[Bug 105911] DVI-D monitor connected to DVI-I output not detected (regression from kernel 4.14.32 to kernel 4.16.0 using graphic core)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105911

--- Comment #13 from tnmailinglists at gmail.com ---
I now booted with amdgpu.dc_log=1 and found the following in my log when DC is
on (I'm currently on 4.15.0.36):

[    1.479998] [drm] DC: create_links: connectors_num: physical:4, virtual:0
[    1.480001] [drm] Connector[0] description:signal 32
[    1.480029] [drm] Connector[1] description:signal 4
[    1.480031] [drm] dce110_link_encoder_construct: Failed to get
encoder_cap_info from VBIOS with error code 4!
[    1.480046] [drm] Connector[2] description:signal 2
[    1.480048] [drm] dce110_link_encoder_construct: Failed to get
encoder_cap_info from VBIOS with error code 4!
[    1.480064] [drm] Connector[3] description:signal 2
[    1.480066] [drm] dce110_link_encoder_construct: Failed to get
encoder_cap_info from VBIOS with error code 4!
[    1.492083] [drm] Display Core initialized
[    1.492091] [drm] Display Core initialized!
[    1.492427] [drm] link=0, dc_sink_in=          (null) is now Disconnected
[    1.492555] [drm] link=1, dc_sink_in=          (null) is now Disconnected
[    1.492683] [drm] link=2, dc_sink_in=          (null) is now Disconnected
[    1.505440] [drm] SADs count is: -2, don't need to read it
[    1.505453] [drm] [Detect]   [DDVI][ConnIdx:3] EDID goes here
[    1.505455] [drm] dc_link_detect: EDID decoded goes here
[    1.505456] [drm] link=3, dc_sink_in=        (ptrval) is now Connected

This does seem to show that connector 3 is incorrectly identified as dual link
DVI-D, or at least missing/not using the analogue part.

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