sysfs Interface
To get the current Backlight Enable State
cat /sys/class/backlight/adl-bmc-bklight/bl_power
To Set the current Backlight Enable State to either ON / OFF
echo > /sys/class/backlight/adl-bmc-bklight/bl_power
For Example,
To enable the backlight: $ echo 1 > /sys/class/backlight/adl-bmc-bklight/bl_power
To Disable the backlight: $ echo 0 > /sys/class/backlight/adl-bmc-bklight/bl_power
To get the current Backlight Brightness level
cat /sys/class/backlight/adl-bmc-bklight/actual_brightness
To Set the current Backlight brightness level
echo > /sys/class/backlight/adl-bmc-bklight/brightness
For Example, to set the brightness level of 78: $ echo 78 > /sys/class/backlight/adl-bmc-bklight/brightness
SEMA EAPI (Both Windows & Linux supported)
uint32_t EApiVgaGetBacklightEnable(uint32_t PanelId, uint32_t *pEnable) |
Description
Returns current Backlight status for specified Flat Panel
Parameters:
- uint32_t PanelId: Select Backlight IDs as the first parameter
| ID | Description |
|---|---|
| EAPI_ID_BACKLIGHT_1 | Backlight Local Flat Panel 1 |
- uint32_t *pEnable: indicate the status for on/off
| ID | Description |
|---|---|
| EAPI_BACKLIGHT_SET_ON | Requests/Signifies that the backlight is enabled |
| EAPI_BACKLIGHT_SET_OFF | Requests/Signifies that the backlight is disabled |
uint32_t EApiVgaSetBacklightEnable(uint32_t PanelId, uint32_t Enable) |
Description
Set the enable status for specified Flat Panel
Parameters:
- uint32_t PanelId: select ID or code name as the first parameter
| ID | Description |
|---|---|
| EAPI_ID_BACKLIGHT_1 | Backlight Local Flat Panel 1 |
- uint32_t Enable: select ID for Backlight Enable Values
| ID | Description |
|---|---|
| EAPI_BACKLIGHT_SET_ON | Requests/Signifies that the backlight is enabled |
| EAPI_BACKLIGHT_SET_OFF | Requests/Signifies that the backlight is disabled |
uint32_t EApiVgaGetBacklightBrightness(uint32_t PanelId, uint32_t *pBright) |
Description
Get the current the value of brightness
Parameters:
- uint32_t PanelId: select ID or code name as the first parameter
| ID | Description |
|---|---|
| EAPI_ID_BACKLIGHT_1 | Backlight Local Flat Panel 1 |
- uint32_t *pBright: the pointer to a buffer that receives the current backlight brightness level.
uint32_t EApiVgaSetBacklightBrightness(uint32_t PanelId, uint32_t Bright) |
Description
Set the current the value of brightness
Parameters:
- uint32_t PanelId: select ID or code name as the first parameter
| ID | Description |
|---|---|
| EAPI_ID_BACKLIGHT_1 | Backlight Local Flat Panel 1 |
- uint32_t Bright: configure backlight Brightness level and maximum level goes to 255