[PATCH v5 00/11] Improvements to S5 power consumption

[Mario Limonciello (AMD)]

A variety of issues both in function and in power consumption have been
raised as a result of devices not being put into a low power state when
the system is powered off.

There have been some localized changes[1] to PCI core to help these issues,
but they have had various downsides.

This series instead tries to use the S4 flow when the system is being
powered off.  This lines up the behavior with what other operating systems
do as well.  If for some reason that fails or is not supported, run their
shutdown() callbacks.

Cc: AceLan Kao <acelan.kao at canonical.com>
Cc: Kai-Heng Feng <kaihengf at nvidia.com>
Cc: Mark Pearson <mpearson-lenovo at squebb.ca>
Cc: Merthan Karakaş <m3rthn.k at gmail.com>
Cc: Eric Naim <dnaim at cachyos.org>
---
v4->v5:
 * Rebase on v6.17-rc1
 * Re-order series to be more bisectable for issues
 * Add tags where relevant
 * Split up PCI patches into more easily reviewable "chunks".

Mario Limonciello (AMD) (11):
  PM: Introduce new PMSG_POWEROFF event
  scsi: Add PM_EVENT_POWEROFF into suspend callbacks
  usb: sl811-hcd: Add PM_EVENT_POWEROFF into suspend callbacks
  USB: Pass PMSG_POWEROFF event to suspend_common() for poweroff with S4
    flow
  PCI: PM: Disable device wakeups when halting system through S4 flow
  PCI: PM: Split out code from pci_pm_suspend_noirq() into helper
  PCI: PM: Run bridge power up actions as part of restore phase
  PCI: PM: Use pci_power_manageable() in pci_pm_poweroff_noirq()
  PCI: Put PCIe ports with downstream devices into D3 at hibernate
  drm/amd: Avoid evicting resources at S5
  PM: Use hibernate flows for system power off

 drivers/base/power/main.c                  |  7 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  4 +
 drivers/pci/pci-driver.c                   | 99 +++++++++++++++-------
 drivers/scsi/mesh.c                        |  1 +
 drivers/scsi/stex.c                        |  1 +
 drivers/usb/core/hcd-pci.c                 | 10 ++-
 drivers/usb/host/sl811-hcd.c               |  1 +
 include/linux/pm.h                         |  5 +-
 include/trace/events/power.h               |  3 +-
 kernel/reboot.c                            |  6 ++
 10 files changed, 102 insertions(+), 35 deletions(-)


base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
-- 
2.43.0