https://bugs.freedesktop.org/show_bug.cgi?id=105915

Bug ID: 105915 Summary: [IGT] igt@kms_cursor_crc@cursor-128x128-rapid-movement / cursor-256x256-rapid-movement igt-debugfs-WARNING: Warning on condition crc->crc[i] == 0xffffffff in function crc_sanity_checks, file igt_debugfs.c:833 Product: DRI Version: DRI git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: IGT Assignee: dri-devel@lists.freedesktop.org Reporter: ricardo.o.perez@intel.com

Created attachment 138642 --> https://bugs.freedesktop.org/attachment.cgi?id=138642&action=edit dmesg and kern-logs

CNL QA systems are showing a WARN with the following tests:

igt@kms_cursor_crc@cursor-128x128-rapid-movement igt@kms_cursor_crc@cursor-256x256-rapid-movement

Software Version:

IGT-Version: 1.22-g0721161 (x86_64) (Linux: 4.16.0-rc6-drm-intel-qa-ww12-commit-4db112a+ x86_64)

Warn:

Beginning cursor-256x256-rapid-movement on pipe A, connector eDP-1

cursor-256x256-rapid-movement on pipe A, connector eDP-1: PASSED

Beginning cursor-256x256-rapid-movement on pipe A, connector HDMI-A-1

cursor-256x256-rapid-movement on pipe A, connector HDMI-A-1: PASSED

Beginning cursor-256x256-rapid-movement on pipe B, connector eDP-1

cursor-256x256-rapid-movement on pipe B, connector eDP-1: PASSED

Beginning cursor-256x256-rapid-movement on pipe B, connector HDMI-A-1

cursor-256x256-rapid-movement on pipe B, connector HDMI-A-1: PASSED

Beginning cursor-256x256-rapid-movement on pipe C, connector eDP-1

cursor-256x256-rapid-movement on pipe C, connector eDP-1: PASSED

Beginning cursor-256x256-rapid-movement on pipe C, connector HDMI-A-1

cursor-256x256-rapid-movement on pipe C, connector HDMI-A-1: PASSED

Subtest cursor-256x256-rapid-movement: SUCCESS (4.677s)

-------------

kms_cursor_crc:18385) igt-debugfs-WARNING: Warning on condition crc->crc[i] == 0xffffffff in function crc_sanity_checks, file igt_debugfs.c:833 (kms_cursor_crc:18385) igt-debugfs-WARNING: Suspicious CRC: it looks like the CRC read back was from a register in a powered down well