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authorLukas Wunner <lukas@wunner.de>2018-07-20 01:28:00 +0300
committerBjorn Helgaas <bhelgaas@google.com>2018-07-31 19:09:36 +0300
commit47a8e237ed443c174f8f73402755c458c56eb611 (patch)
tree54e25d943d8798445fac98b5730d02341af24778 /drivers/pci/hotplug
parenteb3b5bf1a88d0cc1cd7acc7464eb211d69779808 (diff)
downloadlinux-47a8e237ed443c174f8f73402755c458c56eb611.tar.xz
PCI: Whitelist Thunderbolt ports for runtime D3
Thunderbolt controllers can be runtime suspended to D3cold to save ~1.5W. This requires that runtime D3 is allowed on its PCIe ports, so whitelist them. The 2015 BIOS cutoff that we've instituted for runtime D3 on PCIe ports is unnecessary on Thunderbolt because we know that even the oldest controller, Light Ridge (2010), is able to suspend its ports to D3 just fine -- specifically including its hotplug ports. And the power saving should be afforded to machines even if their BIOS predates 2015. Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Andreas Noever <andreas.noever@gmail.com>
Diffstat (limited to 'drivers/pci/hotplug')
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