<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [ILK]igt/drv_suspend/sysfs-reader cause dmesg warn." href="https://bugs.freedesktop.org/show_bug.cgi?id=88911#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [ILK]igt/drv_suspend/sysfs-reader cause dmesg warn." href="https://bugs.freedesktop.org/show_bug.cgi?id=88911">bug 88911</a> from <a class="email" href="mailto:hengx.ding@intel.com" title="Ding Heng <hengx.ding@intel.com>"> Ding Heng</a> <pre>f9b3927afbb97649f5c89f0815820167b7c5cba8 is the first bad commit. commit f9b3927afbb97649f5c89f0815820167b7c5cba8 Author: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>> AuthorDate: Wed Jan 28 14:43:24 2015 +0200 Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> CommitDate: Fri Jan 30 17:15:31 2015 +0100 drm/i915: Do uncore early sanitize after domain init intel_uncore_early_sanitize() will reset the forcewake registers. When forcewake domains were introduced, the domain init was done after the sanitization of the forcewake registers. And as the resetting of registers use the domain accessors, we tried to reset the forcewake registers with unitialized forcewake domains and failed. Fix this by sanitizing after all the domains have been initialized. Do per domain clearing of forcewake register on domain init so that IVB can do early access to ECOBUS do determine the final configuration. This regression was introduced in commit 05a2fb157e44a53c79133805d30eaada43911941 Author: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>> Date: Mon Jan 19 16:20:43 2015 +0200 drm/i915: Consolidate forcewake code v2: Carve out ellc detect, fw_domain_reset for ivb/ecobus (Chris) Bugzilla: <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [VLV regression] MinnowBoard MAX DRM hang on linux-next 3.19-rc5 2015-01-26" href="show_bug.cgi?id=88805">https://bugs.freedesktop.org/show_bug.cgi?id=88805</a> Cc: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Reported-by: Olof Johansson <<a href="mailto:olof@lixom.net">olof@lixom.net</a>> Tested-by: Darren Hart <<a href="mailto:dvhart@linux.intel.com">dvhart@linux.intel.com</a>> (v1) Signed-off-by: Mika Kuoppala <<a href="mailto:mika.kuoppala@intel.com">mika.kuoppala@intel.com</a>> Reviewed-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>></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> <li>You are the assignee for the bug.</li> </ul> </body> </html>