a20x KGSL dump cmdbuf

dumpcmdbufs.sh

#!/bin/bash
# enable command stream dumping, clear kernel ringbuffer,
# write output to a file provided on the command line
# this can be converted to .rd using dmesg2rd.py from 
# https://github.com/laanwj/freedreno/blob/master/mlog/dmesg2rd.py
set -e
if [ "$(whoami)" != "root" ]; then
    echo "This script needs to be executed as root"
    exit 1
fi

function ctrl_c() {
    echo "** Trapped CTRL-C, disabling command stream dump"
    echo "0" > /sys/kernel/debug/kgsl/dumpcmdbufs
}

trap ctrl_c INT
echo "1" > /sys/kernel/debug/kgsl/dumpcmdbufs
dmesg -C
dmesg -w > "$1"