diff options
author | Imre Deak <imre.deak@intel.com> | 2014-04-22 20:21:07 +0300 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-05-05 09:09:10 +0200 |
commit | 9486db611ca69ea67b6f4285fbb8afeb34585571 (patch) | |
tree | 12cb736abd1c93e062b5b6796fec5501c6c50972 /drivers/gpu/drm/i915/i915_drv.c | |
parent | 92b806d3684f2c7009554aaf587531a6a861af39 (diff) | |
download | op-kernel-dev-9486db611ca69ea67b6f4285fbb8afeb34585571.zip op-kernel-dev-9486db611ca69ea67b6f4285fbb8afeb34585571.tar.gz |
drm/i915: reinit GT power save during resume
During runtime suspend there can be a last pending rps.work, so make
sure it's canceled. Note that in the runtime suspend callback we can't
get any RPS interrupts since it's called only after the GPU goes idle
and we set the minimum RPS frequency. The next possibility for an RPS
interrupt is only after getting an RPM ref (for example because of a new
GPU command) and calling the RPM resume callback.
v2:
- patch introduced in v2 of the patchset
v3:
- Change the order of canceling the rps.work and disabling interrupts to
avoid the race between interrupt disabling and the the rps.work. Race
spotted by Ville.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 114598d..e3c9c44 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -947,6 +947,12 @@ static int intel_runtime_suspend(struct device *device) DRM_DEBUG_KMS("Suspending device\n"); + /* + * rps.work can't be rearmed here, since we get here only after making + * sure the GPU is idle and the RPS freq is set to the minimum. See + * intel_mark_idle(). + */ + cancel_work_sync(&dev_priv->rps.work); intel_runtime_pm_disable_interrupts(dev); if (IS_GEN6(dev)) @@ -998,6 +1004,7 @@ static int intel_runtime_resume(struct device *device) gen6_update_ring_freq(dev); intel_runtime_pm_restore_interrupts(dev); + intel_reset_gt_powersave(dev); DRM_DEBUG_KMS("Device resumed\n"); return 0; |