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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>
41 lines
1.2 KiB
Plaintext
41 lines
1.2 KiB
Plaintext
Intel GMA Bindings
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==================
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This is the Intel Graphics Media Accelerator. This binding supports selection
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of display parameters only.
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Required properties:
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- compatible : "intel,gma";
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Optional properties:
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- intel,dp-hotplug : values for digital port hotplug, one cell per value for
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ports B, C and D
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- intel,panel-port-select : output port to use: 0=LVDS 1=DP_B 2=DP_C 3=DP_D
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- intel,panel-power-cycle-delay : T4 time sequence (6 = 500ms)
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The following delays are in units of 0.1ms:
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- intel,panel-power-up-delay : T1+T2 time sequence
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- intel,panel-power-down-delay : T3 time sequence
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- intel,panel-power-backlight-on-delay : T5 time sequence
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- intel,panel-power-backlight-off-delay : Tx time sequence
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- intel,cpu-backlight : Value for CPU Backlight PWM
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- intel,pch-backlight : Value for PCH Backlight PWM
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Example
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-------
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gma {
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compatible = "intel,gma";
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intel,dp_hotplug = <0 0 0x06>;
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intel,panel-port-select = <1>;
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intel,panel-power-cycle-delay = <6>;
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intel,panel-power-up-delay = <2000>;
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intel,panel-power-down-delay = <500>;
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intel,panel-power-backlight-on-delay = <2000>;
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intel,panel-power-backlight-off-delay = <2000>;
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intel,cpu-backlight = <0x00000200>;
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intel,pch-backlight = <0x04000000>;
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};
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