diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2023-04-25 16:23:37 +0200 |
|---|---|---|
| committer | Lean Sheng Tan <sheng.tan@9elements.com> | 2023-05-01 06:38:36 +0000 |
| commit | 0eb5974def63a2fc0dce6dfdad62b0b4c6f4b865 (patch) | |
| tree | 07c39c0c877c94778a483b69883642ebac786575 /src | |
| parent | cd48c7ece3d38acaf67d25e35b1a66a47728aec8 (diff) | |
acpigen: Add a runtime method to override exposed _Sx sleep states
This allows mainboards to override available sleep states at runtime.
This is done by adding a IntObj in SSDT that DSDT consumes to override
the available _Sx states.
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Ic21830c1ef9c183b1e3005cc1f8b7daf7e9ea998
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74762
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/acpi/acpigen.c | 14 | ||||
| -rw-r--r-- | src/include/acpi/acpigen.h | 4 | ||||
| -rw-r--r-- | src/southbridge/intel/common/acpi/sleepstates.asl | 5 |
3 files changed, 23 insertions, 0 deletions
diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c index d613becbc3..94a6f908a9 100644 --- a/src/acpi/acpigen.c +++ b/src/acpi/acpigen.c @@ -2364,3 +2364,17 @@ void acpigen_write_delay_until_namestr_int(uint32_t wait_ms, const char *name, u acpigen_emit_byte(LOCAL7_OP); acpigen_pop_len(); /* While */ } + +void acpigen_ssdt_override_sleep_states(bool enable_s1, bool enable_s2, bool enable_s3, + bool enable_s4) +{ + assert(!(enable_s1 && CONFIG(ACPI_S1_NOT_SUPPORTED))); + assert(!(enable_s3 && !CONFIG(HAVE_ACPI_RESUME))); + assert(!(enable_s4 && CONFIG(DISABLE_ACPI_HIBERNATE))); + + acpigen_write_scope("\\"); + uint32_t sleep_enable = (enable_s1 << 0) | (enable_s2 << 1) + | (enable_s3 << 2) | (enable_s4 << 3); + acpigen_write_name_dword("OSFG", sleep_enable); + acpigen_pop_len(); +} diff --git a/src/include/acpi/acpigen.h b/src/include/acpi/acpigen.h index 180e93779d..fc1d01b4e3 100644 --- a/src/include/acpi/acpigen.h +++ b/src/include/acpi/acpigen.h @@ -695,4 +695,8 @@ void acpigen_resource_qword(u16 res_type, u16 gen_flags, u16 type_flags, /* Emits Notify(namestr, value) */ void acpigen_notify(const char *namestr, int value); +/* Create a namespace \OSFG to override the enabled sleep states */ +void acpigen_ssdt_override_sleep_states(bool enable_s1, bool enable_s2, bool enable_s3, + bool enable_s4); + #endif /* __ACPI_ACPIGEN_H__ */ diff --git a/src/southbridge/intel/common/acpi/sleepstates.asl b/src/southbridge/intel/common/acpi/sleepstates.asl index 079ab1ab84..14ed86e91e 100644 --- a/src/southbridge/intel/common/acpi/sleepstates.asl +++ b/src/southbridge/intel/common/acpi/sleepstates.asl @@ -15,6 +15,11 @@ If (CONFIG(DISABLE_ACPI_HIBERNATE)) { SSFG &= 0xf7 } +External (\OSFG, IntObj) +If (CondRefOf(\OSFG)) { + SSFG = \OSFG +} + /* Supported sleep states: */ Name(\_S0, Package () {0x00, 0x00, 0x00, 0x00} ) /* (S0) - working state */ |