[Bug 101518] [BAT][SKL] WARNING: no modes for connector 48 when running igt at kms_setmode@basic-clone-single-crtc

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101518

--- Comment #1 from Maarten Lankhorst <bugs at mblankhorst.nl> ---
Connector 48 from the logs is eDP-1.

What's interesting is that I see this:
[  392.746337] [drm:drm_mode_prune_invalid] Not using 1920x1080 mode:
CLOCK_HIGH

Some more debugging from dmesg..

[  382.469405] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:48:eDP-1]
[  382.469523] [drm:intel_dp_detect [i915]] [CONNECTOR:48:eDP-1]
[  382.469656] [drm:intel_power_well_enable [i915]] enabling DC off
[  382.469777] [drm:gen9_set_dc_state [i915]] Setting DC state from 02 to 00
[  382.469871] [drm:intel_dp_detect [i915]] Display Port TPS3 support: source
yes, sink yes
[  382.469947] [drm:intel_dp_print_rates [i915]] source rates: 162000, 216000,
270000, 324000, 432000, 540000
[  382.470015] [drm:intel_dp_print_rates [i915]] sink rates: 162000, 270000
[  382.470081] [drm:intel_dp_print_rates [i915]] common rates: 162000, 270000
[  382.470249] [drm:edp_panel_vdd_on [i915]] Turning eDP port A VDD on
[  382.470501] [drm:edp_panel_vdd_on [i915]] PP_STATUS: 0x80000008 PP_CONTROL:
0x0000000f
[  382.471733] [drm:drm_dp_read_desc] DP sink: OUI 00-22-b9 dev-ID sivarT
HW-rev 0.0 SW-rev 0.0 quirks 0x0000
[  382.472916] [drm:drm_edid_to_eld] ELD: no CEA Extension found
[  382.472944] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:48:eDP-1] probed modes :
[  382.472970] [drm:drm_mode_debug_printmodeline] Modeline 49:"1920x1080" 60
138700 1920 1968 2000 2080 1080 1083 1088 1111 0x48 0x9

Ok, looks good.

Now getting weird HPD and tons of dp_aux_ch timeouts..

But what I also noticed..

$ grep ERROR dmesg-during.log 
[  385.088911] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[  390.392461] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[  391.236144] [drm:intel_dp_check_link_status [i915]] *ERROR* Failed to get
link status
[  407.184193] [drm:intel_dp_check_link_status [i915]] *ERROR* Failed to get
link status
[  417.936164] [drm:intel_dp_check_link_status [i915]] *ERROR* Failed to get
link status
[  420.311740] [drm:intel_dp_check_link_status [i915]] *ERROR* Failed to get
link status

So I guess we fail with warn, without adding the dmesg error?

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