From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
driver/pci does the pci_save_state()+pci_set_power_state() from the
_noirq() pm hooks. Move our manual calls (needed for the hibernate+D3
workaround with buggy BIOSes) towards that same point. We currently
have no _noirq() hooks, so end of _late() hooks is the best we can
do right now.
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: linux-pci@xxxxxxxxxxxxxxx
Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_driver.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 6dc0104a3e36..9d557ff8adf5 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -1015,7 +1015,6 @@ static int i915_drm_suspend(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_display *display = &dev_priv->display;
- struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
pci_power_t opregion_target_state;
disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
@@ -1029,8 +1028,6 @@ static int i915_drm_suspend(struct drm_device *dev)
intel_display_driver_disable_user_access(dev_priv);
}
- pci_save_state(pdev);
-
intel_display_driver_suspend(dev_priv);
intel_dp_mst_suspend(dev_priv);
@@ -1090,10 +1087,16 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
drm_err(&dev_priv->drm, "Suspend complete failed: %d\n", ret);
intel_power_domains_resume(dev_priv);
- goto out;
+ goto fail;
}
+ enable_rpm_wakeref_asserts(rpm);
+
+ if (!dev_priv->uncore.user_forcewake_count)
+ intel_runtime_pm_driver_release(rpm);
+
pci_disable_device(pdev);
+
/*
* During hibernation on some platforms the BIOS may try to access
* the device even though it's already in D3 and hang the machine. So
@@ -1105,11 +1108,17 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
* Lenovo Thinkpad X301, X61s, X60, T60, X41
* Fujitsu FSC S7110
* Acer Aspire 1830T
+ *
+ * pci_save_state() is needed to prevent driver/pci from
+ * automagically putting the device into D3.
*/
+ pci_save_state(pdev);
if (!(hibernation && GRAPHICS_VER(dev_priv) < 6))
pci_set_power_state(pdev, PCI_D3hot);
-out:
+ return 0;
+
+fail:
enable_rpm_wakeref_asserts(rpm);
if (!dev_priv->uncore.user_forcewake_count)
intel_runtime_pm_driver_release(rpm);
--
2.44.2
