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drm/i915: leave rc6 enabled at suspend time v4 

This allows the system to enter the lowest power mode during system freeze.

v2: delete force wake timer at suspend (Imre)
v3: add GT work suspend function (Imre)
v4: use uncore forcewake reset (Daniel)

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2014-06-12 08:35:45 -07:00 committed by Daniel Vetter
parent 85e9067933
commit 156c7ca081
5 changed files with 25 additions and 3 deletions
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4
drivers/gpu/drm/i915/i915_drv.c
View File

@ -529,7 +529,7 @@ static int i915_drm_freeze(struct drm_device *dev)
drm_irq_uninstall(dev);
dev_priv->enable_hotplug_processing = false;
intel_disable_gt_powersave(dev);
intel_suspend_gt_powersave(dev);
/*
* Disable CRTCs directly since we want to preserve sw state
@ -548,8 +548,8 @@ static int i915_drm_freeze(struct drm_device *dev)
i915_save_state(dev);
intel_uncore_forcewake_reset(dev, false);
intel_opregion_fini(dev);
intel_uncore_fini(dev);
console_lock();
intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -2085,6 +2085,7 @@ extern void intel_uncore_early_sanitize(struct drm_device *dev);
extern void intel_uncore_init(struct drm_device *dev);
extern void intel_uncore_check_errors(struct drm_device *dev);
extern void intel_uncore_fini(struct drm_device *dev);
extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
void
i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -961,6 +961,7 @@ void intel_init_gt_powersave(struct drm_device *dev);
void intel_cleanup_gt_powersave(struct drm_device *dev);
void intel_enable_gt_powersave(struct drm_device *dev);
void intel_disable_gt_powersave(struct drm_device *dev);
void intel_suspend_gt_powersave(struct drm_device *dev);
void intel_reset_gt_powersave(struct drm_device *dev);
void ironlake_teardown_rc6(struct drm_device *dev);
void gen6_update_ring_freq(struct drm_device *dev);

20
drivers/gpu/drm/i915/intel_pm.c
View File

@ -4675,6 +4675,26 @@ void intel_cleanup_gt_powersave(struct drm_device *dev)
valleyview_cleanup_gt_powersave(dev);
}
/**
* intel_suspend_gt_powersave - suspend PM work and helper threads
* @dev: drm device
*
* We don't want to disable RC6 or other features here, we just want
* to make sure any work we've queued has finished and won't bother
* us while we're suspended.
*/
void intel_suspend_gt_powersave(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
/* Interrupts should be disabled already to avoid re-arming. */
WARN_ON(dev->irq_enabled);
flush_delayed_work(&dev_priv->rps.delayed_resume_work);
cancel_work_sync(&dev_priv->rps.work);
}
void intel_disable_gt_powersave(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

2
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -315,7 +315,7 @@ static void gen6_force_wake_timer(unsigned long arg)
intel_runtime_pm_put(dev_priv);
}
static void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
{
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long irqflags;