linux/arch/x86/pci
Mario Limonciello 7d08f21f8c x86/PCI: Avoid PME from D3hot/D3cold for AMD Rembrandt and Phoenix USB4
Iain reports that USB devices can't be used to wake a Lenovo Z13 from
suspend.  This occurs because on some AMD platforms, even though the Root
Ports advertise PME_Support for D3hot and D3cold, wakeup events from
devices on a USB4 controller don't result in wakeup interrupts from the
Root Port when amd-pmc has put the platform in a hardware sleep state.

If amd-pmc will be involved in the suspend, remove D3hot and D3cold from
the PME_Support mask of Root Ports above USB4 controllers so we avoid those
states if we need wakeups.

Restore D3 support at resume so that it can be used by runtime suspend.

This affects both AMD Rembrandt and Phoenix SoCs.

"pm_suspend_target_state == PM_SUSPEND_ON" means we're doing runtime
suspend, and amd-pmc will not be involved.  In that case PMEs work as
advertised in D3hot/D3cold, so we don't need to do anything.

Note that amd-pmc is technically optional, and there's no need for this
quirk if it's not present, but we assume it's always present because power
consumption is so high without it.

Fixes: 9d26d3a8f1 ("PCI: Put PCIe ports into D3 during suspend")
Link: https://lore.kernel.org/r/20231004144959.158840-1-mario.limonciello@amd.com
Reported-by: Iain Lane <iain@orangesquash.org.uk>
Closes: https://forums.lenovo.com/t5/Ubuntu/Z13-can-t-resume-from-suspend-with-external-USB-keyboard/m-p/5217121
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
[bhelgaas: commit log, move to arch/x86/pci/fixup.c, add #includes]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org
2023-10-06 09:09:47 -05:00
..
acpi.c x86/PCI: Use pr_info() when possible 2022-12-10 10:33:18 -06:00
amd_bus.c range.h: Move resource API and constant to respective files 2023-08-18 10:19:00 -07:00
broadcom_bus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
bus_numa.c range.h: Move resource API and constant to respective files 2023-08-18 10:19:00 -07:00
bus_numa.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ce4100.c x86/pci: Mark local functions as 'static' 2023-05-18 11:56:10 -07:00
common.c x86/PCI: Add kernel cmdline options to use/ignore E820 reserved regions 2022-05-19 14:26:55 -05:00
direct.c x86/pci: Simplify code by using the new dmi_get_bios_year() helper 2018-02-23 08:20:30 +01:00
early.c PCI: Make early dump functionality generic 2018-06-29 20:06:07 -05:00
fixup.c x86/PCI: Avoid PME from D3hot/D3cold for AMD Rembrandt and Phoenix USB4 2023-10-06 09:09:47 -05:00
i386.c x86/PCI: Make a kernel-doc comment a normal one 2020-11-27 13:43:09 +01:00
init.c x86/pci: Create PCI/MSI irqdomain after x86_init.pci.arch_init() 2021-02-10 22:06:47 +01:00
intel_mid_pci.c x86/PCI: Describe @reg for type1_access_ok() 2021-02-15 20:10:30 +01:00
irq.c x86/PCI: Use struct_size() in pirq_convert_irt_table() 2023-07-13 11:33:20 -05:00
legacy.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
Makefile x86/PCI: Replace deprecated EXTRA_CFLAGS with ccflags-y 2019-11-21 07:49:27 -06:00
mmconfig_32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 387 2019-06-05 17:37:11 +02:00
mmconfig_64.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
mmconfig-shared.c x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space 2023-01-13 11:53:54 -06:00
numachip.c x86/PCI: Add pci_numachip_init() declaration 2021-08-12 14:07:31 -05:00
olpc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pcbios.c maccess: rename probe_kernel_address to get_kernel_nofault 2020-06-18 11:14:40 -07:00
sta2x11-fixup.c swiotlb: provide swiotlb_init variants that remap the buffer 2022-04-18 07:21:13 +02:00
xen.c x86/apic: Rename disable_apic 2023-08-09 11:58:16 -07:00