Sorry, not a linux god, so can you add a little more detail? Do I just need to change the content of the file from 'msm-adreno-tz' to 'performance'? As a supplementary question, some brief notes on how one finds out such esoteric info might be appreciated by us lesser mortals
echo 'performance' > /sys/devices/soc.0/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/devfreq/governor