Convert via-agp from legacy PCI power management to the generic power
management framework.
Previously, via-agp used legacy PCI power management, and agp_via_suspend()
and agp_via_resume() were responsible for both device-specific things and
generic PCI things:
agp_via_suspend
pci_save_state(pdev) <-- generic PCI
pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI
agp_via_resume
pci_set_power_state(pdev, PCI_D0) <-- generic PCI
pci_restore_state(pdev) <-- generic PCI
via_configure_agp3() <-- device-specific
via_configure() <-- device-specific
With generic power management, the PCI bus PM methods do the generic PCI
things, and the driver needs only the device-specific part, i.e.,
suspend_devices_and_enter
dpm_suspend_start(PMSG_SUSPEND)
pci_pm_suspend # PCI bus .suspend() method
agp_via_suspend <-- not needed at all; removed
suspend_enter
dpm_suspend_noirq(PMSG_SUSPEND)
pci_pm_suspend_noirq # PCI bus .suspend_noirq() method
pci_save_state <-- generic PCI
pci_prepare_to_sleep <-- generic PCI
pci_set_power_state
...
dpm_resume_end(PMSG_RESUME)
pci_pm_resume # PCI bus .resume() method
pci_restore_standard_config
pci_set_power_state(PCI_D0) <-- generic PCI
pci_restore_state <-- generic PCI
agp_via_resume # dev->driver->pm->resume
via_configure_agp3() <-- device-specific
via_configure() <-- device-specific
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20211208193305.147072-4-helgaas@kernel.org
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Dave Airlie <airlied@redhat.com>
agp_put_bridge(bridge);
}
-#ifdef CONFIG_PM
+#define agp_via_suspend NULL
-static int agp_via_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused agp_via_resume(struct device *dev)
{
- pci_save_state (pdev);
- pci_set_power_state (pdev, PCI_D3hot);
-
- return 0;
-}
-
-static int agp_via_resume(struct pci_dev *pdev)
-{
- struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
-
- pci_set_power_state (pdev, PCI_D0);
- pci_restore_state(pdev);
+ struct agp_bridge_data *bridge = dev_get_drvdata(dev);
if (bridge->driver == &via_agp3_driver)
return via_configure_agp3();
return 0;
}
-#endif /* CONFIG_PM */
-
/* must be the same order as name table above */
static const struct pci_device_id agp_via_pci_table[] = {
#define ID(x) \
MODULE_DEVICE_TABLE(pci, agp_via_pci_table);
+static SIMPLE_DEV_PM_OPS(agp_via_pm_ops, agp_via_suspend, agp_via_resume);
static struct pci_driver agp_via_pci_driver = {
.name = "agpgart-via",
.id_table = agp_via_pci_table,
.probe = agp_via_probe,
.remove = agp_via_remove,
-#ifdef CONFIG_PM
- .suspend = agp_via_suspend,
- .resume = agp_via_resume,
-#endif
+ .driver.pm = &agp_via_pm_ops,
};