doc/device-tree-bindings/video/intel-gma.txt

   1 Intel GMA Bindings
   2 ==================
   3
   4 This is the Intel Graphics Media Accelerator. This binding supports selection
   5 of display parameters only.
   6
   7
   8 Required properties:
   9  - compatible : "intel,gma";
  10
  11 Optional properties:
  12  - intel,dp-hotplug : values for digital port hotplug, one cell per value for
  13      ports B, C and D
  14   - intel,panel-port-select : output port to use: 0=LVDS 1=DP_B 2=DP_C 3=DP_D
  15   - intel,panel-power-cycle-delay : T4 time sequence (6 = 500ms)
  16
  17   The following delays are in units of 0.1ms:
  18   - intel,panel-power-up-delay : T1+T2 time sequence
  19   - intel,panel-power-down-delay : T3 time sequence
  20   - intel,panel-power-backlight-on-delay : T5 time sequence
  21   - intel,panel-power-backlight-off-delay : Tx time sequence
  22
  23   - intel,cpu-backlight : Value for CPU Backlight PWM
  24   - intel,pch-backlight : Value for PCH Backlight PWM
  25
  26 Example
  27 -------
  28
  29 gma {
  30         compatible = "intel,gma";
  31         intel,dp_hotplug = <0 0 0x06>;
  32         intel,panel-port-select = <1>;
  33         intel,panel-power-cycle-delay = <6>;
  34         intel,panel-power-up-delay = <2000>;
  35         intel,panel-power-down-delay = <500>;
  36         intel,panel-power-backlight-on-delay = <2000>;
  37         intel,panel-power-backlight-off-delay = <2000>;
  38         intel,cpu-backlight = <0x00000200>;
  39         intel,pch-backlight = <0x04000000>;
  40 };