From: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx>
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)
Signed-off-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx>
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a573f5a..ff291c0 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -608,6 +608,9 @@ 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);
@@ -939,6 +942,21 @@ static int i915_pm_freeze(struct device *dev)
return i915_drm_freeze(drm_dev);
}
+static int i915_pm_freeze_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;
+
+ 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);
+
+ return 0;
+}
+
static int i915_pm_thaw_early(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
@@ -1476,6 +1494,7 @@ static const struct dev_pm_ops i915_pm_ops = {
.resume_early = i915_pm_resume_early,
.resume = i915_pm_resume,
.freeze = i915_pm_freeze,
+ .freeze_late = i915_pm_freeze_late,
.thaw_early = i915_pm_thaw_early,
.thaw = i915_pm_thaw,
.poweroff = i915_pm_poweroff,
--
1.9.1
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