[Bug 109671] New: HDCP compliance sub test cases failure due to hpd timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109671

            Bug ID: 109671
           Summary: HDCP compliance sub test cases failure due to hpd
                    timeout
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: khairul.anuar.romli at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 143404
  --> https://bugs.freedesktop.org/attachment.cgi?id=143404&action=edit
HDCP Log plus kernel log

-- system architecture: x86-64
-- kernel version: 5.0.0-rc6 from http://cgit.freedesktop.org/drm-tip 
-- Linux distribution: Ubuntu 18.04.1 LTS
-- Machine or mother board model: Intel Kaby Lake
-- Display connector: HDMI 
-- Test Device: SL-8800 HDCP Compliance Instrument

Two HDCP Compliance test cases failed when hdp_time is set to 100ms in SL-8800
Test Suite.

However, these two test cases passed when hpd_time is set to 3s.

On Leaf Hill Yocto, all hdcp compliance test cases are able to pass with
hpd_time 100ms. Yocto is still with kernel 4.14.

Attached is the compliance log with kernel log after enabling 0xe >
/sys/module/drm/parameters/debug.

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