diff options
| author | Vaibhav Gupta | 2021-01-12 13:39:23 +0530 |
|---|---|---|
| committer | Bjorn Helgaas | 2021-12-14 11:26:03 -0600 |
| commit | 6d1adc3d46a785cdb3cb0352ec9ad6fee5bb892b (patch) | |
| tree | 5be0263dbc4c31a13bca3c0fbb7177f860c6eb6b /drivers/char | |
| parent | ec4e4a6fdc51f11eaa7a919e3e2a5f5a65532a6c (diff) | |
sis-agp: convert to generic power management
Convert sis-agp from legacy PCI power management to the generic power
management framework.
Previously, sis-agp used legacy PCI power management, and agp_sis_suspend()
and agp_sis_resume() were responsible for both device-specific things and
generic PCI things:
agp_sis_suspend
pci_save_state(pdev) <-- generic PCI
pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI
agp_sis_resume
pci_set_power_state(pdev, PCI_D0) <-- generic PCI
pci_restore_state(pdev) <-- generic PCI
sis_driver.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_sis_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_sis_resume # dev->driver->pm->resume
sis_driver.configure() <-- device-specific
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20211208193305.147072-3-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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/sis-agp.c | 25 |
1 files changed, 6 insertions, 19 deletions
diff --git a/drivers/char/agp/sis-agp.c b/drivers/char/agp/sis-agp.c index 14909fc5d767..f8a02f4bef1b 100644 --- a/drivers/char/agp/sis-agp.c +++ b/drivers/char/agp/sis-agp.c @@ -217,26 +217,14 @@ static void agp_sis_remove(struct pci_dev *pdev) agp_put_bridge(bridge); } -#ifdef CONFIG_PM +#define agp_sis_suspend NULL -static int agp_sis_suspend(struct pci_dev *pdev, pm_message_t state) +static int __maybe_unused agp_sis_resume( + __attribute__((unused)) struct device *dev) { - pci_save_state(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; -} - -static int agp_sis_resume(struct pci_dev *pdev) -{ - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - return sis_driver.configure(); } -#endif /* CONFIG_PM */ - static const struct pci_device_id agp_sis_pci_table[] = { { .class = (PCI_CLASS_BRIDGE_HOST << 8), @@ -419,15 +407,14 @@ static const struct pci_device_id agp_sis_pci_table[] = { MODULE_DEVICE_TABLE(pci, agp_sis_pci_table); +static SIMPLE_DEV_PM_OPS(agp_sis_pm_ops, agp_sis_suspend, agp_sis_resume); + static struct pci_driver agp_sis_pci_driver = { .name = "agpgart-sis", .id_table = agp_sis_pci_table, .probe = agp_sis_probe, .remove = agp_sis_remove, -#ifdef CONFIG_PM - .suspend = agp_sis_suspend, - .resume = agp_sis_resume, -#endif + .driver.pm = &agp_sis_pm_ops, }; static int __init agp_sis_init(void) |