It seems like we are attempting to use HDCP in tests that do not need content
protection:

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5128/shard-apl7/igt@kms_plane@plane-position-hole-dpms-pipe-b-planes.html

<7> [1747.235381] [drm:intel_hdcp_auth [i915]] KSV list failed to become ready
(-110)
<7> [1747.235601] [drm:_intel_hdcp_enable [i915]] HDCP Auth failure (-110)
<7> [1747.235754] [drm:_intel_hdcp_disable [i915]] [DP-1:100] HDCP is being
disabled...
<7> [1747.238782] [drm:_intel_hdcp_disable [i915]] HDCP is disabled

Please make sure HDCP is disabled in KMS tests which are not content-protection
related.