[Bug 88977] [BSW]igt/gem_evict_everything sporadically causes *ERROR* CPU pipe B FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88977

--- Comment #5 from lu hua <huax.lu at intel.com> ---
kms_render_gpu-blit also has this error.
@test: Intel_gpu_tools/igt_kms_render_gpu-blit
info: @@@Returncode: 0

test case start at: Sun Jan 25 16:34:45 2015
test case end at:   Sun Jan 25 16:36:07 2015

Errors:


Dmesg:
<6>[ 1690.121356] [drm] HPD interrupt storm detected on connector eDP-1:
switching from hotplug detection to polling
<3>[ 1697.299881] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun


Output:
             command   pid dev master a   uid      magic
Test Environment check: Succeeded.
[1/1] dmesg-warn: 1 |
[1/1] dmesg-warn: 1 /


Thank you for running Piglit!
Results have been written to /GFX/Test/Piglit/piglit/t
{
    "results_version": 2,
    "uname": "Linux x-bsw01 3.19.0-rc7_drm-intel-nightly_0eafcb_20150204+ #38
SMP Wed Feb 4 11:26:26 CST 2015 x86_64 x86_64 x86_64 GNU/Linux\n",
    "time_elapsed": 76.17300415039062,
    "tests": {
        "igt/kms_render/gpu-blit": {
            "dmesg": "[ 1697.299881] [drm:valleyview_pipestat_irq_handler
[i915]] *ERROR* CPU pipe B FIFO underrun",
            "returncode": 0,
            "err": "",
            "environment": "PIGLIT_SOURCE_DIR=\"/GFX/Test/Piglit/piglit\"
PIGLIT_PLATFORM=\"mixed_glx_egl\"",
            "command":
"/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests/kms_render --run-subtest
gpu-blit",
            "result": "dmesg-warn",
            "time": 76.0097291469574,
            "out": "IGT-Version: 1.9-g87edb51 (x86_64) (Linux:
3.19.0-rc7_drm-intel-nightly_0eafcb_20150204+ x86_64)\nBeginning test gpu-blit
with 1920x1080 @ 60Hz / RGB565 on pipe A, encoder TMDS, connector eDP\nTest
gpu-blit with 1920x1080 @ 60Hz / RGB565 on pipe A, encoder TMDS, connector eDP:
PASSED\nBeginning test gpu-blit with 1920x1080 @ 60Hz / XRGB8888 on pipe A,
encoder TMDS, connector eDP\nTest gpu-blit with 1920x1080 @ 60Hz / XRGB8888 on
pipe A, encoder TMDS, connector eDP: PASSED\nBeginning test gpu-blit with
1920x1080 @ 60Hz / XRGB2101010 on pipe A, encoder TMDS, connector eDP\nTest
gpu-blit with 1920x1080 @ 60Hz / XRGB2101010 on pipe A, encoder TMDS, connector
eDP: PASSED\nBeginning test gpu-blit with 1920x1080 @ 60Hz / ARGB8888 on pipe
A, encoder TMDS, connector eDP\nTest gpu-blit with 1920x1080 @ 60Hz / ARGB8888
on pipe A, encoder TMDS, connector eDP: PASSED\nBeginning test gpu-blit with
1920x1080 @ 60Hz / RGB565 on pipe B, encoder TMDS, connector eDP\nTest gpu-blit
with 1920x1080 @ 60Hz / RGB565 on pipe B, encoder TMDS, connector eDP:
PASSED\nBeginning test gpu-blit with 1920x1080 @ 60Hz / XRGB8888 on pipe B,
encoder TMDS, connector eDP\nTest gpu-blit with 1920x1080 @ 60Hz / XRGB8888 on
pipe B, encoder TMDS, connector eDP: PASSED\nBeginning test gpu-blit with
1920x1080 @ 60Hz / XRGB2101010 on pipe B, encoder TMDS, connector eDP\nTest
gpu-blit with 1920x1080 @ 60Hz / XRGB2101010 on pipe B, encoder TMDS, connector
eDP: PASSED\nBeginning test gpu-blit with 1920x1080 @ 60Hz / ARGB8888 on pipe
B, encoder TMDS, connector eDP\nTest gpu-blit with 1920x1080 @ 60Hz / ARGB8888
on pipe B, encoder TMDS, connector eDP: PASSED\nSubtest gpu-blit: SUCCESS
(74.839s)\n"
        }
    },

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