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Merge branch 'pci/pm' 

- Leave Apple Thunderbolt controllers on for s2idle or standby so they work
  after resume (Konstantin Kharlamov)

* pci/pm:
  PCI: Leave Apple Thunderbolt controllers on for s2idle or standby
This commit is contained in:
Bjorn Helgaas 2021-07-06 10:56:24 -05:00
parent c9fb9042c9 4694ae373d
commit e92605b0a0
1 changed files with 11 additions and 0 deletions
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11
drivers/pci/quirks.c
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@ -27,6 +27,7 @@
#include <linux/nvme.h> #include <linux/nvme.h>
#include <linux/platform_data/x86/apple.h> #include <linux/platform_data/x86/apple.h>
#include <linux/pm_runtime.h> #include <linux/pm_runtime.h>
#include <linux/suspend.h>
#include <linux/switchtec.h> #include <linux/switchtec.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */ #include <asm/dma.h> /* isa_dma_bridge_buggy */
#include "pci.h" #include "pci.h"
@ -3634,6 +3635,16 @@ static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev)
return; return;
if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM)
return; return;
/*
* SXIO/SXFP/SXLF turns off power to the Thunderbolt controller.
* We don't know how to turn it back on again, but firmware does,
* so we can only use SXIO/SXFP/SXLF if we're suspending via
* firmware.
*/
if (!pm_suspend_via_firmware())
return;
bridge = ACPI_HANDLE(&dev->dev); bridge = ACPI_HANDLE(&dev->dev);
if (!bridge) if (!bridge)
return; return;