[Bug 85216] New: [BSW]eDP monitor no signal before starting kernel when edp and HDMI both connected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85216

            Bug ID: 85216
           Summary: [BSW]eDP monitor no signal before starting kernel when
                    edp and HDMI both connected
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: wendy.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 108081
  --> https://bugs.freedesktop.org/attachment.cgi?id=108081&action=edit
dmesg file

==System Environment==
--------------------------
Regression: No

Non-working platforms: BSW RVP FAB2 which done R10 rework

This is not regression, this issue happened after one bug fix:( 84265 - [BSW
Bisected]System fails to find eDP monitor), which merged up Ville's patch: 

commit e17ac6db2ef99388b750b2141c11974dc5742913
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Thu Oct 9 19:37:15 2014 +0300

    drm/i915: Don't trust the DP_DETECT bit for eDP ports on CHV


==kernel==
--------------------------
origin/drm-intel-nightly: 8d1dbeed28a28ecf964769bf089503f0c90ffdaa(fails)
commit 8d1dbeed28a28ecf964769bf089503f0c90ffdaa
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date: Sun Oct 19 16:54:55 2014 +0200

    drm-intel-nightly: 2014y-10m-19d-14h-54m-38s UTC integration manifest

==Bug detailed description==
Boot up BSW with edp and HDMI both connected, edp monitor no signal, only HDMI
has signal before "start kernel" phase; after "start kernel" phase, both edp
and HDMI have signal output.

==Reproduce steps==
----------------------------
1. Boot up system with edp and HDMI connected
2. Observer two monitor display, will observe only HDMI has signal output in
BIOS post and load kernel phase, after "start kernel" edp will has signal.

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