[Bug 96701] [APL] [BAT] kms_cursor_legacy some subtest causes [i915]] *ERROR* Potential atomic update failure on pipe

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96701

--- Comment #13 from cprigent <christophe.prigent at intel.com> ---
Created attachment 125059
  --> https://bugs.freedesktop.org/attachment.cgi?id=125059&action=edit
APL-1000Hz-kms_cursor_legacy-kern.log

Tested with 1000 Hz, it still fails:

qa at BXTP5:~$ cat /boot/config-4.7.0-rc6-testing+ |grep CONFIG_HZ
# CONFIG_HZ_PERIODIC is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
qa at BXTP5:~$
qa at BXTP5:~$
qa at BXTP5:~$
qa at BXTP5:~$ cd /opt/X11R7/src/intel-gpu-tools/tests
qa at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests$ sudo -s
[sudo] password for qa:
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests#
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests#
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests# ./kms_cursor_legacy --r
basic-cursor-vs-flip
IGT-Version: 1.15-g2038b24 (x86_64) (Linux: 4.7.0-rc6-testing+ x86_64)
Test requirement not met in function __real_main427, file
kms_cursor_legacy.c:448:
Test requirement: !(n >= data.resources->count_crtcs)
(kms_cursor_legacy:1873) WARNING: page flip 2 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 4 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 7 was delayed, missed 5 frames
(kms_cursor_legacy:1873) WARNING: page flip 8 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 10 was delayed, missed 6 frames
(kms_cursor_legacy:1873) WARNING: page flip 12 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 16 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 19 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 21 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 25 was delayed, missed 4 frames
(kms_cursor_legacy:1873) WARNING: page flip 27 was delayed, missed 19 frames
(kms_cursor_legacy:1873) WARNING: page flip 31 was delayed, missed 10 frames
(kms_cursor_legacy:1873) WARNING: page flip 34 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 42 was delayed, missed 10 frames
(kms_cursor_legacy:1873) WARNING: page flip 45 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 46 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 49 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 51 was delayed, missed 18 frames
(kms_cursor_legacy:1873) WARNING: page flip 53 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 55 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 58 was delayed, missed 3 frames
(kms_cursor_legacy:1873) CRITICAL: Test assertion failure function
basic_cursor_vs_flip, file kms_cursor_legacy.c:411:
(kms_cursor_legacy:1873) CRITICAL: Failed assertion: vbl.sequence ==
vblank_start + 60
(kms_cursor_legacy:1873) CRITICAL: error: 6264 != 6167
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [basic_cursor_vs_flip+0x4d7]
  #2 [__real_main427+0x5c2]
  #3 [main+0x29]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest basic-cursor-vs-flip failed.
**** DEBUG ****
(kms_cursor_legacy:1873) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1024,
height=768, format=0x34325258, tiling=0x0, size=0)
(kms_cursor_legacy:1873) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2,
pitch=4096)
(kms_cursor_legacy:1873) DEBUG: Test requirement passed: set_fb_on_crtc(data,
0, &fb_info)
(kms_cursor_legacy:1873) DEBUG: Test requirement passed: target > 1
(kms_cursor_legacy:1873) DEBUG: Using a target of 64 cursor updates per
half-vblank
(kms_cursor_legacy:1873) WARNING: page flip 2 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 4 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 7 was delayed, missed 5 frames
(kms_cursor_legacy:1873) WARNING: page flip 8 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 10 was delayed, missed 6 frames
(kms_cursor_legacy:1873) WARNING: page flip 12 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 16 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 19 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 21 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 25 was delayed, missed 4 frames
(kms_cursor_legacy:1873) WARNING: page flip 27 was delayed, missed 19 frames
(kms_cursor_legacy:1873) WARNING: page flip 31 was delayed, missed 10 frames
(kms_cursor_legacy:1873) WARNING: page flip 34 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 42 was delayed, missed 10 frames
(kms_cursor_legacy:1873) WARNING: page flip 45 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 46 was delayed, missed 3 frames
(kms_cursor_legacy:1873) WARNING: page flip 49 was delayed, missed 2 frames
(kms_cursor_legacy:1873) WARNING: page flip 51 was delayed, missed 18 frames
(kms_cursor_legacy:1873) WARNING: page flip 53 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 55 was delayed, missed 1 frames
(kms_cursor_legacy:1873) WARNING: page flip 58 was delayed, missed 3 frames
(kms_cursor_legacy:1873) CRITICAL: Test assertion failure function
basic_cursor_vs_flip, file kms_cursor_legacy.c:411:
(kms_cursor_legacy:1873) CRITICAL: Failed assertion: vbl.sequence ==
vblank_start + 60
(kms_cursor_legacy:1873) CRITICAL: error: 6264 != 6167
****  END  ****
Subtest basic-cursor-vs-flip: FAIL (3.078s)
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests#
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests#
root at BXTP5:/opt/X11R7/src/intel-gpu-tools/tests# ./kms_cursor_legacy --r
basic-flip-vs-cursor
IGT-Version: 1.15-g2038b24 (x86_64) (Linux: 4.7.0-rc6-testing+ x86_64)
Test requirement not met in function __real_main427, file
kms_cursor_legacy.c:448:
Test requirement: !(n >= data.resources->count_crtcs)
Subtest basic-flip-vs-cursor: SUCCESS (1.223s)

I see in logs:
Jul 13 19:04:39 BXTP5 kernel: [   26.393104] [drm:intel_pipe_update_start
[i915]] *ERROR* Potential atomic update failure on pipe A
...

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