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@ouija
Last active August 2, 2019 06:59
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HDMI detection audio switcher script
#!/system/bin/sh
# HDMI detection audio switcher script by @ouija
# note the following patches may be required for HDMI connect/disconnect status to work properly in some kernels
# drm/i915: Fix the HDMI hot plug disconnection failure (v2) -> https://patchwork.kernel.org/patch/10625143/
# drm/i915: delay hotplug scheduling -> https://patchwork.kernel.org/patch/10613549/
# get hdmi insert input device [disabled/not reliable]
# DEVICE=$(getevent -Sv | grep -B 5 -m1 'HDMI/DP,pcm=2' | grep -m1 'add device' | cut -d : -f 2)
#if [ ! -z "$DEVICE" ]; then
while true
do
# get hdmi connect/disconnect event [not reliable]
#HDMI_EVENT=$(getevent -l -c 1 $DEVICE)
#if [ ! -z "$HDMI_EVENT" ]; then
# check if HDMI connected
HDMI_STATUS=$(cat /sys/class/drm/card0/card0-HDMI-A-2/status)
if [ "$HDMI_STATUS" == "connected" ]; then
#echo "HDMI Connected!"
# Dirty fix for HDMI audio
#if ls /dev/snd/pcmC0D2p 1> /dev/null 2>&1; then
# mv /dev/snd/pcmC0D0p /dev/snd/pcmC0D0p_tmp
# mv /dev/snd/pcmC0D2p /dev/snd/pcmC0D0p
#fi
# Get audio out prop
AUDIO_OUT=$(getprop hal.audio.out)
if [ "$AUDIO_OUT" != "pcmC0D2p" ]; then
#echo "Setting to pcmC0D2p"
# set prop to use hdmi out
setprop hal.audio.out pcmC0D2p
pkill audioserver
fi
elif [ "$HDMI_STATUS" == "disconnected" ]; then
#echo "HDMI Disconnected!"
# Revert Dirty fix for HDMI audio
#if ls /dev/snd/pcmC0D0p_tmp 1> /dev/null 2>&1; then
# mv /dev/snd/pcmC0D0p /dev/snd/pcmC0D2p
# mv /dev/snd/pcmC0D0p_tmp /dev/snd/pcmC0D0p
#fi
# Get audio out prop
AUDIO_OUT=$(getprop hal.audio.out)
if [ ! -z "$AUDIO_OUT" ]; then
if [ "$AUDIO_OUT" != "pcmC1D0p" ]; then
#echo "Setting to pcmC1D0p"
# set prop to use hdmi out
setprop hal.audio.out pcmC1D0p
pkill audioserver
fi
fi
fi
#fi
sleep 3
done
#fi
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