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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 --- - [BDW]igt/pm_rpm/system-suspend fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78948">78948</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]igt/pm_rpm/system-suspend fails
</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>jinxianx.guo@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>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=99391" name="attach_99391" title="dmesg">attachment 99391</a> <a href="attachment.cgi?id=99391&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: No.
It's new case
Non-working platforms: BDW
==kernel==
--------------------------
-nightly: 0791a325e382bfd2b06673655b90ed64682a519a(fails)
-queued: b6fdd0f2b990006daba19eec676b632faa523fc8(fails)
Author: Shashank Sharma <<a href="mailto:shashank.sharma@intel.com">shashank.sharma@intel.com</a>>
Date: Mon May 19 20:54:03 2014 +0530
drm/i915: Add MIPI mmio reg base
This patch adds a mmio base address variable for DSI display,
to make the DSI code generic, so that, if required, the same code
can be re-used for future platforms with different mmio base.
Signed-off-by: Shashank Sharma <<a href="mailto:shashank.sharma@intel.com">shashank.sharma@intel.com</a>>
Reviewed-by: Damien Lespiau <<a href="mailto:damien.lespiau@intel.com">damien.lespiau@intel.com</a>>
[danvet: Appease checkpatch.]
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
-fixes: e95a2f7509f5219177d6821a0a8754f93892ca56 (works)
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Thu May 8 15:09:19 2014 +0300
drm/i915: Increase WM memory latency values on SNB
On SNB the BIOS provided WM memory latency values seem insufficient to
handle high resolution displays.
In this particular case the display mode was a 2560x1440@60Hz, which
makes the pixel clock 241.5 MHz. It was empirically found that a memory
latency value if 1.2 usec is enough to avoid underruns, whereas the BIOS
provided value of 0.7 usec was clearly too low. Incidentally 1.2 usec
is what the typical BIOS provided values are on IVB systems.
Increase the WM memory latency values to at least 1.2 usec on SNB.
Hopefully this won't have a significant effect on power consumption.
v2: Increase the latency values regardless of the pixel clock
Cc: Robert N <<a href="mailto:crshman@gmail.com">crshman@gmail.com</a>>
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [snb dp hotplug] Pipe B, PCH transcoder B FIFO underrun"
href="show_bug.cgi?id=70254">https://bugs.freedesktop.org/show_bug.cgi?id=70254</a>
Tested-by: Robert Navarro <<a href="mailto:crshman@gmail.com">crshman@gmail.com</a>>
Tested-by: Vitaly Minko <<a href="mailto:vitaly.minko@gmail.com">vitaly.minko@gmail.com</a>>
Cc: <a href="mailto:stable@vger.kernel.org">stable@vger.kernel.org</a>
Signed-off-by: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
==Bug detailed description==
-----------------------------
igt/pm_rpm/system-suspend fails
Output:
./pm_rpm --run-subtest system-suspend IGT-Version: 1.6-gd71add5
(x86_64) (Linux: 3.15.0-rc3_drm-intel-next-queued_b6fdd0_20140520+ x86_64)
Runtime PM support: 1
PC8 residency support: 1
rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from ""mem"" using /dev/rtc0 at Tue May 20 18:28:22 2014
Test assertion failure function system_suspend_subtest, file pm_rpm.c:1390:
Last errno: 2, No such file or directory
Failed assertion: wait_for_suspended()
Subtest system-suspend: FAIL
==Reproduce steps==
----------------------------
1. ./pm_rpm --run-subtest system-suspend</pre>
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