Hard hang observed with eDP and HDMI displays
Reported by
nathan.d...@intel.com,
Dec 4 2017
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Issue descriptionUserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36 Platform: CNL Steps to reproduce the problem: From upstream fd.o bug https://bugs.freedesktop.org/show_bug.cgi?id=103997: Running igt/testdisplay test results in a hard hang. eDP - ok DP - ok HDMI - ok eDP + DP - ok eDP + HDMI - fail DP + HDMI - fail eDP + DP + HDMI - fail What is the expected behavior? No hang on following combinations of displays: eDP + HDMI - fail DP + HDMI - fail eDP + DP + HDMI - fail What went wrong? Running igt/testdisplay test results in a hard hang Did this work before? N/A Chrome version: 62.0.3202.94 Channel: dev OS Version: Flash Version: Fixed in drm-intel-next-queued and will be backported to chromeos-4.12 and chromeos-4.14 kernels.
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Jan 12 2018
The following revision refers to this bug: https://chromium.googlesource.com/chromiumos/third_party/kernel/+/9c379e931127bfed3d086968828e32f3b399627a commit 9c379e931127bfed3d086968828e32f3b399627a Author: James Ausmus <james.ausmus@intel.com> Date: Fri Jan 12 06:22:26 2018 FROMGIT: drm/i915/cnl: Mask previous DDI - PLL mapping Without masking out the old value, we can end up pointing the DDI to a disabled PLL, which makes the system fall over. Mask out the previous value before setting the PLL to DDI mapping. This can be observed by running igt/testdisplay with both an eDP and HDMI/DP output active. v2: Add the Bugzilla link Fixes: 555e38d273172 ("drm/i915/cnl: DDI - PLL mapping") Testcase: igt/testdisplay Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103997 Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Matt Atwood <matthew.s.atwood@intel.com> Signed-off-by: James Ausmus <james.ausmus@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Tested-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171201021700.13504-1-james.ausmus@intel.com (cherry picked from commit 23a7068ec581fcc6fb61039448632d25987b1fae git://anongit.freedesktop.org/drm-intel drm-intel-next-queued) BUG= chromium:791664 , chromium:783394 TEST=CNL boots to graphics Change-Id: I30dfcec133088ac45d79e07b56d64bbc83fc9647 Signed-off-by: Nathan Ciobanu <nathan.d.ciobanu@intel.com> Reviewed-on: https://chromium-review.googlesource.com/806446 Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com> Tested-by: Casey G Bowman <casey.g.bowman@intel.com> Reviewed-by: Stéphane Marchesin <marcheu@chromium.org> [modify] https://crrev.com/9c379e931127bfed3d086968828e32f3b399627a/drivers/gpu/drm/i915/intel_ddi.c
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Jan 14
Issue has not been modified or commented on in the last 365 days, please re-open or file a new bug if this is still an issue. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot |
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Comment 1 by dtapu...@chromium.org
, Jan 2 2018