diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-23 21:59:43 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-23 21:59:43 +0400 |
| commit | 35e7f73c32ad44a931d918d04e317a7fb0c63e6e (patch) | |
| tree | e3cb8c89c8230aaa45a0f1b101decdc3b9831938 /drivers/pci/pci-acpi.c | |
| parent | e5028b52e46eb1379d78d136bd0890705f331183 (diff) | |
| parent | 448bd857d48e69b33ef323739dc6d8ca20d4cda7 (diff) | |
| download | linux-35e7f73c32ad44a931d918d04e317a7fb0c63e6e.tar.xz | |
Merge branch 'topic/huang-d3cold-v7' into next
* topic/huang-d3cold-v7:
PCI/PM: add PCIe runtime D3cold support
PCI: do not call pci_set_power_state with PCI_D3cold
PCI/PM: add runtime PM support to PCIe port
ACPI/PM: specify lowest allowed state for device sleep state
Diffstat (limited to 'drivers/pci/pci-acpi.c')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 87f4c504eafb..fbf7b26c7c8a 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -48,6 +48,12 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context) if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev) return; + if (pci_dev->current_state == PCI_D3cold) { + pci_wakeup_event(pci_dev); + pm_runtime_resume(&pci_dev->dev); + return; + } + if (!pci_dev->pm_cap || !pci_dev->pme_support || pci_check_pme_status(pci_dev)) { if (pci_dev->pme_poll) @@ -201,9 +207,13 @@ phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) { - int acpi_state; + int acpi_state, d_max; - acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL); + if (pdev->no_d3cold) + d_max = ACPI_STATE_D3_HOT; + else + d_max = ACPI_STATE_D3_COLD; + acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max); if (acpi_state < 0) return PCI_POWER_ERROR; @@ -310,7 +320,13 @@ static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable) static int acpi_pci_run_wake(struct pci_dev *dev, bool enable) { - if (dev->pme_interrupt) + /* + * Per PCI Express Base Specification Revision 2.0 section + * 5.3.3.2 Link Wakeup, platform support is needed for D3cold + * waking up to power on the main link even if there is PME + * support for D3cold + */ + if (dev->pme_interrupt && !dev->runtime_d3cold) return 0; if (!acpi_pm_device_run_wake(&dev->dev, enable)) |