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sxmo_brightness: add support for overriding backlight device

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This uses the BACKLIGHT env var to override the device used for
controlling the backlight. My intention was to keep the default behavior
if it's unset, use the backlight/backlight path if that exists then fall
back to backlight/edp-backlight.

Finally, this changes the script to return immediately if no backlight
device is found with the given options.

Signed-off-by: Stacy Harper <contact@stacyharper.net>
This commit is contained in:
Clayton Craft 2021-04-23 23:54:41 -07:00 • committed by Stacy Harper
parent 5741f0692c
commit 4c3e6044ce
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GPG key ID: 5BAC92328B7C5D65
1 changed files with 9 additions and 5 deletions
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14
scripts/core/sxmo_brightness.sh
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@ -4,23 +4,27 @@
# shellcheck source=scripts/core/sxmo_common.sh
. "$(dirname "$0")/sxmo_common.sh"
[ -e /sys/class/backlight/edp-backlight ] && DEV=/sys/class/backlight/edp-backlight
[ -e /sys/devices/platform/backlight/backlight/backlight ] && DEV=/sys/devices/platform/backlight/backlight/backlight
BACKLIGHT="${BACKLIGHT:-/sys/devices/platform/backlight/backlight/backlight}"
if [ ! -e "$BACKLIGHT" ] && [ -e /sys/class/backlight/edp-backlight ]; then
BACKLIGHT=/sys/class/backlight/edp-backlight
fi
MAX=$(cat $DEV/max_brightness)
[ ! -e "$BACKLIGHT" ] && echo "unable to find backlight device" && exit 1
MAX=$(cat $BACKLIGHT/max_brightness)
MIN=2
MINSTEP=1
STEP=$(echo "($MAX - $MIN) / 10" | bc | xargs -ISTP echo -e "$MINSTEP\nSTP" | sort -r | head -n1)
setdelta() {
sxmo_setpinebacklight "$(
xargs -IB echo B "$1" < $DEV/brightness |
xargs -IB echo B "$1" < $BACKLIGHT/brightness |
bc |
xargs -INUM echo -e "$MIN\nNUM" | sort -n | tail -n1 |
xargs -INUM echo -e "$MAX\nNUM" | sort -n | head -n1
)"
dunstify -i 0 -u normal -r 999 "☀ $(cat $DEV/brightness)/${MAX}"
dunstify -i 0 -u normal -r 999 "☀ $(cat $BACKLIGHT/brightness)/${MAX}"
}
up() {