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<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [PNV/BDW Regression]Subcases direct-render and gpu-blit of igt/kms_render fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78873">78873</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>[PNV/BDW Regression]Subcases direct-render and gpu-blit of igt/kms_render fail
</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>
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<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
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<pre>==System Environment==
--------------------------
Regression: Yes.
It was igt issue
Bad commit：252d1151a809683b0f6ed2c546358b7375a27f18
Good commit: d2d0a96eca2e63a7ec75fd15b81808c42ae796b7
Non-working platforms: PNV BDW
==kernel==
--------------------------
-nightly: f79ba79cf037eea9ee757ad37730b00f43d5ef80 (fails)
-queued: d3b448d9917a3d6531e499d88bfb13ea5e31e4ad (fails)
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Fri May 16 18:59:00 2014 +0100
drm/i915: Only unpin the default ctx object if it exists
Since commit 691e6415c891b8b2b082a120b896b443531c4d45
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Apr 9 09:07:36 2014 +0100
drm/i915: Always use kref tracking for all contexts.
we have contexts everywhere, and so we must be careful to distinguish
fake contexts, which do not have an associated bo, and real ones, which
do. In particular, we now need to be careful not to dereference NULL
pointers.
This is one such example, as the commit highlighted above failed to move
the unpinning of the default ctx object into the real-context-only
branch.
Reported-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [regression] module reload Oopses all over the place"
href="show_bug.cgi?id=78792">https://bugs.freedesktop.org/show_bug.cgi?id=78792</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Cc: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Cc: Ben Widawsky <<a href="mailto:benjamin.widawsky@intel.com">benjamin.widawsky@intel.com</a>>
Cc: Mika Kuoppala <<a href="mailto:mika.kuoppala@intel.com">mika.kuoppala@intel.com</a>>
Cc: 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>>
-fixes: e95a2f7509f5219177d6821a0a8754f93892ca56 (fails)
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==
-----------------------------
Subcases direct-render and gpu-blit of igt/kms_render fail
Output:
./kms_render --run-subtest gpu-blit
IGT-Version: 1.6-g252d115 (i686) (Linux:
3.15.0-rc3_drm-intel-next-queued_d3b448_20140518+ i686)
Beginning test gpu-blit with 1024x600 @ 60Hz / RGB565 on pipe B, encoder LVDS,
connector LVDS
Test gpu-blit with 1024x600 @ 60Hz / RGB565 on pipe B, encoder LVDS, connector
LVDS: PASSED
Beginning test gpu-blit with LVDS @ 1868767276Hz / RGB888 on pipe B, encoder
LVDS, connector LVDS
Test gpu-blit with LVDS @ 1868767276Hz / RGB888 on pipe B, encoder LVDS,
connector LVDS: SKIPPED
Beginning test gpu-blit with P▒ @ 1Hz / XRGB8888 on pipe B, encoder LVDS,
connector LVDS
Test assertion failure function gem_create, file ioctl_wrappers.c:382:
Last errno: 22, Invalid argument
Failed assertion: drmIoctl((fd), ((((2U|1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x1b)) << 0) | ((((sizeof(struct drm_i915_gem_create)))) <<
((0+8)+8)))), (&create)) == 0
Subtest gpu-blit: FAIL
==Reproduce steps==
----------------------------
1. ./kms_render --run-subtest gpu-blit</pre>
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