[Bug 112072] DisplayPort over USB-Type C Connector Not Recognised on Intel NUC8i5BEK (Gen 9, CoffeeLake)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112072

--- Comment #4 from Geoffrey Allott <geoffrey at allott.email> ---
Needed to be root to read the debug info... here it is:

CRTC info
---------
CRTC 51: pipe: A, active=yes, (size=1024x768), dither=no, bpp=24
        fb: 118, pos: 0x0, size: 1024x768
        encoder 104: type: DDI C, connectors:
                connector 105: type: DP-2, status: connected, mode:
                "1024x768": 60 65000 1024 1048 1184 1344 768 771 777 806 0x40
0xa
        cursor visible? no, position (0, 0), size 0x0, addr 0x00000000
        num_scalers=2, scaler_users=0 scaler_id=-1, scalers[0]: use=no,
mode=10000000, scalers[1]: use=no, mode=0
        --Plane id 31: type=PRI, crtc_pos=   0x   0, crtc_size=1024x 768,
src_pos=0.0000x0.0000, src_size=1024.0000x768.0000, format=XR24 little-endian
(0x34325258), rotation=0 (0x00000001)
        --Plane id 39: type=OVL, crtc_pos=   0x   0, crtc_size=   0x   0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
        --Plane id 47: type=CUR, crtc_pos=   0x   0, crtc_size=   0x   0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
        underrun reporting: cpu=yes pch=yes 
CRTC 72: pipe: B, active=no, (size=0x0), dither=no, bpp=0
        underrun reporting: cpu=yes pch=yes 
CRTC 93: pipe: C, active=no, (size=0x0), dither=no, bpp=0
        underrun reporting: cpu=yes pch=yes 

Connector info
--------------
connector 95: type DP-1, status: disconnected
connector 105: type DP-2, status: connected
        physical dimensions: 0x0mm
        subpixel order: Unknown
        CEA rev: 0
        DPCD rev: 12
        audio support: no
        DP branch device present: no
        HDCP version: HDCP1.4 
        modes:
                "1024x768": 60 65000 1024 1048 1184 1344 768 771 777 806 0x40
0xa
                "800x600": 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
                "800x600": 56 36000 800 824 896 1024 600 601 603 625 0x40 0x5
                "848x480": 60 33750 848 864 976 1088 480 486 494 517 0x40 0x5
                "640x480": 60 25175 640 656 752 800 480 490 492 525 0x40 0xa
connector 111: type HDMI-A-1, status: disconnected

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