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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW bisected] Desktop-EDP can not work"
href="https://bugs.freedesktop.org/show_bug.cgi?id=61542">61542</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW bisected] Desktop-EDP can not work
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bingx.a.yan@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=75619" name="attach_75619" title="EDP-no-lightup.dmesg">attachment 75619</a> <a href="attachment.cgi?id=75619&action=edit" title="EDP-no-lightup.dmesg">[details]</a></span>
EDP-no-lightup.dmesg
Environment:
--------------------
HSW desktop hd environment:
Shark Bay Desktop Beta SDP (Flathead Creek): C3 stepping (id=0x0412, rev 06),
Lynx Point 02 (B0 stepping) and Host bridge id=0x0c00 (rev 06) 4Cores/4Thread,
CPU i5-4570 3.2GHz, GT2 800MHz; BIOS version:
FC_Preproduction_Q87_5MB_BIOS-108_ME-9.0.0.1308
Description:
--------------------
1.Connecting edp monitor and boot.
2.After showing the list of grub,edp monitor can not work.
3.Just on edp monitor and hsw-desktop.
4.Below is the result of bisect.
Bisect result:
--------------------
cc464b2a17c59adedbdc02cc54341d630354edc3 is the first bad commit
commit cc464b2a17c59adedbdc02cc54341d630354edc3
Author: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
Date: Fri Jan 25 16:59:16 2013 -0200
drm/i915: set TRANSCODER_EDP even earlier
Instead of setting it at the beginning of haswell_crtc_mode_set, let's
set it at the beginning of intel_crtc_mode_set. When
intel_crt_mode_set calls drm_vblank_pre_modeset we already need to
have the transcoder_edp correctly set, because eventually
drm_vblank_pre_modeset calls functions that call i915_pipe_enabled
from i915_irq.c, which will read PIPECONF(cpu_transcoder).
This is a bug that affects us since we added support for
TRANSCODER_EDP, but I was only able to see the problem after
suspending a machine with the power well disabled (got an "unclaimed
register" error.
Signed-off-by: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
Reviewed-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
I attached the dmesg.</pre>
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