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kvm
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chore: use constant for backlight control file

This commit is contained in:
Cameron Fleming 2025-01-04 22:22:06 +00:00
parent f4d88c7162
commit db4c0c7136
1 changed files with 6 additions and 2 deletions
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8
display.go
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@ -13,6 +13,10 @@ var currentScreen = "ui_Boot_Screen"
var lastWakeTime = time.Now()
var backlightState = 0 // 0 - NORMAL, 1 - DIMMED, 2 - OFF
const (
BACKLIGHT_CONTROL_CLASS string = "/sys/class/backlight/backlight/brightness"
)
func switchToScreen(screen string) {
_, err := CallCtrlAction("lv_scr_load", map[string]interface{}{"obj": screen})
if err != nil {
@ -97,13 +101,13 @@ func setDisplayBrightness(brightness int) error {
}
// Check the display backlight class is available
if _, err := os.Stat("/sys/class/backlight/backlight/brightness"); errors.Is(err, os.ErrNotExist) {
if _, err := os.Stat(BACKLIGHT_CONTROL_CLASS); errors.Is(err, os.ErrNotExist) {
return errors.New("brightness value cannot be set, possibly not running on JetKVM hardware.")
}
// Set the value
bs := []byte(strconv.Itoa(brightness))
err := os.WriteFile("/sys/class/backlight/backlight/brightness", bs, 0644)
err := os.WriteFile(BACKLIGHT_CONTROL_CLASS, bs, 0644)
if err != nil {
return err
}