[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 #3 from cprigent <christophe.prigent at intel.com> ---
Created attachment 124907
  --> https://bugs.freedesktop.org/attachment.cgi?id=124907&action=edit
APL_kern.log

Tested on APL with kernel boot command line: "i915.nuclear_pageflip=1".
Only basic-cursor-vs-flip is fail.

# ./kms_cursor_legacy --r basic-cursor-vs-flip
IGT-Version: 1.15-g88c1f7c (x86_64) (Linux: 4.7.0-rc5-nightly+ x86_64)
Test requirement not met in function __real_main436, file
kms_cursor_legacy.c:457:
Test requirement: !(n >= data.resources->count_crtcs)
(kms_cursor_legacy:1919) WARNING: page flip 47 was delayed, missed 11 frames
(kms_cursor_legacy:1919) WARNING: page flip 48 was delayed, missed 26 frames
(kms_cursor_legacy:1919) WARNING: page flip 51 was delayed, missed 2 frames
(kms_cursor_legacy:1919) WARNING: page flip 53 was delayed, missed 11 frames
(kms_cursor_legacy:1919) WARNING: page flip 55 was delayed, missed 7 frames
(kms_cursor_legacy:1919) WARNING: page flip 56 was delayed, missed 8 frames
(kms_cursor_legacy:1919) WARNING: page flip 57 was delayed, missed 7 frames
(kms_cursor_legacy:1919) CRITICAL: Test assertion failure function
basic_cursor_vs_flip, file kms_cursor_legacy.c:420:
(kms_cursor_legacy:1919) CRITICAL: Failed assertion: vbl.sequence ==
vblank_start + 60
(kms_cursor_legacy:1919) CRITICAL: error: 7060 != 6988
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [basic_cursor_vs_flip+0x4d7]
  #2 [__real_main436+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:1919) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1024,
height=768, format=0x34325258, tiling=0x0, size=0)
(kms_cursor_legacy:1919) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2,
pitch=4096)
(kms_cursor_legacy:1919) DEBUG: Test requirement passed: set_fb_on_crtc(data,
0, &fb_info)
(kms_cursor_legacy:1919) DEBUG: Test requirement passed: target > 1
(kms_cursor_legacy:1919) DEBUG: Using a target of 128 cursor updates per
half-vblank
(kms_cursor_legacy:1919) WARNING: page flip 47 was delayed, missed 11 frames
(kms_cursor_legacy:1919) WARNING: page flip 48 was delayed, missed 26 frames
(kms_cursor_legacy:1919) WARNING: page flip 51 was delayed, missed 2 frames
(kms_cursor_legacy:1919) WARNING: page flip 53 was delayed, missed 11 frames
(kms_cursor_legacy:1919) WARNING: page flip 55 was delayed, missed 7 frames
(kms_cursor_legacy:1919) WARNING: page flip 56 was delayed, missed 8 frames
(kms_cursor_legacy:1919) WARNING: page flip 57 was delayed, missed 7 frames
(kms_cursor_legacy:1919) CRITICAL: Test assertion failure function
basic_cursor_vs_flip, file kms_cursor_legacy.c:420:
(kms_cursor_legacy:1919) CRITICAL: Failed assertion: vbl.sequence ==
vblank_start + 60
(kms_cursor_legacy:1919) CRITICAL: error: 7060 != 6988
****  END  ****
Subtest basic-cursor-vs-flip: FAIL (2.782s)

Platform: APL system
CPU Name : Intel(R) Genuine Processor @ 1.1 GHz (family: 6, model: 12,
stepping: 9) 4 cores
QDF : Q6HE
SoC : B1
CRB : Apollo Lake DDR3L RVP1A FAB2
Reworks : R19, R20

Software 
Bios: 144_B10 - APLK_B0_IFWI_X64_R_2016_06_27_0956_SPI_RVP1 from from
\\gar\ec\proj\ba\CCG\APL
BIOS\External\BIOS_Release\Daily\v144_10_2016_WW27.1\IFWI\IFWI_RVP1_Release\IFWI
KSC: 1.15
Linux distribution: Ubuntu 16.04 64 bits
Kernel: drm-intel-nightly 4.7.0-rc4 5c244f4 from
http://cgit.freedesktop.org/drm-intel/
                commit 5c244f4b128c6274755007e080d46e0a61b71534
                Author: Chris Wilson <chris at chris-wilson.co.uk>
                Date:   Fri Jun 24 16:17:56 2016 +0100
                drm-intel-nightly: 2016y-06m-24d-15h-17m-32s UTC integration
manifest
drm: libdrm-2.4.68-9 625d181 from git://anongit.freedesktop.org/mesa/drm
mesa: mesa-11.2.2 56cd706 from git://anongit.freedesktop.org/mesa/mesa
cairo: 1.15.2 db8a7f1 from git://anongit.freedesktop.org/cairo
server: xorg-server-1.18.0-419 7397a21 from
git://git.freedesktop.org/git/xorg/xserver
xf86-video-intel: 2.99.917-670 cac7c8d from
git://git.freedesktop.org/git/xorg/driver/xf86-video-intel
libva: libva-1.7.0-26 c36971c from git://git.freedesktop.org/git/vaapi/libva
vaapi-intel-driver: 1.7.0-52 f47e513 from
git://git.freedesktop.org/git/vaapi/intel-driver
DMC 1.07
GuC 8.7
Intel-Gpu-Tools: 1.15-54 88c1f7c from
http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git

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