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Add DT bindings documentation for the Mali Display Processor. The bindings describe the Mali DP500, DP550 and DP650 processors from ARM Ltd. Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Acked-by: Rob Herring <robh@kernel.org>
66 lines
2.2 KiB
Plaintext
66 lines
2.2 KiB
Plaintext
ARM Mali-DP
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The following bindings apply to a family of Display Processors sold as
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licensable IP by ARM Ltd. The bindings describe the Mali DP500, DP550 and
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DP650 processors that offer multiple composition layers, support for
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rotation and scaling output.
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Required properties:
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- compatible: should be one of
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"arm,mali-dp500"
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"arm,mali-dp550"
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"arm,mali-dp650"
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depending on the particular implementation present in the hardware
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- reg: Physical base address and size of the block of registers used by
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the processor.
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- interrupts: Interrupt list, as defined in ../interrupt-controller/interrupts.txt,
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interrupt client nodes.
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- interrupt-names: name of the engine inside the processor that will
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use the corresponding interrupt. Should be one of "DE" or "SE".
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- clocks: A list of phandle + clock-specifier pairs, one for each entry
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in 'clock-names'
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- clock-names: A list of clock names. It should contain:
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- "pclk": for the APB interface clock
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- "aclk": for the AXI interface clock
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- "mclk": for the main processor clock
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- "pxlclk": for the pixel clock feeding the output PLL of the processor.
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- arm,malidp-output-port-lines: Array of u8 values describing the number
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of output lines per channel (R, G and B).
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Required sub-nodes:
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- port: The Mali DP connection to an encoder input port. The connection
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is modelled 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)
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to be used for the framebuffer; if not present, the framebuffer may
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be located anywhere in memory.
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Example:
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/ {
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...
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dp0: malidp@6f200000 {
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compatible = "arm,mali-dp650";
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reg = <0 0x6f200000 0 0x20000>;
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memory-region = <&display_reserved>;
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interrupts = <0 168 IRQ_TYPE_LEVEL_HIGH>,
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<0 168 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "DE", "SE";
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clocks = <&oscclk2>, <&fpgaosc0>, <&fpgaosc1>, <&fpgaosc1>;
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clock-names = "pxlclk", "mclk", "aclk", "pclk";
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arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
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port {
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dp0_output: endpoint {
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remote-endpoint = <&tda998x_2_input>;
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};
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};
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};
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...
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};
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