[Bug 101144] [BAT][SKL] *ERROR* failed to enable link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101144

--- Comment #27 from Marta Löfstedt <marta.lofstedt at intel.com> ---
Created attachment 131945
  --> https://bugs.freedesktop.org/attachment.cgi?id=131945&action=edit
dmesg for Mansis test patch

Manasi, here is dmesg with you testpatch.

igt test started:
[   89.255054] [IGT] kms_flip: executing

subtest started:
[   89.273659] [IGT] kms_flip: starting subtest basic-flip-vs-dpms

first everything looks fine:
"[   89.575307] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 -
cnt: 0
...
[   90.345461] [drm:intel_ddi_pre_enable] Manasi Debug [CONNECTOR:48:eDP-1]
status connected 
[   90.345763] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0x0000000b
[   90.346891] [drm:intel_dp_set_signal_levels] Using signal levels 00000000"

This HPD also goes fine:
[   91.624826] [drm:intel_hpd_irq_handler] digital hpd port A - long
[   91.689787] [drm:intel_ddi_pre_enable] Manasi Debug [CONNECTOR:48:eDP-1]
status connected 

Then we run into the usual issue, i.e. double HPDs:
"[   92.925623] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 -
cnt: 1
...
[   92.961714] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 -
cnt: 2
...
[   92.990129] [drm:intel_ddi_pre_enable] Manasi Debug [CONNECTOR:48:eDP-1]" 

Then the usual aux timeouts:
"[   92.990367] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
[   92.990414] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0x0000000b
[   92.998844] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7c1003ff"

and then:
[   94.616008] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training

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