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| author | Eric Lai <ericr_lai@compal.corp-partner.google.com> | 2019-04-29 15:17:06 +0800 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2019-05-06 17:31:11 +0000 |
| commit | 0c0a9810c7d00524a8bcebacc36496b590de3a79 (patch) | |
| tree | a4ff2b5833eb4079ff99eeb13fb2fcd7cbd7e58b | |
| parent | 8c0acc5515f8a381cf2d33c61951d229d4ef358a (diff) | |
| download | coreboot-0c0a9810c7d00524a8bcebacc36496b590de3a79.tar.xz | |
mb/google/sarien: Turn off camera power when s0ix
Turn off camera power when s0ix for power saving.
BUG=b:129177593
TEST= measure camera power comsumption is 0mV under s0ix
Change-Id: I5a9b7ec1e95cc9931d8d5f2dc1254805c9d0ffed
Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32519
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
3 files changed, 58 insertions, 0 deletions
diff --git a/src/mainboard/google/sarien/dsdt.asl b/src/mainboard/google/sarien/dsdt.asl index e5b0ccad2e..58e0704deb 100644 --- a/src/mainboard/google/sarien/dsdt.asl +++ b/src/mainboard/google/sarien/dsdt.asl @@ -40,6 +40,8 @@ DefinitionBlock( #include <soc/intel/cannonlake/acpi/northbridge.asl> #include <soc/intel/cannonlake/acpi/southbridge.asl> } + /* Per board variant mainboard hooks. */ + #include <variant/acpi/mainboard.asl> } #if CONFIG(CHROMEOS) diff --git a/src/mainboard/google/sarien/variants/arcada/include/variant/acpi/mainboard.asl b/src/mainboard/google/sarien/variants/arcada/include/variant/acpi/mainboard.asl new file mode 100644 index 0000000000..7b252c7f1c --- /dev/null +++ b/src/mainboard/google/sarien/variants/arcada/include/variant/acpi/mainboard.asl @@ -0,0 +1,28 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Intel Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define CAM_EN GPP_B11 /* Active low */ + +/* Method called from LPIT prior to enter s0ix state */ +Method (MS0X, 1) +{ + If (Arg0) { + /* Turn off camera power */ + \_SB.PCI0.STXS (CAM_EN) + } Else { + /* Turn on camera power */ + \_SB.PCI0.CTXS (CAM_EN) + } +} diff --git a/src/mainboard/google/sarien/variants/sarien/include/variant/acpi/mainboard.asl b/src/mainboard/google/sarien/variants/sarien/include/variant/acpi/mainboard.asl new file mode 100644 index 0000000000..7b252c7f1c --- /dev/null +++ b/src/mainboard/google/sarien/variants/sarien/include/variant/acpi/mainboard.asl @@ -0,0 +1,28 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Intel Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define CAM_EN GPP_B11 /* Active low */ + +/* Method called from LPIT prior to enter s0ix state */ +Method (MS0X, 1) +{ + If (Arg0) { + /* Turn off camera power */ + \_SB.PCI0.STXS (CAM_EN) + } Else { + /* Turn on camera power */ + \_SB.PCI0.CTXS (CAM_EN) + } +} |