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91 lines
2.2 KiB
91 lines
2.2 KiB
Drivers for the second video output of the GE B850v3: |
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STDP4028-ge-b850v3-fw bridges (LVDS-DP) |
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STDP2690-ge-b850v3-fw bridges (DP-DP++) |
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The video processing pipeline on the second output on the GE B850v3: |
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Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output |
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Each bridge has a dedicated flash containing firmware for supporting the custom |
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design. The result is that, in this design, neither the STDP4028 nor the |
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STDP2690 behave as the stock bridges would. The compatible strings include the |
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suffix "-ge-b850v3-fw" to make it clear that the driver is for the bridges with |
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the firmware specific for the GE B850v3. |
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The hardware do not provide control over the video processing pipeline, as the |
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two bridges behaves as a single one. The only interfaces exposed by the |
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hardware are EDID, HPD, and interrupts. |
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stdp4028-ge-b850v3-fw required properties: |
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- compatible : "megachips,stdp4028-ge-b850v3-fw" |
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- reg : I2C bus address |
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- interrupts : one interrupt should be described here, as in |
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<0 IRQ_TYPE_LEVEL_HIGH> |
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- ports : One input port(reg = <0>) and one output port(reg = <1>) |
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stdp2690-ge-b850v3-fw required properties: |
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compatible : "megachips,stdp2690-ge-b850v3-fw" |
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- reg : I2C bus address |
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- ports : One input port(reg = <0>) and one output port(reg = <1>) |
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Example: |
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&mux2_i2c2 { |
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clock-frequency = <100000>; |
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stdp4028@73 { |
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compatible = "megachips,stdp4028-ge-b850v3-fw"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <0x73>; |
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interrupt-parent = <&gpio2>; |
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interrupts = <0 IRQ_TYPE_LEVEL_HIGH>; |
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ports { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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port@0 { |
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reg = <0>; |
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stdp4028_in: endpoint { |
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remote-endpoint = <&lvds0_out>; |
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}; |
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}; |
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port@1 { |
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reg = <1>; |
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stdp4028_out: endpoint { |
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remote-endpoint = <&stdp2690_in>; |
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}; |
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}; |
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}; |
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}; |
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stdp2690@72 { |
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compatible = "megachips,stdp2690-ge-b850v3-fw"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <0x72>; |
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ports { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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port@0 { |
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reg = <0>; |
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stdp2690_in: endpoint { |
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remote-endpoint = <&stdp4028_out>; |
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}; |
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}; |
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port@1 { |
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reg = <1>; |
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stdp2690_out: endpoint { |
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/* Connector for external display */ |
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}; |
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}; |
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}; |
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}; |
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};
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