Created attachment 129300 [details]
dmesg

Subtests kms_plane_lowres crash on SKL with last setup:

setup:
=========
Platform SKL Gigabyte
CPU: Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz (family 6, model 94, stepping 3)
GPU: Intel® HD Graphics 530 - Intel Corporation Sky Lake Integrated Graphics
(rev 06)
Motherboard version: H170N-WIFI-CF
Memory: 2x 4GB Kingston 9905622-055.A00G

Software
===========
Bios: F3
Linux distribution: Ubuntu 16.04 64 bits
DMC 1.26 from https://01.org/sites/default/files/downloads/intelr-graphics-linux/skldmcver126.tar_1.bz2
GUC 6.1 from https://01.org/sites/default/files/downloads/intelr-graphics-linux/sklgucver61.tar.bz2
Kernel: drm-tip: 2017y-01m-30d-21h-14m-37s UTC integration manifest
commit 123d798c350471aba7e0625c154c6d9e395756c8
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:  Mon Jan 30 21:15:12 2017 +0000
drm:libdrm-2.4.75-3-gd4b8344 from git://anongit.freedesktop.org/mesa/drm
mesa: mesa-13.0.3-bec04114 from git://anongit.freedesktop.org/mesa/mesa
cairo:1.15.4-68bbb693 from git://anongit.freedesktop.org/cairo
xserver: xorg-server-1.19.0-66-ga6fcb15 from git://git.freedesktop.org/git/xorg/xserver
xf86-video-intel: 2.99.917-750-g2d6f2e8 from git://git.freedesktop.org/git/xorg/driver/xf86-video-intel
libva:  libva-1.7.3.pre1-48-ge677ad9 from git://git.freedesktop.org/git/vaapi/libva
vaapi-intel-driver: 1.7.3-287-g05d2d25 from git://git.freedesktop.org/git/vaapi/intel-driver
intel-gpu-tool:intel-gpu-tools-1.17-162-g7b9499f

Actual results:
===============
sudo ./kms_plane_lowres --r pipe-C-tiling-none --debug
IGT-Version: 1.17-ga2fa75c (x86_64) (Linux: 4.10.0-rc6-tip-201702010159+ x86_64)
(kms_plane_lowres:29486) igt-core-DEBUG: Test requirement passed: !igt_run_in_simulation()
(kms_plane_lowres:29486) drmtest-DEBUG: Test requirement passed: !(fd<0)
(kms_plane_lowres:29486) drmtest-DEBUG: Test requirement passed: drmSetMaster(fd) == 0
(kms_plane_lowres:29486) igt-kms-DEBUG: VT: graphics mode set (mode was 0x0)
(kms_plane_lowres:29486) igt-kms-DEBUG: display: init {
(kms_plane_lowres:29486) igt-kms-DEBUG: display: }
(kms_plane_lowres:29486) igt-core-DEBUG: Starting subtest: pipe-C-tiling-none
(kms_plane_lowres:29486) DEBUG: Test requirement passed: data->display.is_atomic
(kms_plane_lowres:29486) DEBUG: Test requirement passed: !(pipe >= data->display.n_pipes)
Testing connector HDMI-A-2 using pipe C
(kms_plane_lowres:29486) igt-debugfs-DEBUG: Using generic frame CRC ABI
(kms_plane_lowres:29486) igt-kms-DEBUG: display: HDMI-A-2: set_pipe(C)
(kms_plane_lowres:29486) igt-kms-DEBUG: display: HDMI-A-2: Selecting pipe C
(kms_plane_lowres:29486) igt-kms-DEBUG: Test requirement passed: !(fid == NULL)
Received signal SIGSEGV.
Stack trace: 
 #0 [fatal_sig_handler+0x116]
 #1 [killpg+0x40]
 #2 [kmstest_get_crtc+0x11f]
 #3 [test_plane_position_with_output.constprop.6+0x88]
 #4 [test_plane_position.constprop.5+0xf3]
 #5 [run_tests_for_pipe.constprop.4+0x15a]
 #6 [__real_main327+0x99]
 #7 [_start+0x0]
 #8 [__libc_start_main+0xf0]
 #9 [_start+0x29]
 #10 [<unknown>+0x29]
Subtest pipe-C-tiling-none: CRASH (0.005s)
(kms_plane_lowres:29486) igt-core-DEBUG: Exiting with status code 139
(kms_plane_lowres:29486) igt-kms-DEBUG: VT: original mode 0x0 restored