mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
effcf067df
Intel's Graphics Media Accelerator (GMA) is a generic name for a wide range of video devices. Add code to set up the hardware on ivybridge. Part of the init happens in native code, part of it happens in a 16-bit option ROM for those nostalgic for the 1970s. Signed-off-by: Simon Glass <sjg@chromium.org>
40 lines
1.2 KiB
Text
40 lines
1.2 KiB
Text
Intel GMA Bindings
|
|
==================
|
|
|
|
This is the Intel Graphics Media Accelerator. This binding supports selection
|
|
of display parameters only.
|
|
|
|
|
|
Required properties:
|
|
- compatible : "intel,gma";
|
|
|
|
Optional properties:
|
|
- intel,dp-hotplug : values for digital port hotplug, one cell per value for
|
|
ports B, C and D
|
|
- intel,panel-port-select : output port to use: 0=LVDS 1=DP_B 2=DP_C 3=DP_D
|
|
- intel,panel-power-cycle-delay : T4 time sequence (6 = 500ms)
|
|
|
|
The following delays are in units of 0.1ms:
|
|
- intel,panel-power-up-delay : T1+T2 time sequence
|
|
- intel,panel-power-down-delay : T3 time sequence
|
|
- intel,panel-power-backlight-on-delay : T5 time sequence
|
|
- intel,panel-power-backlight-off-delay : Tx time sequence
|
|
|
|
- intel,cpu-backlight : Value for CPU Backlight PWM
|
|
- intel,pch-backlight : Value for PCH Backlight PWM
|
|
|
|
Example
|
|
-------
|
|
|
|
gma {
|
|
compatible = "intel,gma";
|
|
intel,dp_hotplug = <0 0 0x06>;
|
|
intel,panel-port-select = <1>;
|
|
intel,panel-power-cycle-delay = <6>;
|
|
intel,panel-power-up-delay = <2000>;
|
|
intel,panel-power-down-delay = <500>;
|
|
intel,panel-power-backlight-on-delay = <2000>;
|
|
intel,panel-power-backlight-off-delay = <2000>;
|
|
intel,cpu-backlight = <0x00000200>;
|
|
intel,pch-backlight = <0x04000000>;
|
|
};
|