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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_cursor_crc/cursor-size-change sporadically causes *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88977#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_cursor_crc/cursor-size-change sporadically causes *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88977">bug 88977</a>
from <span class="vcard"><a class="email" href="mailto:yex.tian@intel.com" title="ye.tian <yex.tian@intel.com>"> <span class="fn">ye.tian</span></a>
</span></b>
<pre>Teset it on the latest nightly kernel and latest igt, It still exists.
output:
--------------------
root@x-bsw08:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_cursor_crc
--run-subtest cursor-size-change
IGT-Version: 1.10-ge1ce5ea (x86_64) (Linux:
4.0.0_drm-intel-nightly_b9fe35_20150421+ x86_64)
Beginning cursor-size-change on pipe A, connector eDP-1
Test assertion failure function igt_assert_crc_equal, file igt_debugfs.c:207:
Failed assertion: a->crc[i] == b->crc[i]
error: 0x2cae1c != 0x63f27f
Stack trace:
#0 [__igt_fail_assert+0xf1]
#1 [igt_assert_crc_equal+0x78]
#2 [test_cursor_size+0x1b1]
#3 [run_test.constprop.3+0x212]
#4 [__real_main556+0x1a0]
#5 [main+0x21]
#6 [__libc_start_main+0xf5]
#7 [_start+0x29]
#8 [<unknown>+0x29]
Subtest cursor-size-change failed.
**** DEBUG ****
Test requirement passed: cursor_w <= data->cursor_max_w && cursor_h <=
data->cursor_max_h
display: eDP-1: set_pipe(A)
display: A.3: plane_set_fb(0)
display: commit {
display: eDP-1: Selecting pipe A
display: eDP-1: SetCursor pipe A, disabling
display: }
igt_create_fb_with_bo_size(width=1920, height=1080, format=0x34325258 [bpp=32],
tiling=0x0, size=0
igt_create_fb_with_bo_size(handle=1, pitch=7680)
display: A.0: plane_set_fb(51)
display: commit {
display: eDP-1: Selecting pipe A
display: eDP-1: SetCrtc pipe A, fb 51, panning (0, 0), mode 1920x1080
display: }
display: A.3: plane_set_fb(0)
Beginning cursor-size-change on pipe A, connector eDP-1
igt_create_fb_with_bo_size(width=256, height=256, format=0x34325241 [bpp=32],
tiling=0x0, size=0
igt_create_fb_with_bo_size(handle=2, pitch=1024)
display: A.3: plane_set_fb(53)
display: A.3: plane_set_size (256x256)
display: A.3: plane_set_fb(0)
display: commit {
display: eDP-1: Selecting pipe A
display: eDP-1: SetCursor pipe A, disabling
display: }
Test assertion failure function igt_assert_crc_equal, file igt_debugfs.c:207:
Failed assertion: a->crc[i] == b->crc[i]
error: 0x2cae1c != 0x63f27f
**** END ****
Subtest cursor-size-change: FAIL (1.866s)
root@x-bsw08:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | grep
ERROR
<3>[ 479.146745] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
A FIFO underrun</pre>
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