<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BYT Regression]igt/pm_rpm/debugfs-forcewake-user causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=81200#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BYT Regression]igt/pm_rpm/debugfs-forcewake-user causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=81200">bug 81200</a> from <a class="email" href="mailto:lei.a.liu@intel.com" title="liulei <lei.a.liu@intel.com>"> liulei</a> <pre>==Bisect results== ---------------------------- Bisect shows: 13cf550448b58abf8f44f5d6a560f2d20871c965 is the first bad commit commit 13cf550448b58abf8f44f5d6a560f2d20871c965 Author: Dave Airlie <<a href="mailto:airlied@redhat.com">airlied@redhat.com</a>> AuthorDate: Wed Jun 18 11:29:35 2014 +1000 Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> CommitDate: Mon Jul 7 15:08:51 2014 +0200 drm/i915: rework digital port IRQ handling (v2) The digital ports from Ironlake and up have the ability to distinguish between long and short HPD pulses. Displayport 1.1 only uses the short form to request link retraining usually, so we haven't really needed support for it until now. However with DP 1.2 MST we need to handle the short irqs on their own outside the modesetting locking the long hpd's involve. This patch adds the framework to distinguish between short/long to the current code base, to lay the basis for future DP 1.2 MST work. This should mean we get better bisectability in case of regression due to the new irq handling. v2: add GM45 support (untested, due to lack of hw)</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>