<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <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#c23">Comment # 23</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 <a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> Marta Löfstedt</a> <pre>(In reply to Manasi from <a href="show_bug.cgi?id=101144#c22">comment #22</a>) > (In reply to Jani Nikula from <a href="show_bug.cgi?id=101144#c17">comment #17</a>) > > (In reply to Manasi from <a href="show_bug.cgi?id=101144#c14">comment #14</a>) > > > I am trying to find out at what point can we first check for dp aux > > > transactions and wait longer to try again? > > > > Can you explain how we'd end up in link training if native aux was failing > > altogether? It must have worked for some time before link training, right? > > > > Ville's explanation would cover this as well. > > Actually it fails inside the function > intel_dp_link_training_clock_reciovery() when it tries to write the TP1 and > errors out saying "Failed to enable link training". > Yes but it worked fine for DPCD reads over AUX, so that's why I am confused > as to where we need to add the delay for the AUX reads? > > Also, shouldn't the spec for that specific panel or the eDP spec talk about > how much delay should be given for the AUX read/writes? > Any thoughts on double checking this in the spec? > > Manasi Manasi, I believe that one theory is that device have actually become broken/unstable and that we should try to prove this somehow. If you or Ville has some ideas on how to prove/disprove this, could you try this on the try-bot, or provide a patch that I can run on the machine early in the morning when the CI is usually idle.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>