#!/bin/bash
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# defines
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FREQ=0 #percent
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SERVICES=(perfd thermal-engine thermald mpdecision)
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DIR="/sys/class/kgsl/kgsl-3d0"
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###################### SETUP ######################
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# helper functions
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fileexists() {
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[ `adb shell "[ -f $1 ] && echo found"` ]
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}
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getprop() {
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if fileexists $1; then
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echo `adb shell cat $1 | tr -d '\r'`
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else
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echo "FILE $1 NOT FOUND"
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fi
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}
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setprop() {
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if fileexists $1; then
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adb shell "echo -n $2 > $1"
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else
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echo "FILE $1 NOT FOUND"
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fi
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}
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# use passed in percent frequency
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if [[ $# -eq 1 ]]; then
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FREQ=$1
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fi
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# setup
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if [[ "`adb shell id | tr -d '\r' | awk -F'[()]' '{print $2}'`" != "root" ]]; then
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adb root
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fi
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adb wait-for-device
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# device name
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echo Device: `adb shell getprop ro.product.model`
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# get available gpu frequencies in sorted order
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if fileexists $DIR/devfreq/available_frequencies; then
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frequencies=(`getprop $DIR/devfreq/available_frequencies`)
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elif fileexists $DIR/gpu_available_frequencies; then
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frequencies=(`getprop $DIR/gpu_available_frequencies`)
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elif fileexists /d/clock/gbus/possible_rates; then
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frequencies=(`getprop /d/clock/gbus/possible_rates`)
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else
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echo "Unable to find available GPU frequencies"
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echo
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exit
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fi
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frequencies=( `printf "%s\n" "${frequencies[@]}" | sort -n` )
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if [ ${frequencies[0]} == "(kHz)" ]; then
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frequencies=(`printf "%s000\n" "${frequencies[@]:1}"`)
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fi
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minFreq=${frequencies[0]}
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maxFreq=${frequencies[-1]}
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echo Frequencies: ${frequencies[@]}
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# find closest frequency
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targetFreq=$(( FREQ * ( maxFreq - minFreq ) / 100 + minFreq ))
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freq=`printf "%d\n" "${frequencies[@]}" | awk -v closest=${frequencies[0]} -v target=$targetFreq 'BEGIN{diff=$0-target;if(diff<0)diff=-diff;lowest=diff};{diff=$0-target;if(diff<0)diff=-diff;if(diff<lowest){lowest=diff;closest=$0}};END{print closest}'`
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echo Selected: $freq
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echo
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# freeze system
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for service in ${SERVICES[@]}; do
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adb shell stop $service
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done
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# set GPU properties if possible
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setprop $DIR/bus_split 0
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setprop $DIR/devfreq/governor performance
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setprop $DIR/force_bus_on 1
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setprop $DIR/force_rail_on 1
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setprop $DIR/force_clk_on 1
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setprop $DIR/idle_timer 1000000
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setprop $DIR/max_gpuclk $freq
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setprop $DIR/gpuclk $freq
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setprop /d/clock/override.gbus/state 1
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setprop /d/clock/override.gbus/rate $freq
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# final message
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echo "GPU Frequency set to $freq"
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