diff options
| author | Tim Van Patten <timvp@google.com> | 2022-08-16 12:09:23 -0600 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2022-09-19 09:53:17 +0000 |
| commit | a90aebbf2a471b901bd1aa40e12e4f6a021b8ecc (patch) | |
| tree | bc89fd3e4af2ac4b9c2ec2a0eba6892268e8c2c1 /src/soc | |
| parent | 2d9e96a5ab175e126929e8d2314227cdd441857f (diff) | |
soc/amd/acpi: Add low/no battery mode to DPTC
Update acpigen_write_alib_dptc() to support "low/no battery mode",
which throttles the SOC when there is no battery connected or the
battery charge is critically low.
This is in preparation for enabling this functionality for Mendocino.
BUG=b:217911928
TEST=Build zork
TEST=Boot nipperkin
TEST=Boot skyrim
Signed-off-by: Tim Van Patten <timvp@google.com>
Change-Id: Icea10a3876a29744ad8485be1557e184bcbfa397
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66804
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/amd/common/acpi/dptc.asl | 12 | ||||
| -rw-r--r-- | src/soc/amd/common/block/acpi/alib.c | 29 | ||||
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/alib.h | 1 |
3 files changed, 42 insertions, 0 deletions
diff --git a/src/soc/amd/common/acpi/dptc.asl b/src/soc/amd/common/acpi/dptc.asl index 611024cb02..e97aade50c 100644 --- a/src/soc/amd/common/acpi/dptc.asl +++ b/src/soc/amd/common/acpi/dptc.asl @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0-only */ External(\_SB.DDEF, MethodObj) +External(\_SB.DTHL, MethodObj) External(\_SB.DTAB, MethodObj) Scope (\_SB) @@ -13,6 +14,17 @@ Scope (\_SB) Return (Zero) } + /* If _SB.DTHL is not present, then DPTC Tablet Mode is not enabled. + * Throttle the SOC if the battery is not present (BTEX), the battery level is critical + * (BFCR), or the battery is cutoff (BFCT). */ + If (CondRefOf (\_SB.DTHL) && + (!\_SB.PCI0.LPCB.EC0.BTEX || \_SB.PCI0.LPCB.EC0.BFCR || \_SB.PCI0.LPCB.EC0.BFCT)) + { + \_SB.DTHL() + Return (Zero) + } + + /* If _SB.DTAB is not present, then DPTC Tablet Mode is not enabled. */ If (CondRefOf (\_SB.DTAB) && (\_SB.PCI0.LPCB.EC0.TBMD == One)) { \_SB.DTAB() diff --git a/src/soc/amd/common/block/acpi/alib.c b/src/soc/amd/common/block/acpi/alib.c index 4f6eafb320..3c01d85a41 100644 --- a/src/soc/amd/common/block/acpi/alib.c +++ b/src/soc/amd/common/block/acpi/alib.c @@ -45,6 +45,35 @@ void acpigen_write_alib_dptc_default(uint8_t *default_param, size_t default_para acpigen_write_scope_end(); } +void acpigen_write_alib_dptc_no_battery(uint8_t *no_battery_param, size_t no_battery_param_len) +{ + /* Scope (\_SB) */ + acpigen_write_scope("\\_SB"); + + /* Low/No Battery Mode */ + /* Scope (\_SB) + * { + * Method (DTHL, 0, Serialized) + * { + * Debug = "DPTC: Using low/no battery mode SOC DPTC settings." + * Name (THTL, Buffer (0x25) + * { + * ... + * }) + * \_SB.ALIB + * 0x0C + * THTL + * } + * } + */ + acpigen_write_method_serialized("DTHL", 0); + acpigen_write_debug_string("DPTC: Using low/no battery mode SOC DPTC settings."); + acpigen_dptc_call_alib("THTL", no_battery_param, no_battery_param_len); + acpigen_write_method_end(); + + acpigen_write_scope_end(); +} + void acpigen_write_alib_dptc_tablet(uint8_t *tablet_param, size_t tablet_param_len) { /* Scope (\_SB) */ diff --git a/src/soc/amd/common/block/include/amdblocks/alib.h b/src/soc/amd/common/block/include/amdblocks/alib.h index 6e193661bd..3de40181fd 100644 --- a/src/soc/amd/common/block/include/amdblocks/alib.h +++ b/src/soc/amd/common/block/include/amdblocks/alib.h @@ -28,6 +28,7 @@ struct alib_dptc_param { } __packed; void acpigen_write_alib_dptc_default(uint8_t *default_param, size_t default_param_len); +void acpigen_write_alib_dptc_no_battery(uint8_t *no_battery_param, size_t no_battery_param_len); void acpigen_write_alib_dptc_tablet(uint8_t *tablet_param, size_t tablet_param_len); #endif /* !__ACPI__ */ |