get_evdi_dev_count()
{
if [ "$(ls -ld /sys/devices/platform/* | grep -c evdi)" = "0" ]; then
echo "0"
return
fi
cat /sys/devices/platform/evdi.*/drm/card*/card*/status | grep "^connected$" | 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$1")"
retry_num="50"
while [ "$(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()
{
rc-service dlm start
}
stop_service()
{
rc-service dlm stop
}
main "$1" "$2"