diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/amd/cezanne/acpi/soc.asl | 2 | ||||
| -rw-r--r-- | src/soc/amd/common/acpi/upep.asl | 131 |
2 files changed, 133 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/acpi/soc.asl b/src/soc/amd/cezanne/acpi/soc.asl index 30b44c948d..be511042e4 100644 --- a/src/soc/amd/cezanne/acpi/soc.asl +++ b/src/soc/amd/cezanne/acpi/soc.asl @@ -19,6 +19,8 @@ Scope(\_SB) { #include <soc/amd/common/acpi/sleepstates.asl> +#include <soc/amd/common/acpi/upep.asl> + /* * Platform Wake Notify * diff --git a/src/soc/amd/common/acpi/upep.asl b/src/soc/amd/common/acpi/upep.asl new file mode 100644 index 0000000000..3fcf2f7eb4 --- /dev/null +++ b/src/soc/amd/common/acpi/upep.asl @@ -0,0 +1,131 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#define PEPD_DSM_UUID "e3f32452-febc-43ce-9039-932122d37721" +#define PEPD_DSM_LPI_ENUM_FUNCTIONS 0 +#define PEPD_DSM_LPI_ADDITIONAL_FUNCTIONS 1 +#define PEPD_DSM_LPI_GET_DEVICE_CONSTRAINTS 1 + +#define PEPD_DSM_NOTIFICATIONS_UUID "11e00d56-ce64-47ce-837b-1f898f9aa461" +#define PEPD_DSM_NOTIFICATION_ENUM_FUNCTIONS 0 + +/* + * Power Engine Plug-in Device + * + * References: + * * Intel Low Power S0 Idle + * * AMD Modern Standby BIOS Implementation Guide - #56358 + * * Linux Kernel: drivers/acpi/x86/s2idle.c + * * https://docs.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby-firmware-notifications + */ +Scope (\_SB) { + Device (PEP) { + Name (_HID, "AMDI0005") + Name (_CID, EisaId ("PNP0D80")) + Name (_UID, One) + + Method (_STA, 0, NotSerialized) { + Return (0x0F) + } + + /* + * Device constraints for low power states (may be used for debugging). + * For now there is only one disabled dummy device, because Windows + * expects at least one device and crashes without it with a bluescreen + * (`INTERNAL_POWER_ERROR`). Returning an empty package does not work. + */ + Name (DEVL, Package() { + Package() { + 0, /* Disabled */ + "\\DUMY", /* \DUMY - not existent */ + 0, /* Function States */ + 0 /* Minimum D-state */ + } + }) + + /* + * PEPD_DSM_UUID Helper method + * + * Arg0: Function Index + */ + Method (DSM0, 1, Serialized) { + Switch (ToInteger(Arg0)) { + /* + * Return a bit field of the supported functions for + * this UUID. + */ + Case (PEPD_DSM_LPI_ENUM_FUNCTIONS) { + Local0 = Buffer { 0x00 } + CreateByteField(Local0, 0x00, SUPP) + + SUPP = PEPD_DSM_LPI_ADDITIONAL_FUNCTIONS + SUPP |= 1 << PEPD_DSM_LPI_GET_DEVICE_CONSTRAINTS + + Return (Local0) + } + Case (PEPD_DSM_LPI_GET_DEVICE_CONSTRAINTS) { + Return (DEVL) + } + Default { + /* Unknown function */ + Return (Buffer() { 0x00 }) + } + } + } + + /* + * PEPD_DSM_NOTIFICATIONS_UUID Helper method + * + * Arg0: Function Index + */ + Method (DSM1, 1, Serialized) { + Switch (ToInteger(Arg0)) { + /* + * Return a bit field of the supported functions for + * this UUID. + */ + Case (PEPD_DSM_NOTIFICATION_ENUM_FUNCTIONS) { + /* + * TODO(b/185586290): Add additional functions when + * linux kernel driver is fixed. + */ + Return (Buffer() { 0x00 }) + } + Default { + /* Unknown function */ + Return (Buffer() { 0x00 }) + } + } + } + + /* + * Device Specific Method + * + * Arg0: UUID + * Arg1: Revision Id + * Arg2: Function Index + */ + Method (_DSM, 4, Serialized) { + Switch (ToBuffer(Arg0)) { + Case (ToUUID(PEPD_DSM_UUID)) { + /* Unsupported Revision */ + If (ToInteger(Arg1) != 0) { + Return (Buffer() { 0x00 }) + } + + Return (DSM0(Arg2)) + } + Case (ToUUID(PEPD_DSM_NOTIFICATIONS_UUID)) { + /* Unsupported Revision */ + If (ToInteger(Arg1) != 0) { + Return (Buffer() { 0x00 }) + } + + Return (DSM1(Arg2)) + } + Default { + Return (Buffer { 0x00 }) + } + } + } + } +} |