igt@kms_pm_lpsp@kms-lpsp@* - fail - Test assertion failure function test_lpsp, Failed assertion: igt_wait(lpsp_is_enabled(data), 1000, 100)

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1556620588?query_key=b1c7628b0c520df8d66a1e20d125b433b0c23585

Stdout	
Opened device: /dev/dri/card0
DMC: fw loaded: yes
Starting subtest: kms-lpsp
Starting dynamic subtest: kms-lpsp-HDMI-A
Stack trace:
  #0 ../../../usr/src/igt-gpu-tools/lib/igt_core.c:1988 __igt_fail_assert()
  #1 ../../../usr/src/igt-gpu-tools/tests/intel/kms_pm_lpsp.c:164 __igt_unique____real_main192()
  #2 [<unknown>+0x1608400]
Dynamic subtest kms-lpsp-HDMI-A: FAIL (1.399s)
Subtest kms-lpsp: FAIL (1.450s)

Stderr	
Starting subtest: kms-lpsp
Starting dynamic subtest: kms-lpsp-HDMI-A
(kms_pm_lpsp:2097) CRITICAL: Test assertion failure function test_lpsp, file ../../../usr/src/igt-gpu-tools/tests/intel/kms_pm_lpsp.c:185:
(kms_pm_lpsp:2097) CRITICAL: Failed assertion: igt_wait(lpsp_is_enabled(data), 1000, 100)
(kms_pm_lpsp:2097) CRITICAL: HDMI-A-1: lpsp is not enabled
i915_power_domain_info:
Power well/domain         Use count
always-on                 6
  DISPLAY_CORE            1
  PIPE_A                  1
  PIPE_B                  0
  PIPE_C                  0
  PIPE_D                  0
  PIPE_PANEL_FITTER_A     0
  PIPE_PANEL_FITTER_B     0
  PIPE_PANEL_FITTER_C     0
  PIPE_PANEL_FITTER_D     0
  TRANSCODER_A            1
  TRANSCODER_B            0
  TRANSCODER_C            0