[Bug 106860] New: Intel Skull Canyon NUC6i7KYK with HDMI2.0 monitor doesn't find display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106860

            Bug ID: 106860
           Summary: Intel Skull Canyon NUC6i7KYK with HDMI2.0 monitor
                    doesn't find display
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: tomi.p.sarvela at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Intel Skull Canyon NUC6i7KYK connected to HDMI2.0 monitor doesn't seem to find
the display. The DP-to-HDMI2.0 LSPCon chip is Parade. More information about
the host can be found at

https://intel-gfx-ci.01.org/hardware/fi-skl-6770hq/

Peek at the /sys/kernel/debug/dri/0/i915_display_info shows the following
information:

- with HDMI1.4 monitor -

Connector info
--------------
connector 71: type DP-1, status: connected
        name:
        physical dimensions: 640x400mm
        subpixel order: Unknown
        CEA rev: 3
        DPCD rev: 12
        audio support: yes
        DP branch device present: yes
                Type: HDMI
                ID: 175IB0
                HW: 1.0
                SW: 7.32
                Max TMDS clock: 600000 kHz
                Max bpc: 12
        modes:
                id 97:"1920x1080" freq 60 clock 148500 hdisp 1920 hss 2008 hse
2052 htot 2200 vdisp 1080 vss 1084 vse 1089 vtot 1125 type 0x48 flags 0x5
                id 98:"3840x2160" freq 30 clock 297000 hdisp 3840 hss 4016 hse
4104 htot 4400 vdisp 2160 vss 2168 vse 2178 vtot 2250 type 0x40 flags 0x9

... down to the smallest resolutions.


- with HDMI2.0 monitor -

connector 71: type DP-1, status: disconnected
        DPCD rev: 12
        audio support: no
        DP branch device present: yes
                Type: HDMI
                ID: 175IB0
                HW: 1.0
                SW: 7.32
                Max bpc: 8
        modes:

... no modes.

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