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-rw-r--r-- | udev.sh | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/udev.sh b/udev.sh new file mode 100644 index 000000000000..41869bee9ce1 --- /dev/null +++ b/udev.sh @@ -0,0 +1,79 @@ +#!/bin/sh +# Copyright (c) 2016 DisplayLink (UK) Ltd. +# File autogenerated by udev-installer.sh script + +get_evdi_dev_count() +{ + if [ "$(ls -l /sys/devices/platform/* | grep evdi | wc -l)" = "0" ]; then + echo "0" + return + fi + + cat /sys/devices/platform/evdi.*/drm/card*/card*/status | grep "^connected$" | wc -l +} + +get_displaylink_dev_count() +{ + cat /sys/bus/usb/devices/*/idVendor | grep 17e9 | wc -l +} + +start_displaylink() +{ + if [ "$(get_displaylink_dev_count)" != "0" ]; then + start_service + fi +} + +try_stop_displaylink() +{ + if [ "$(get_evdi_dev_count)" = "0" ]; then + parent_dev_path="$1" + if [ -d "$parent_dev_path" ]; then + echo "1" + return + fi + + if [ "$(get_displaylink_dev_count)" = "0" ]; then + stop_service + echo "0" + return + fi + fi + echo "1" +} + +stop_displaylink() +{ + parent_devpath=$(dirname /sys$1) + retry_num="50" # 5s + while [ "$(try_stop_displaylink $parent_devpath)" != "0" ] && [ "$retry_num" != "0" ]; + do + sleep 0.1 + retry_num=$((retry_num-1)) + done +} + +main() +{ + op=$1 + devpath=$2 + if [ "$op" = "START" ]; then + start_displaylink + elif [ "$op" = "STOP" ]; then + stop_displaylink $devpath + fi +} + +start_service() +{ + systemctl start displaylink.service +} + +stop_service() +{ + systemctl stop displaylink.service +} + + +main $1 $2 + |