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authorMario Limonciello <mario.limonciello@amd.com>2025-03-04 00:27:09 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2025-03-11 22:41:48 +0300
commita7e23ec17feecc7bac0d500cea900cace7b50129 (patch)
tree3e7638021d0d57836e73dcfd5ce34d787daa5ee2 /tools/perf/scripts/python/libxed.py
parent7eb172143d5508b4da468ed59ee857c6e5e01da6 (diff)
downloadlinux-a7e23ec17feecc7bac0d500cea900cace7b50129.tar.xz
ACPI: button: Install notifier for system events as well
On some systems when the system is put to sleep pressing the ACPI power button will cause the EC SCI to try to wake the system by a Notify(DEV, 0x2) with an intention to wake the system up from suspend. This behavior matches the ACPI specification in ACPI 6.4 section 4.8.3.1.1.2 which describes that the AML handler would generate a Notify() with a code of 0x2 to indicate it was responsible for waking the system. This currently doesn't work because acpi_button_add() only configured `ACPI_DEVICE_NOTIFY` which means that device handler notifications 0x80 through 0xFF are handled. To fix the wakeups on such systems, adjust the ACPI button handler to use `ACPI_ALL_NOTIFY` which will handle all events 0x00 through 0x7F. Reported-by: Yijun Shen <Yijun.Shen@dell.com> Tested-by: Richard Gong <Richard.Gong@amd.com> Link: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/04_ACPI_Hardware_Specification/ACPI_Hardware_Specification.html?highlight=0x2#control-method-power-button Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Tested-by: Yijun Shen <Yijun_Shen@Dell.com> Link: https://patch.msgid.link/20250303212719.4153485-1-superm1@kernel.org [ rjw: Removed uneeded semicolon ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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