little script for toggling PIP on a dell monitor using ddcutil

ddcutil_pip.sh

#!/bin/bash

TARGET_DIS=1

VCP=E9


ON_VALUE=0x21
OFF_VALUE=0x00

# possible options:
#   Feature: E9 (Manufacturer specific feature)
#   Values: 00 01 02 21 22 24 (interpretation unavailable)
#
# 0x00 is off
# 0x01 toggles makes big small...
# 0x02 switches position?

# 0x21 is SMALL
# 0x22 is LARGE
# 0x24 half and half


while [ "$1" != "" ]; do
    case $1 in
        on|On|ON|1|off|Off|OFF|0)
            D_VAL="${1^^}"
            case $D_VAL in
                ON|1)
                    SET_ON=1
                    ;;
                OFF|0)
                    SET_ON=0
                    ;;
            esac
            ;;
        --dis=*)
            TARGET_DIS=$(echo "$1" | sed 's/--dis=//g')
            case $TARGET_DIS in
                1)
                    PLACE_HOLDER=0
                    ;;
                2)
                    PLACE_HOLDER=0
                    ;;
                *)
                    echo "DISPLAY must be 1 or 2"
                    exit 1
            esac
            ;;
        *)
            printf "unknown argument! '%s'\n" $1
            printf "   use --help / -h for usage examples\n"
            exit 1
        ;;
    esac
    shift
done

if [ -z $SET_ON ]; then
    echo "NEED ON or OFF arg!"
    exit 1
fi

if [ $SET_ON == 1 ]; then
    ddcutil --display=$TARGET_DIS setvcp $VCP $ON_VALUE
    exit 1
fi

if [ $SET_ON == 0 ]; then
    ddcutil --display=$TARGET_DIS setvcp $VCP $OFF_VALUE
    exit 1
fi