blob: 70105b7b09baa4895ae1c57b5bf425ba0f224964 [file] [log] [blame]
#! /bin/sh
#
# Laptop mode tools module: Intel HDA integrated audio power saving mode.
#
if [ x$CONTROL_INTEL_HDA_POWER = x1 ] ; then
if [ $ON_AC -eq 1 ]; then
if [ "$ACTIVATE" -eq 1 ]; then
INTEL_HDA_POWERSAVE="$LM_AC_INTEL_HDA_POWERSAVE"
else
INTEL_HDA_POWERSAVE="$NOLM_AC_INTEL_HDA_POWERSAVE"
fi
else
INTEL_HDA_POWERSAVE="$BATT_INTEL_HDA_POWERSAVE"
fi
# Handle Intel HDA Power Save
if [ x$INTEL_HDA_POWERSAVE = x1 ]; then
if [ -w /sys/module/snd_hda_intel/parameters/power_save ]; then
echo $INTEL_HDA_DEVICE_TIMEOUT > /sys/module/snd_hda_intel/parameters/power_save
log "VERBOSE" "Intel HDA power save mode enabled with timeout $INTEL_HDA_DEVICE_TIMEOUT."
if [ -c /dev/dsp ]; then
# This can fail if the audio device is busy.
# Since this failure is non-fatal (worst case is that the timer changes
# don't get activated), we don't bother if it was successful or not
#(exec 2>/dev/null; echo 1 > /dev/dsp;)
# Better way
echo 1 2>/dev/null >/dev/dsp
log "VERBOSE" "Initialize timer change by close/open /dev/dsp"
fi
else
log "VERBOSE" "Intel HDA power saving is not available on this system."
fi
fi
# Handle Intel HDA Controller Power Savings.
if [ x$INTEL_HDA_DEVICE_CONTROLLER = x1 ]; then
POWER_SAVE="Y"
else
POWER_SAVE="N"
fi
if [ -w /sys/module/snd_hda_intel/parameters/power_save_controller ]; then
echo $POWER_SAVE > /sys/module/snd_hda_intel/parameters/power_save_controller
log "VERBOSE" "Intel HDA Controller power save set to $POWER_SAVE."
else
log "VERBOSE" "Sound Card doesn't seem to support Controller Power Save."
fi
else
log "VERBOSE" "Intel HDA audio power setting is disabled."
fi