APPLIED [OEM-5.14] Re: [PATCH 0/2][SRU][OEM-5.14][U] Fix power button wakeup with shared IRQs on AMD platforms

[Timo Aaltonen]

On 8.12.2021 23.14, Alex Hung wrote:
> BugLink: https://bugs.launchpad.net/bugs/1953540
> 
> [Impact]
>   On some platform designs the the power button wakeup from s0i3 doesn't work
>   even with the existing changes to IRQ handling for the GPIO controller.
> 
>   In these designs the ACPI SCI and GPIO controller share an IRQ. Due to the
>   way the s2idle loop handles the IRQ for the ACPI SCI the GPIO controller
>   driver doesn't get a chance to wake the system in this circumstance.
> 
> [Fix]
>   To fix this rework the existing IRQ handler function to function as a checker
>   and an IRQ handler depending on the calling arguments.
> 
>   The patches were cherry-picked from 5.16rc3.
> 
> [Test]
>   This is requested by AMD. The test was done on two systems L15 AMD Gen2 and
>   P14s AMD Gen2 and both can be waken up by power button presses.
> 
> [Where problems could occur]
>   Risk is low. This only affects AMD platforms with s0i3 enabled. Suspends (S3)
>   and resumes are not affect.
> 
> Mario Limonciello (2):
>    ACPI: Add stubs for wakeup handler functions
>    pinctrl: amd: Fix wakeups when IRQ is shared with SCI
> 
>   drivers/pinctrl/pinctrl-amd.c | 29 ++++++++++++++++++++++++++---
>   include/linux/acpi.h          |  9 +++++++++
>   2 files changed, 35 insertions(+), 3 deletions(-)
> 

applied to oem-5.14, thanks

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