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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][SKL] *ERROR* failed to enable link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101144#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][SKL] *ERROR* failed to enable link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101144">bug 101144</a>
from <span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=131945" name="attach_131945" title="dmesg for Mansis test patch">attachment 131945</a> <a href="attachment.cgi?id=131945&action=edit" title="dmesg for Mansis test patch">[details]</a></span>
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</pre>
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