| #!/bin/bash |
| # Copyright 2022 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| # |
| # This script montiors dbus for suspend events and then sends a command |
| # to the cr50 to disable deep sleep during suspend. |
| # The disable deep sleep flag is transiant, so it must be resent before |
| # each suspend. |
| |
| set -eu -o pipefail |
| |
| # Remove SIGTERM trap to avoid recursion then kill process group |
| trap 'trap - SIGTERM && kill -- -$$' SIGTERM EXIT |
| |
| script_name="$(basename "$0")" |
| |
| logit() { |
| logger -t "${script_name}" -- "$@" |
| } |
| |
| # This command will disable deep sleep for just the next suspend |
| send_disable_deep_sleep_command_to_cr50() { |
| logit "Sending disable deep sleep command to Cr50" |
| if trunks_send --raw 80010000000c20000000003b >/dev/null; then |
| logit "Disable sleep command sent to Cr50" |
| else |
| logit "Error sending disable sleep command to Cr50" |
| fi |
| } |
| |
| # Monitor for the DBus SuspendImminent signal |
| monitor_suspend_dbus_signal() { |
| local interface='org.chromium.PowerManager' |
| local signal='SuspendImminent' |
| |
| logit "Start monitoring dbus for SuspendImminent signal" |
| while read -r line; do |
| if [ -z "${line##*${signal}*}" ]; then |
| logit "SuspendImminent signal received" |
| send_disable_deep_sleep_command_to_cr50 |
| fi |
| done < <(dbus-monitor --system --profile \ |
| "type='signal',interface='${interface}',member='${signal}'") |
| } |
| |
| main() { |
| monitor_suspend_dbus_signal |
| } |
| |
| main "$@" |
