PER_DISPLAY_MAX_BRIGHTNESS
What it is
Property to represent max brightness of the displays which are controlled separately.
This is only used if PER_DISPLAY_BRIGHTNESS is supported.
The display port uniquely identifies a physical connector on the device for display output, ranging from 0 to 255.
int32Values[0] : display port number int32Values[1] : max brightness for display port number specified at int32Values[0] int32Values[2] : display port number int32Values[3] : max brightness for display port number specified at int32Values[2] ...
How the ID is built
A property ID is a 32-bit value packing four fields. Reading 0x11410f4e apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00410000 | INT32_VEC |
| Ordinal | 0x0000ffff | 0x00000f4e | 0xf4e |
Reading it from an app
This property is defined in the HAL but is not exposed as a constant in android.car.VehiclePropertyIds, so it is not reachable through CarPropertyManager from an ordinary app. It is used by the platform, or by vendor code running with system privileges.