Re: [PATCH v3] ACPI: x86: Disable wakeup on MSI MS-1592 and MS-1594 dGPU root port

[sashiko-bot@kernel.org]

> On MSI Summit E16 Flip A12UCT (motherboard MS-1592, BIOS E1592IMS.111)
> and MSI Prestige 16 Studio A13VE / Summit E16 Flip A13VET (motherboard
> MS-1594, BIOS E1594IMS.115), the I2C touchpad (ELAN0305:00, 04F3:31FD)
> permanently stops generating interrupts as soon as the discrete NVIDIA
> GPU (0000:01:00.0) and its parent PCIe Root Port (0000:00:06.0,
> \_SB.PC00.PEG0) enter D3cold.
> 
> In the platform's SSDT (MSI_NB / AdlP_Rvp), \_SB.PC00.PEG0 sets its wake
> GPIO (WAKG) from the BIOS NVS variable P1WP, which erroneously points to
> GPP_A20 (INTC1055:00 pin 62) -- the GPIO interrupt line wired to the
> touchpad.
> 
> During boot, \_SB.PC00.PEG0.PON() calls \_SB.SHPO(WAKG, One), setting
> PAD_CFG0_GPP_A20.GPIROUTSCI = 0 and HostSwOwn = 1 so the OS GPIO driver
> owns the pin. However, when the root port runtime-suspends to D3cold,
> [ ... ]
> owned by the GPIO driver.
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220725
> Cc: stable@vger.kernel.org
> Signed-off-by: Victor Carreras <vicajilau@gmail.com>

Sashiko has reviewed this patch and found no issues.

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