APPLIED [OEM-5.6] Re: [SRU] [F/G/Unstable/OEM-5.6] [PATCH 0/2] Refresh ACPI wakeup power to make Thunderbolt hotplug detection work
Timo Aaltonen
tjaalton at ubuntu.com
Thu Dec 3 11:20:28 UTC 2020
On 30.11.2020 10.13, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1906229
>
> [Impact]
> Dell Precision 5550 cannot detect Thunderbolt device hotplug.
>
> [Fix]
> Refresh ACPI wakeup power if it's already enabled to make GPE work.
>
> [Test]
> Make sure the root port of TBT hierachy is in D3cold.
> Plug a Thunderbolt Dock or Thunderbolt Disk, the system cannot detect
> anything.
>
> With the patch applied, OS can always detect hotplugged Thunderbolt
> devices.
>
> [Where problems could occur]
> Though we refresh the wakeup device power, we didn't disable/enable ACPI
> GPEs, so we won't miss any GPE event from this fix.
>
> Rafael J. Wysocki (2):
> PM: ACPI: PCI: Drop acpi_pm_set_bridge_wakeup()
> PM: ACPI: Refresh wakeup device power configuration every time
>
> drivers/acpi/device_pm.c | 62 +++++++++++++++++++---------------------
> drivers/pci/pci-acpi.c | 4 +--
> include/acpi/acpi_bus.h | 5 ----
> 3 files changed, 31 insertions(+), 40 deletions(-)
>
applied to oem-5.6, thanks
--
t
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