Commit 84b79f8d authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Eric Anholt

drm/i915: Fix crash while aborting hibernation

Commit cbda12d7 (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: default avatarRafael J. Wysocki <rjw@sisk.pl>
Tested-by: default avatarAlan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent a40e8d31
......@@ -174,78 +174,100 @@ const static struct pci_device_id pciidlist[] = {
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)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (!dev || !dev_priv) {
DRM_ERROR("dev: %p, dev_priv: %p\n", dev, dev_priv);
DRM_ERROR("DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (state.event == PM_EVENT_PRETHAW)
return 0;
pci_save_state(dev->pdev);
/* If KMS is active, we do the leavevt stuff here */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
if (i915_gem_idle(dev))
int error = i915_gem_idle(dev);
if (error) {
dev_err(&dev->pdev->dev,
"GEM idle failed, resume may fail\n");
"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;
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;
}
if (state.event == PM_EVENT_PRETHAW)
return 0;
error = i915_drm_freeze(dev);
if (error)
return error;
i915_drm_suspend(dev);
if (state.event == PM_EVENT_SUSPEND) {
/* Shut down the device */
pci_disable_device(dev->pdev);
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 @@ i915_pci_remove(struct pci_dev *pdev)
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));
return 0;
}
static int
i915_pm_freeze(struct device *dev)
static int i915_pm_resume(struct device *dev)
{
return i915_pci_suspend(to_pci_dev(dev), PMSG_FREEZE);
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_thaw(struct device *dev)
static int i915_pm_freeze(struct device *dev)
{
/* thaw during hibernate, do nothing! */
return 0;
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_poweroff(struct device *dev)
static int i915_pm_thaw(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_drm_thaw(drm_dev);
}
static int
i915_pm_restore(struct device *dev)
static int i915_pm_poweroff(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);
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 @@ const struct dev_pm_ops i915_pm_ops = {
.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 = {
......
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