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amdgpu: limit fan speed

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This commit is contained in:
Leonardo Eugênio 2025-03-12 11:38:39 -03:00
parent fac1976c9c
commit 6e5eebe3c1
2 changed files with 30 additions and 5 deletions
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2
hosts/monolith/amdgpu.nix
View file

@ -18,7 +18,7 @@ in
systemd.services.amd-fan-control = { systemd.services.amd-fan-control = {
script = '' script = ''
${lib.getExe pkgs.amd-fan-control} /sys/class/drm/card1/device 60 85 ${lib.getExe pkgs.amd-fan-control} /sys/class/drm/card1/device 60 90 0 80
''; '';
serviceConfig = { serviceConfig = {
Restart = "always"; Restart = "always";

33
scripts/amd-fan-control
View file

@ -39,10 +39,31 @@ if [ -z "$TEMP_MAX" ];then
bail "No maximum temperature provided" bail "No maximum temperature provided"
fi fi
PWM_MIN=0 PWM_MIN_PCT="$4"
PWM_MAX=255 PWM_MAX_PCT="$5"
if [ -z "$PWM_MIN_PCT" ];then
bail "No minimum fan speed % not provided"
fi
if [ -z "$PWM_MAX_PCT" ];then
bail "No maximum fan speed % not provided"
fi
PWM_MIN="$(( $PWM_MIN_PCT * 255 / 100))"
PWM_MAX="$(( $PWM_MAX_PCT * 255 / 100))"
echo "Running..." >&2 echo "Running..." >&2
echo "TEMP_MIN=$TEMP_MIN°C"
echo "TEMP_MAX=$TEMP_MAX°C"
echo "FAN_MIN=$PWM_MIN_PCT%"
echo "FAN_MAX=$PWM_MAX_PCT%"
echo 1 > "$HWMON/pwm1_enable"
PREV=0
while true; do while true; do
TEMPERATURE_RAW=$(cat "$TEMP_INPUT") TEMPERATURE_RAW=$(cat "$TEMP_INPUT")
TEMPERATURE="$(( $TEMPERATURE_RAW / 1000 ))" TEMPERATURE="$(( $TEMPERATURE_RAW / 1000 ))"
@ -55,7 +76,11 @@ while true; do
PWM=$PWM_MIN PWM=$PWM_MIN
fi fi
echo 1 > "$HWMON/pwm1_enable" AVG="$(( ($PWM * 20 + $PREV * 80) / 100 ))"
echo "$PWM" > "$HWMON/pwm1"
echo "$AVG"
echo "$AVG" > "$HWMON/pwm1"
PREV="$AVG"
sleep .1s sleep .1s
done done