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| author | Joonas Lahtinen | 2015-12-09 14:56:13 +0100 |
|---|---|---|
| committer | Imre Deak | 2015-12-10 10:28:05 +0100 |
| commit | 825f272895b9ec9151399b4102739c899b0b6392 (patch) | |
| tree | b4cff12e4458bd3368361498160dd7af7692ac02 /drivers/gpu/drm/i915/i915_sysfs.c | |
| parent | drm/i915: start adding dp mst audio (diff) | |
| download | kernel-qcow2-linux-825f272895b9ec9151399b4102739c899b0b6392.tar.gz kernel-qcow2-linux-825f272895b9ec9151399b4102739c899b0b6392.tar.xz kernel-qcow2-linux-825f272895b9ec9151399b4102739c899b0b6392.zip | |
drm/i915: Cancel hangcheck before GPU is suspended
In order to avoid accessing GPU registers while GPU is suspended cancel
the hangcheck work before calling intel_suspend_complete which actually
puts the GPU to suspend. Otherwise hangcheck might do MMIO reads to a
suspended GPU.
Placement before intel_guc_suspend is imitated from i915_drm_suspend
which cancels the work at i915_gem_suspend, to keep the functions
similar.
On VLV systems, namely BYT, this was causing an error during runtime
suspend cycle:
[drm:vlv_check_no_gt_access [i915]] *ERROR* GT register access while GT waking disabled
Testcase: igt/pm_rpm/basic-rte
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93121
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1449669373-8588-1-git-send-email-joonas.lahtinen@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_sysfs.c')
0 files changed, 0 insertions, 0 deletions