[Intel-gfx] [PATCH] drm/i915: Cancel vdd off work before suspend

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  366/366              366/366
ILK                 -8              371/371              363/371
SNB                                  450/450              450/450
IVB                 -4              498/498              494/498
BYT                                  289/289              289/289
HSW                 -1              564/564              563/564
BDW                                  417/417              417/417
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 ILK  igt_gem_reset_stats_close-pending-fork-render      TIMEOUT(20, M37M26)PASS(1, M26)      TIMEOUT(1, M26)
 ILK  igt_kms_3d      DMESG_WARN(2, M26)PASS(5, M37M26)      DMESG_WARN(1, M26)
 ILK  igt_kms_flip_flip-vs-dpms-off-vs-modeset      DMESG_WARN(1, M26)PASS(3, M37M26)      DMESG_WARN(1, M26)
 ILK  igt_kms_flip_rcs-flip-vs-panning-interruptible      DMESG_WARN(1, M26)PASS(3, M37M26)      DMESG_WARN(1, M26)
 ILK  igt_kms_flip_rcs-wf_vblank-vs-modeset      DMESG_WARN(1, M26)PASS(4, M37M26)      DMESG_WARN(1, M26)
*ILK  igt_kms_flip_flip-vs-dpms-interruptible      PASS(4, M37M26)      DMESG_WARN(1, M26)
 ILK  igt_kms_flip_plain-flip      DMESG_WARN(2, M26)PASS(4, M37M26)      DMESG_WARN(1, M26)
 ILK  igt_kms_flip_vblank-vs-hang      TIMEOUT(19, M37M26)PASS(1, M26)      TIMEOUT(1, M26)
*IVB  igt_kms_plane_plane-panning-bottom-right-pipe-C-plane-2      PASS(4, M21M34)      DMESG_WARN(1, M34)
*IVB  igt_kms_plane_plane-panning-top-left-pipe-C-plane-2      PASS(2, M21M34)      DMESG_WARN(1, M34)
*IVB  igt_kms_plane_plane-position-covered-pipe-C-plane-2      PASS(2, M21M34)      DMESG_WARN(1, M34)
*IVB  igt_kms_plane_plane-position-hole-pipe-C-plane-1      PASS(5, M21M34)      DMESG_WARN(1, M34)
*HSW  igt_kms_fence_pin_leak      PASS(6, M20M19)      DMESG_WARN(1, M19)
Note: You need to pay more attention to line start with '*'