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drm/i915: make sure PC8 is enabled on suspend and disabled on resume v4 

This matches the runtime suspend paths and allows the system to enter
the lowest power mode at freeze time.

v2: move disable_pc8 call to thaw_early (Imre)
    move enable_pc8 to freeze_late (Imre/Jesse)
v3: drop spurious hunk from _freeze now that we have freeze_late (Jesse)
v4: move back to suspend_late (Imre was right)

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:
Kristen Carlson Accardi 2014-06-12 08:35:48 -07:00 committed by Daniel Vetter
parent e5747e3adc
commit 8abdc17941
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/i915/i915_drv.c
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@ -616,6 +616,9 @@ static int i915_drm_thaw_early(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (IS_HASWELL(dev) || IS_BROADWELL(dev))
hsw_disable_pc8(dev_priv);
intel_uncore_early_sanitize(dev);
intel_uncore_sanitize(dev);
intel_power_domains_init_hw(dev_priv);
@ -899,6 +902,7 @@ static int i915_pm_suspend_late(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = drm_dev->dev_private;
/*
* We have a suspedn ordering issue with the snd-hda driver also
@ -912,6 +916,9 @@ static int i915_pm_suspend_late(struct device *dev)
if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
if (IS_HASWELL(drm_dev) || IS_BROADWELL(drm_dev))
hsw_enable_pc8(dev_priv);
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);