On CI test fails.
See: https://intel-gfx-ci.01.org/CI/CI_DRM_2257/fi-byt-n2820/igt@kms_busy@basic-flip-default-a.html

Dmesg:
https://intel-gfx-ci.01.org/CI/CI_DRM_2257/fi-byt-n2820/dmesg-during.log



Out	
IGT-Version: 1.17-gd854116 (x86_64) (Linux: 4.10.0-CI-CI_DRM_2257+ x86_64)
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [flip_to_fb+0xc2]
  #2 [<unknown>+0xc2]
Subtest basic-flip-default-A: FAIL (1.664s)
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:333:
Test requirement: display.is_atomic
Test requirement not met in function __real_main285, file kms_busy.c:308:
Test requirement: !(n >= display.n_pipes)
Err	
(kms_busy:9550) CRITICAL: Test assertion failure function flip_to_fb, file kms_busy.c:131:
(kms_busy:9550) CRITICAL: Failed assertion: nanosleep(&tv, NULL) == -1
(kms_busy:9550) CRITICAL: flip to fb[0] blocked waiting for busy fbSubtest basic-flip-default-A failed.
**** DEBUG ****
(kms_busy:9550) DEBUG: Test requirement passed: gem_has_ring(display.drm_fd, e->exec_id | e->flags)
(kms_busy:9550) igt-kms-DEBUG: display: HDMI-A-1: set_pipe(A)
(kms_busy:9550) igt-kms-DEBUG: display: HDMI-A-1: Selecting pipe A
(kms_busy:9550) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1600, height=900, format=0x34325258, tiling=0x100000000000001, size=0)
(kms_busy:9550) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_busy:9550) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_busy:9550) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=1, pitch=6656)
(kms_busy:9550) igt-kms-DEBUG: display: A.0: plane_set_fb(51)
(kms_busy:9550) DEBUG: Test requirement passed: (output = set_fb_on_crtc(dpy, pipe, &fb[0]))
(kms_busy:9550) igt-kms-DEBUG: display: commit {
(kms_busy:9550) igt-kms-DEBUG: display:     HDMI-A-1: Selecting pipe A
(kms_busy:9550) igt-kms-DEBUG: display:     HDMI-A-1: SetCrtc pipe A, fb 51, src (0, 0), mode 1600x900
(kms_busy:9550) igt-kms-DEBUG: display:     SetPlane pipe A, plane 1, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetPlane pipe A, plane 2, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetCursor pipe A, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetCrtc pipe B, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetPlane pipe B, plane 1, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetPlane pipe B, plane 2, disabling
(kms_busy:9550) igt-kms-DEBUG: display:     SetCursor pipe B, disabling
(kms_busy:9550) igt-kms-DEBUG: display: }
(kms_busy:9550) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1600, height=900, format=0x34325258, tiling=0x100000000000001, size=0)
(kms_busy:9550) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_busy:9550) drmtest-DEBUG: Test requirement passed: is_i915_device(fd) && has_known_intel_chipset(fd)
(kms_busy:9550) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2, pitch=6656)
(kms_busy:9550) ioctl-wrappers-DEBUG: Test requirement passed: gem_has_ring(fd, ring)
(kms_busy:9550) igt-dummyload-DEBUG: Test requirement passed: nengine
(kms_busy:9550) CRITICAL: Test assertion failure function flip_to_fb, file kms_busy.c:131:
(kms_busy:9550) CRITICAL: Failed assertion: nanosleep(&tv, NULL) == -1
(kms_busy:9550) CRITICAL: flip to fb[0] blocked waiting for busy fb****  END  ****
Environment	
PIGLIT_SOURCE_DIR="/opt/igt/piglit" PIGLIT_PLATFORM="mixed_glx_egl"
Command	
/opt/igt/tests/kms_busy --run-subtest basic-flip-default-A