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79 lines
2.0 KiB
79 lines
2.0 KiB
ARM HDLCD |
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This is a display controller found on several development platforms produced |
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by ARM Ltd and in more modern of its' Fast Models. The HDLCD is an RGB |
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streamer that reads the data from a framebuffer and sends it to a single |
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digital encoder (DVI or HDMI). |
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Required properties: |
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- compatible: "arm,hdlcd" |
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- reg: Physical base address and length of the controller's registers. |
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- interrupts: One interrupt used by the display controller to notify the |
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interrupt controller when any of the interrupt sources programmed in |
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the interrupt mask register have activated. |
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- clocks: A list of phandle + clock-specifier pairs, one for each |
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entry in 'clock-names'. |
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- clock-names: A list of clock names. For HDLCD it should contain: |
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- "pxlclk" for the clock feeding the output PLL of the controller. |
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Required sub-nodes: |
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- port: The HDLCD connection to an encoder chip. The connection is modeled |
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using the OF graph bindings specified in |
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Documentation/devicetree/bindings/graph.txt. |
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Optional properties: |
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- memory-region: phandle to a node describing memory (see |
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Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) to be |
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used for the framebuffer; if not present, the framebuffer may be located |
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anywhere in memory. |
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Example: |
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/ { |
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... |
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hdlcd@2b000000 { |
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compatible = "arm,hdlcd"; |
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reg = <0 0x2b000000 0 0x1000>; |
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interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>; |
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clocks = <&oscclk5>; |
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clock-names = "pxlclk"; |
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port { |
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hdlcd_output: endpoint@0 { |
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remote-endpoint = <&hdmi_enc_input>; |
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}; |
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}; |
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}; |
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/* HDMI encoder on I2C bus */ |
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i2c@7ffa0000 { |
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.... |
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hdmi-transmitter@70 { |
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compatible = "....."; |
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reg = <0x70>; |
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port@0 { |
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hdmi_enc_input: endpoint { |
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remote-endpoint = <&hdlcd_output>; |
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}; |
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hdmi_enc_output: endpoint { |
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remote-endpoint = <&hdmi_1_port>; |
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}; |
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}; |
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}; |
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}; |
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hdmi1: connector@1 { |
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compatible = "hdmi-connector"; |
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type = "a"; |
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port { |
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hdmi_1_port: endpoint { |
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remote-endpoint = <&hdmi_enc_output>; |
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}; |
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}; |
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}; |
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... |
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};
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