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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BYT/BSW Bisected] Suspend Resume time increase to 6000+ ms"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90868">90868</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BYT/BSW Bisected] Suspend Resume time increase to 6000+ ms
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>critical
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>wendy.wang@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=116315" name="attach_116315" title="suspend resume time failure dmesg">attachment 116315</a> <a href="attachment.cgi?id=116315&action=edit" title="suspend resume time failure dmesg">[details]</a></span>
suspend resume time failure dmesg

==System Environment==       
-----------------------------------------------------
Kernel Regression: Yes
Non-working platforms: BYT/HSW


Bisect result show :
490f400db5d886fc28566af69b02f6497f31be4b is the first bad commit
commit 490f400db5d886fc28566af69b02f6497f31be4b
Author: Maarten Lankhorst <<a href="mailto:maarten.lankhorst@linux.intel.com">maarten.lankhorst@linux.intel.com</a>>
Date:   Mon Jun 1 12:50:05 2015 +0200

    drm/i915: Make intel_display_suspend atomic, v2.

    Calculate all state using a normal transition, but afterwards fudge
    crtc->state->active back to its old value. This should still allow
    state restore in setup_hw_state to work properly.

    Calling intel_set_mode will cause intel_display_set_init_power to be
    called, make sure init_power gets set again afterwards.

    Changes since v1:
    - Fix to compile with v2 of the patch that adds intel_display_suspend.
    - Add intel_display_set_init_power.
    - Set return value to int to allow error checking.

    Signed-off-by: Maarten Lankhorst <<a href="mailto:maarten.lankhorst@linux.intel.com">maarten.lankhorst@linux.intel.com</a>>
    Reviewed-by: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
    Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>

:040000 040000 b53b1c05451c72787a26e1efc85c0e544ae1ec94
1e8df3b7f16307d9e637276c10c54e                                                 
                                                             3b94850486 M   
drivers

==Bug detailed description==
Suspend resume time is too large: 6000+ ms


==Reproduce steps==
----------------------------
1. Boot up system with initcall_debug drm.debug=0xe kernel parameter
2. echo 0 > /sys/class/rtc/rtc0/wakealarm 
echo +20 > /sys/class/rtc/rtc0/wakealarm 
echo mem > /sys/power/state
3. run attached script.</pre>
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