src/sys/dev/acpica, branch main

acpi_spmc(4): Remove redundant setting of 'sc->dev' on attach

2026-04-17T21:04:50+00:00

Should have been part of the previous commit (but PEBCAK).

Reviewed by:    obiwac
Fixes:          bd05b47fbd8b ("acpi_spmc(4): Small probe improvements/fixes")
Sponsored by:   The FreeBSD Foundation
Differential Revision:  https://reviews.freebsd.org/D56483

acpi_spmc(4): Small probe improvements/fixes

2026-04-17T20:27:51+00:00

Remove the test on presence of an ACPI handle, this is implied by
ACPI_ID_PROBE() succeeding.

Set 'sc->dev' early, so that acpi_spmc_check_dsm_set() using
device_printf() will print the driver name.

Add a missing newline after printing that more DSM functions are
implemented then expected.

Reviewed by:    obiwac
Sponsored by:   The FreeBSD Foundation
Differential Revision:  https://reviews.freebsd.org/D56483

acpi: Return "unknown D-state" in acpi_d_state_to_str() if unknown

2026-04-16T07:17:07+00:00

Some ACPI debugging prints call acpi_d_state_to_str() on unset D-states
(i.e. ACPI_STATE_UNKNOWN), so return a string explicitly saying "unknown
D-state" instead of just panicking.

Fixes:		84bbfc32a3f4 ("acpi_powerres: D3cold support")
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days

acpi: Parse _S3D in s2idle instead of _S255D

2026-04-08T12:11:23+00:00

Previously, when entering s2idle, we were parsing the _S255D object to
get the shallowest D-state supported by device, as
acpi_stype_to_sstate() returns -1 for s2idle.

Instead, we should read _S3D.

Relevant document:
https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/07_Power_and_Performance_Mgmt/device-power-management-objects.html#s3d-s3-device-state

Reviewed by:	olce
Tested by:	emaste, olce
Approved by:	olce
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D55118

acpi_spmc: Call new MS turn on display DSM

2026-04-01T11:56:04+00:00

Microsoft added a new function index (turn on display, 9) to their DSM
set. This revision calls this, which fixes S0ix on certain machines,
such as the Lenovo Yoga Slim 7i Aura, who's ECs use this method as a
trigger to restore power to certain devices.

See commit 229ecbaac6b3 ("ACPI: x86: s2idle: Invoke Microsoft _DSM
Function 9 (Turn On Display)") on Linux.

Also see the following:
https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby-firmware-notifications#turn-on-display-notification-function-9

Reviewed by:	olce
Approved by:	olce
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D56062

acpi_spmc: Fail probe if acpi_spmc device already attached

2026-04-01T11:54:58+00:00

We cannot have more than one SPMC device.

Reviewed by:	olce
Approved by:	olce
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D56062

acpi_spmc: Improve device description

2026-03-31T10:01:10+00:00

"Low Power S0 Idle" doesn't mean that much. "System Power Management
Controller" is what "SPMC" stands for in the first place.

Sponsored by:	The FreeBSD Foundation

acpi_spmc: Fix checking expected DSMs

2026-03-24T08:00:58+00:00

Previously was or'ing the indices of the DSMs directly, not their
corresponding bits. This commit rectifies this.

Reviewed by:	olce
Approved by:	olce
Fixes:	c5daa5a4c32c ("acpi_spmc: Add system power management controller driver")
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/https://reviews.freebsd.org/D56062

acpi_spmc: Simplify constraint freeing

2026-03-21T05:20:46+00:00

We don't need to check for NULL before calling free().

Sponsored by:	The FreeBSD Foundation

acpi: Print sysctl name in deprecated sleep type warning

2026-03-21T03:21:45+00:00

Reported by:	markj
Fixes:		97d152698f48 ("acpi: Use sleep types defined in sys/power.h")
Event:		AsiaBSDCon 2026
Sponsored by:	The FreeBSD Foundation