On CI kms_pipe_crc_basic@nonblocking-crc-pipe-b/c fails on CI. https://intel-gfx-ci.01.org/CI/CI_DRM_2275/fi-skl-6770hq/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b.html Dmesg: https://intel-gfx-ci.01.org/CI/CI_DRM_2275/fi-skl-6770hq/dmesg-during.log https://intel-gfx-ci.01.org/CI/CI_DRM_2291/fi-skl-6770hq/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-c.html Dmesg: https://intel-gfx-ci.01.org/CI/CI_DRM_2291/fi-skl-6770hq/dmesg-during.log One dmesg: Out IGT-Version: 1.17-gd91fec7 (x86_64) (Linux: 4.10.0-CI-CI_DRM_2275+ x86_64) nonblocking-crc-pipe-B: Testing connector DP-2 using pipe B nonblocking-crc-pipe-B: Testing connector DP-4 using pipe B Stack trace: #0 [__igt_fail_assert+0x101] #1 [test_read_crc.constprop.3+0x524] #2 [__real_main202+0x28a] #3 [main+0x33] #4 [__libc_start_main+0xf0] #5 [_start+0x29] #6 [<unknown>+0x29] Subtest nonblocking-crc-pipe-B: FAIL (1.198s) Err (kms_pipe_crc_basic:8857) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:143: (kms_pipe_crc_basic:8857) CRITICAL: Failed assertion: n_crcs <= 3 + 1 (kms_pipe_crc_basic:8857) CRITICAL: Last errno: 11, Resource temporarily unavailable (kms_pipe_crc_basic:8857) CRITICAL: error: 5 > 4 Subtest nonblocking-crc-pipe-B failed.
Similar issues like on https://bugs.freedesktop.org/show_bug.cgi?id=99788
(In reply to Jani Saarinen from comment #1) > Similar issues like on https://bugs.freedesktop.org/show_bug.cgi?id=99788 Have had no luck so far reproducing this one here, probably because none of the recent DUTs that I have has a full-grown DP connector. Will get a miniDP->DP connector and try on my KBL.
commit 2c64f11f38f44d21419dc15adc7162bd83f65664 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Mar 13 15:58:26 2017 +0000 igt/kms_pipe_crc_basic: Tighten timings for CRC readback The number of vblanks that pass whilst we read back the CRCs is depended upon CPU scheduling -- we may take longer than expected and end up reading more CRCs. Align the start of the loop to a vblank. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100132 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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