1#!/bin/sh -eu 2 3if ! lsmod | grep i2c_dev >/dev/null 2>&1; then 4 echo "kernel module i2c-dev must be loaded" 5 exit 6fi 7 8if ! command -v i2cdump >/dev/null 2>&1; then 9 echo "i2cdump from i2c-tools must be installed" 10 exit 11fi 12 13 14for connector in $(find /sys/class/drm/ -maxdepth 1 -name 'card[0-9]-*'); do 15 bus=$(find "$connector/" -maxdepth 1 -mindepth 1 -type d -name 'i2c-*' -print -quit | sed -n 's/.*\/i2c\-\(.*\)/\1/p') 16 if [ "$bus" = "" ]; then 17 bus=$(find "$connector/ddc/i2c-dev/" -maxdepth 1 -mindepth 1 -type d -name 'i2c-*' -print -quit | sed -n 's/.*\/i2c\-\(.*\)/\1/p') 18 fi 19 if [ "$bus" = "" ]; then 20 echo "Connector $(basename $connector) does not have an i2c bus. Skipping." 21 continue 22 fi 23 24 echo "Dumping connector $(basename $connector) i2c bus address 0x50" 25 i2cdump -y $bus 0x50 b 26 27 echo "Dumping connector $(basename $connector) i2c bus address 0x51" 28 i2cdump -y $bus 0x51 b 29 30 echo "Dumping connector $(basename $connector) i2c bus address 0x54" 31 i2cdump -y $bus 0x54 b 32 33 echo "Dumping connector $(basename $connector) i2c bus address 0x55" 34 i2cdump -y $bus 0x55 b 35done 36 37