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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_render causes *ERROR* pipe A underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85908">85908</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BSW]igt/kms_render causes *ERROR* pipe A underrun
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>huax.lu@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=108938" name="attach_108938" title="dmesg">attachment 108938</a> <a href="attachment.cgi?id=108938&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure, it also has <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_render subcases fail"
href="show_bug.cgi?id=82649">bug 82649</a>
Non-working platforms: BSW
==kernel==
--------------------------
drm-intel-nightly/f56717bdf29eb7d6a9ec15f095ea2a6858895473
==Bug detailed description==
--------------------------
It causes [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe A
underrun. It also has <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_render subcases fail"
href="show_bug.cgi?id=82649">bug 82649</a> about fail.
output:
IGT-Version: 1.8-ge622850 (x86_64) (Linux:
3.18.0-rc3_drm-intel-nightly_f56717_20141105+ x86_64)
Beginning test direct-render with 1920x1080 @ 60Hz / RGB565 on pipe A, encoder
TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / RGB565 on pipe A, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / XRGB8888 on pipe A,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / XRGB8888 on pipe A, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / XRGB2101010 on pipe A,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / XRGB2101010 on pipe A, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / ARGB8888 on pipe A,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / ARGB8888 on pipe A, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / RGB565 on pipe B, encoder
TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / RGB565 on pipe B, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / XRGB8888 on pipe B,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / XRGB8888 on pipe B, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / XRGB2101010 on pipe B,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / XRGB2101010 on pipe B, encoder TMDS,
connector eDP: PASSED
Beginning test direct-render with 1920x1080 @ 60Hz / ARGB8888 on pipe B,
encoder TMDS, connector eDP
Test direct-render with 1920x1080 @ 60Hz / ARGB8888 on pipe B, encoder TMDS,
connector eDP: PASSED
Subtest direct-render: SUCCESS (78.505s)
[root@x-bsw01 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[ 449.807056] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe B underrun
<3>[ 449.807235] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
<3>[ 459.811162] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe A underrun
<3>[ 468.779569] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe A underrun
<3>[ 479.185122] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe A underrun
<3>[ 488.153517] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe A underrun
<3>[ 498.163350] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
<3>[ 499.964961] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe B underrun
<3>[ 499.964998] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
<3>[ 517.535526] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
<3>[ 526.503783] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
<3>[ 529.793110] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe B underrun
<3>[ 529.793307] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
==Reproduce steps==
----------------------------
1. ./kms_render --run-subtest direct-render</pre>
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