]] 
[  109.244035] [drm:mipi_exec_gpio [i915]] GPIO element not supported on this
platform
[  109.244058] [drm:mipi_exec_delay [i915]] 
[  109.249309] [drm:intel_dsi_pre_enable [i915]] 
[  109.383519] [drm:dpi_send_cmd.constprop.8 [i915]] *ERROR* Video mode command
0x00000042 send failed.

These IGT tests are also failing dur to the same issue:
kms_pipe_crc_basic at suspend-read-crc-pipe-a -> dmesg-fail
kms_pipe_crc_basic at suspend-read-crc-pipe-b -> dmesg-fail
kms_pipe_crc_basic at suspend-read-crc-pipe-c -> dmesg-fail
gem_exec_suspend at basic-s3 -> fail

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