[Bug 83600] [HSW] HDMI monitor does not work via active DisplayPort adapter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83600

--- Comment #22 from Chris Cheney <chris.cheney at gmail.com> ---
Going through the dmesg with an untrained eye it looks like it sets up the DP
fine and then tears it down about .1s later.

See:

[    2.125767] [drm:intel_crtc_set_config] [CRTC:28] [FB:103] #connectors=1 (x
y) (0 0)
[    2.125768] [drm:intel_set_config_compute_mode_changes] inactive crtc, full
mode set
[    2.125768] [drm:intel_set_config_compute_mode_changes] modes are different,
full mode set
[    2.125770] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0
0 0 0x0 0x0
[    2.125771] [drm:drm_mode_debug_printmodeline] Modeline 102:"1920x1080" 60
148500 1920 2008 2052 2200 1080 1084 1089 1125 0x48 0x5
[    2.125771] [drm:intel_set_config_compute_mode_changes] computed changes for
[CRTC:28], mode_changed=1, fb_changed=0
[    2.125772] [drm:intel_modeset_stage_output_state] [CONNECTOR:40:DP-1]
encoder changed, full mode switch
[    2.125774] [drm:intel_modeset_stage_output_state] [CONNECTOR:33:HDMI-A-1]
to [CRTC:20]
[    2.125775] [drm:intel_modeset_stage_output_state] [CONNECTOR:38:HDMI-A-2]
to [CRTC:24]
[    2.125776] [drm:intel_modeset_stage_output_state] [CONNECTOR:40:DP-1] to
[CRTC:28]
[    2.125776] [drm:intel_modeset_stage_output_state] [ENCODER:39:TMDS-39] crtc
changed, full mode switch
[    2.125778] [drm:intel_modeset_stage_output_state] [CRTC:28] enabled, full
mode switch
[    2.125779] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset:
4, prepare: 4, disable: 0
[    2.125781] [drm:connected_sink_compute_bpp] [CONNECTOR:40:DP-1] checking
for sink bpp constrains
[    2.125783] [drm:intel_dp_compute_config] DP link computation with max lane
count 2 max bw 270000 pixel clock 148500KHz
[    2.125785] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock
270000 bpp 24
[    2.125785] [drm:intel_dp_compute_config] DP link bw required 356400
available 432000
[    2.125786] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24,
dithering: 0
[    2.125786] [drm:intel_dump_pipe_config] [CRTC:28][modeset] config for pipe
C
[    2.125787] [drm:intel_dump_pipe_config] cpu_transcoder: C
[    2.125787] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
[    2.125788] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0,
gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[    2.125788] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 6920601, gmch_n:
8388608, link_m: 288358, link_n: 524288, tu: 64
[    2.125789] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0,
link_m2: 0, link_n2: 0, tu2: 0
[    2.125789] [drm:intel_dump_pipe_config] audio: 1, infoframes: 0
[    2.125790] [drm:intel_dump_pipe_config] requested mode:
[    2.125790] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60
148500 1920 2008 2052 2200 1080 1084 1089 1125 0x48 0x5
[    2.125791] [drm:intel_dump_pipe_config] adjusted mode:
[    2.125792] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60
148500 1920 2008 2052 2200 1080 1084 1089 1125 0x48 0x5
[    2.125792] [drm:intel_dump_crtc_timings] crtc timings: 148500 1920 2008
2052 2200 1080 1084 1089 1125, type: 0x48 flags: 0x5
[    2.125793] [drm:intel_dump_pipe_config] port clock: 270000
[    2.125793] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
[    2.125793] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000,
ratios: 0x00000000, lvds border: 0x00000000
[    2.125794] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size:
0x00000000, disabled
[    2.125794] [drm:intel_dump_pipe_config] ips: 0
[    2.125794] [drm:intel_dump_pipe_config] double wide: 0
[    2.127528] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[    2.128753] [drm:intel_dp_start_link_train] clock recovery OK
[    2.130292] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[    2.133852] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training
successful
[    2.134390] [drm:intel_audio_codec_enable] ELD on [CONNECTOR:40:DP-1],
[ENCODER:39:TMDS-39]
[    2.134391] [drm:hsw_audio_codec_enable] Enable audio codec on pipe C, 32
bytes ELD



Then:

[    2.215356] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:40:DP-1]
[    2.215359] [drm:intel_dp_detect] [CONNECTOR:40:DP-1]
[    2.215363] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:40:DP-1] status updated from 1 to 2
[    2.215366] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:40:DP-1] disconnected

...

[    2.215568] [drm:drm_enable_connectors] connector 40 enabled? no

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