drm/i915: Fix crash while aborting hibernation
Commit cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915: implement
new pm ops for i915) introduced the problem that if s2disk hibernation
is aborted, the system will crash, because i915_pm_freeze() does
nothing, while it should at least reverse some operations carried out
by i915_suspend().
Fix this issue by splitting the i915 suspend into a freeze part a
suspend part, where the latter is not executed before creating a
hibernation image, and the i915 resume into a "low-level" resume part
and a thaw part, where the former is not executed after the image has
been created.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ecac882..79beffc 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -174,12 +174,42 @@
MODULE_DEVICE_TABLE(pci, pciidlist);
#endif
-static int i915_suspend(struct drm_device *dev, pm_message_t state)
+static int i915_drm_freeze(struct drm_device *dev)
+{
+ pci_save_state(dev->pdev);
+
+ /* If KMS is active, we do the leavevt stuff here */
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ int error = i915_gem_idle(dev);
+ if (error) {
+ dev_err(&dev->pdev->dev,
+ "GEM idle failed, resume might fail\n");
+ return error;
+ }
+ drm_irq_uninstall(dev);
+ }
+
+ i915_save_state(dev);
+
+ return 0;
+}
+
+static void i915_drm_suspend(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- if (!dev || !dev_priv) {
- DRM_ERROR("dev: %p, dev_priv: %p\n", dev, dev_priv);
+ intel_opregion_free(dev, 1);
+
+ /* Modeset on resume, not lid events */
+ dev_priv->modeset_on_lid = 0;
+}
+
+static int i915_suspend(struct drm_device *dev, pm_message_t state)
+{
+ int error;
+
+ if (!dev || !dev->dev_private) {
+ DRM_ERROR("dev: %p\n", dev);
DRM_ERROR("DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
@@ -187,19 +217,11 @@
if (state.event == PM_EVENT_PRETHAW)
return 0;
- pci_save_state(dev->pdev);
+ error = i915_drm_freeze(dev);
+ if (error)
+ return error;
- /* If KMS is active, we do the leavevt stuff here */
- if (drm_core_check_feature(dev, DRIVER_MODESET)) {
- if (i915_gem_idle(dev))
- dev_err(&dev->pdev->dev,
- "GEM idle failed, resume may fail\n");
- drm_irq_uninstall(dev);
- }
-
- i915_save_state(dev);
-
- intel_opregion_free(dev, 1);
+ i915_drm_suspend(dev);
if (state.event == PM_EVENT_SUSPEND) {
/* Shut down the device */
@@ -207,45 +229,45 @@
pci_set_power_state(dev->pdev, PCI_D3hot);
}
- /* Modeset on resume, not lid events */
- dev_priv->modeset_on_lid = 0;
-
return 0;
}
-static int i915_resume(struct drm_device *dev)
+static int i915_drm_thaw(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- int ret = 0;
-
- if (pci_enable_device(dev->pdev))
- return -1;
- pci_set_master(dev->pdev);
-
- i915_restore_state(dev);
-
- intel_opregion_init(dev, 1);
+ int error = 0;
/* KMS EnterVT equivalent */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
dev_priv->mm.suspended = 0;
- ret = i915_gem_init_ringbuffer(dev);
- if (ret != 0)
- ret = -1;
+ error = i915_gem_init_ringbuffer(dev);
mutex_unlock(&dev->struct_mutex);
drm_irq_install(dev);
- }
- if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+
/* Resume the modeset for every activated CRTC */
drm_helper_resume_force_mode(dev);
}
dev_priv->modeset_on_lid = 0;
- return ret;
+ return error;
+}
+
+static int i915_resume(struct drm_device *dev)
+{
+ if (pci_enable_device(dev->pdev))
+ return -EIO;
+
+ pci_set_master(dev->pdev);
+
+ i915_restore_state(dev);
+
+ intel_opregion_init(dev, 1);
+
+ return i915_drm_thaw(dev);
}
/**
@@ -386,57 +408,69 @@
drm_put_dev(dev);
}
-static int
-i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+static int i915_pm_suspend(struct device *dev)
{
- struct drm_device *dev = pci_get_drvdata(pdev);
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *drm_dev = pci_get_drvdata(pdev);
+ int error;
- return i915_suspend(dev, state);
-}
+ if (!drm_dev || !drm_dev->dev_private) {
+ dev_err(dev, "DRM not initialized, aborting suspend.\n");
+ return -ENODEV;
+ }
-static int
-i915_pci_resume(struct pci_dev *pdev)
-{
- struct drm_device *dev = pci_get_drvdata(pdev);
+ error = i915_drm_freeze(drm_dev);
+ if (error)
+ return error;
- return i915_resume(dev);
-}
+ i915_drm_suspend(drm_dev);
-static int
-i915_pm_suspend(struct device *dev)
-{
- return i915_pci_suspend(to_pci_dev(dev), PMSG_SUSPEND);
-}
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3hot);
-static int
-i915_pm_resume(struct device *dev)
-{
- return i915_pci_resume(to_pci_dev(dev));
-}
-
-static int
-i915_pm_freeze(struct device *dev)
-{
- return i915_pci_suspend(to_pci_dev(dev), PMSG_FREEZE);
-}
-
-static int
-i915_pm_thaw(struct device *dev)
-{
- /* thaw during hibernate, do nothing! */
return 0;
}
-static int
-i915_pm_poweroff(struct device *dev)
+static int i915_pm_resume(struct device *dev)
{
- return i915_pci_suspend(to_pci_dev(dev), PMSG_HIBERNATE);
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *drm_dev = pci_get_drvdata(pdev);
+
+ return i915_resume(drm_dev);
}
-static int
-i915_pm_restore(struct device *dev)
+static int i915_pm_freeze(struct device *dev)
{
- return i915_pci_resume(to_pci_dev(dev));
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *drm_dev = pci_get_drvdata(pdev);
+
+ if (!drm_dev || !drm_dev->dev_private) {
+ dev_err(dev, "DRM not initialized, aborting suspend.\n");
+ return -ENODEV;
+ }
+
+ return i915_drm_freeze(drm_dev);
+}
+
+static int i915_pm_thaw(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *drm_dev = pci_get_drvdata(pdev);
+
+ return i915_drm_thaw(drm_dev);
+}
+
+static int i915_pm_poweroff(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *drm_dev = pci_get_drvdata(pdev);
+ int error;
+
+ error = i915_drm_freeze(drm_dev);
+ if (!error)
+ i915_drm_suspend(drm_dev);
+
+ return error;
}
const struct dev_pm_ops i915_pm_ops = {
@@ -445,7 +479,7 @@
.freeze = i915_pm_freeze,
.thaw = i915_pm_thaw,
.poweroff = i915_pm_poweroff,
- .restore = i915_pm_restore,
+ .restore = i915_pm_resume,
};
static struct vm_operations_struct i915_gem_vm_ops = {
