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| author | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2015-12-09 15:56:13 +0200 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2015-12-10 11:28:05 +0200 |
| commit | 825f272895b9ec9151399b4102739c899b0b6392 (patch) | |
| tree | b4cff12e4458bd3368361498160dd7af7692ac02 /drivers | |
| parent | 3d52ccf52f2c51f613e42e65be0f06e4e6788093 (diff) | |
| download | talos-op-linux-825f272895b9ec9151399b4102739c899b0b6392.tar.gz talos-op-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')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index e6935f1cb689..81862d5246d6 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1462,6 +1462,8 @@ static int intel_runtime_suspend(struct device *device) i915_gem_release_all_mmaps(dev_priv); mutex_unlock(&dev->struct_mutex); + cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); + intel_guc_suspend(dev); intel_suspend_gt_powersave(dev); @@ -1475,7 +1477,6 @@ static int intel_runtime_suspend(struct device *device) return ret; } - cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); intel_uncore_forcewake_reset(dev, false); dev_priv->pm.suspended = true; |
