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<body><span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]eDP shows black screen while testing testdisplay -f 38.25,800,832,912,1024,600,603,607,624"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72752">bug 72752</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]eDP shows black screen while testing testdisplay -f 38.25,800,832,912,1024,600,603,607,624"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72752#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]eDP shows black screen while testing testdisplay -f 38.25,800,832,912,1024,600,603,607,624"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72752">bug 72752</a>
from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=72752#c1">comment #1</a>)
<span class="quote">> Can you please bisect where this regression has been introduced?</span >
After bisect, We found first bad point on -next-queued branch
commit dff392dbd258381a6c3164f38420593f2d291e3b
Author: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
Date: Fri Dec 6 17:32:41 2013 -0200
drm/i915: don't touch the VDD when disabling the panel
I don't see a reason to touch VDD when we're disabling the panel:
since the panel is enabled, we don't need VDD. This saves a few sleep
calls from the vdd_on and vdd_off functions at every modeset.
Bugzilla: <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BYT]igt/kms_flip: DP link train fail due to IOSF sideband fabric timeout"
href="show_bug.cgi?id=69693">https://bugs.freedesktop.org/show_bug.cgi?id=69693</a>
Reviewed-by: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>>
Signed-off-by: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
[danvet: Fix the patch mangle wiggle has done ... Spotted by Paulo.
Also drop the runtime_pm_put call which now has to go due to different
patch ordering. Also from Paul.]
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Reverted this commit, the bug unable to reproduce.</pre>
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