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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>
This commit is contained in:
Eric Lai 2019-04-29 15:17:06 +08:00 committed by Duncan Laurie
parent 8c0acc5515
commit 0c0a9810c7
3 changed files with 58 additions and 0 deletions
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2
src/mainboard/google/sarien/dsdt.asl
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@ -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)

28
src/mainboard/google/sarien/variants/arcada/include/variant/acpi/mainboard.asl Normal file
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@ -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)
}
}

28
src/mainboard/google/sarien/variants/sarien/include/variant/acpi/mainboard.asl Normal file
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@ -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)
}
}