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* [PATCH 0/2] Add support for StorageD3Enable _DSD property
@ 2020-04-28  0:32 David E. Box
  2020-04-28  0:32 ` [PATCH 1/2] pci: Add ACPI StorageD3Enable _DSD support David E. Box
                   ` (5 more replies)
  0 siblings, 6 replies; 40+ messages in thread
From: David E. Box @ 2020-04-28  0:32 UTC (permalink / raw)
  To: rjw, lenb, bhelgaas, kbusch, axboe, hch, sagi
  Cc: David E. Box, linux-acpi, linux-pci, linux-nvme, linux-kernel

NVMe storage power management during suspend-to-idle, particularly on
laptops, has been inconsistent with some devices working with D3 while
others must rely on NVMe APST in order for power savings to be realized.
Currently the default is to use APST unless quirked to do otherwise.
However newer platforms, like Intel Comet Lake systems, may require NVMe
drives to use D3 in order for the PCIe ports to be properly power managed.
To make it easier for drivers to choose, these platforms may supply a
special "StorageD3Enable" _DSD property under the root port that the device
is attached to. If supplied, the driver must use D3 in order for the
platform to realize the deepest power savings in suspend-to-idle.
    
The first patch adds the new _DSD GUID and fowards the property through the
pci/acpi layer to the pci device.

The second patch adds support for the property to the nvme driver.

David E. Box (2):
  pci: Add ACPI StorageD3Enable _DSD support
  drivers/nvme: Add support for ACPI StorageD3Enable property

 drivers/acpi/property.c |  3 +++
 drivers/nvme/host/pci.c |  7 ++++++
 drivers/pci/pci-acpi.c  | 47 +++++++++++++++++++++++++++++++++++++++++
 drivers/pci/pci.c       |  6 ++++++
 drivers/pci/pci.h       |  4 ++++
 include/linux/pci.h     |  1 +
 6 files changed, 68 insertions(+)

-- 
2.20.1


^ permalink raw reply	[flat|nested] 40+ messages in thread

end of thread, other threads:[~2021-05-26 19:25 UTC | newest]

Thread overview: 40+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-28  0:32 [PATCH 0/2] Add support for StorageD3Enable _DSD property David E. Box
2020-04-28  0:32 ` [PATCH 1/2] pci: Add ACPI StorageD3Enable _DSD support David E. Box
2020-05-18 12:34   ` Rafael J. Wysocki
2020-05-19 17:10     ` David E. Box
2020-04-28  0:32 ` [PATCH 2/2] drivers/nvme: Add support for ACPI StorageD3Enable property David E. Box
2020-04-28  5:13 ` [PATCH 0/2] Add support for StorageD3Enable _DSD property Christoph Hellwig
2020-04-28 14:09   ` David E. Box
2020-04-28 14:22     ` Christoph Hellwig
2020-04-28 15:27       ` David E. Box
2020-04-29  5:20         ` Williams, Dan J
2020-04-29 15:10           ` Keith Busch
2020-04-29 16:11           ` David E. Box
2020-05-01 13:12             ` hch
2020-05-01 15:54               ` David E. Box
2020-05-01 13:10           ` hch
2020-05-18 13:51           ` David Woodhouse
2020-05-18 17:20             ` Dan Williams
2020-06-12 20:48 ` [PATCH V2 0/2] nvme: Add support for ACPI StorageD3Enable property David E. Box
2020-06-24 18:55   ` David E. Box
2020-06-24 19:10     ` Dan Williams
2020-06-24 19:39       ` David E. Box
2020-07-02 21:04   ` [PATCH v3] drivers/nvme: " David E. Box
2020-07-02 22:50   ` [PATCH v4] " David E. Box
2020-07-03  7:18     ` kernel test robot
2020-07-06 14:57     ` Rafael J. Wysocki
2020-07-07 21:24       ` David E. Box
2020-07-07  7:09     ` Christoph Hellwig
2020-07-09 18:43     ` [PATCH V5] " David E. Box
2020-07-13 11:12       ` Rafael J. Wysocki
2020-07-16 14:39         ` Christoph Hellwig
2021-05-26 19:25       ` Raul E Rangel
2020-06-12 20:48 ` [PATCH V2 1/2] PCI: Add ACPI StorageD3Enable _DSD support David E. Box
2020-06-24 21:15   ` Bjorn Helgaas
2020-06-25 11:30     ` Rafael J. Wysocki
2020-06-25 12:16       ` Mika Westerberg
2020-06-25 17:07       ` David E. Box
2020-06-25 17:30       ` Bjorn Helgaas
2020-06-24 21:37   ` Bjorn Helgaas
2020-06-24 22:09     ` David E. Box
2020-06-12 20:48 ` [PATCH V2 2/2] drivers/nvme: Add support for ACPI StorageD3Enable property David E. Box

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