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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/display/arm,hdlcd.txt | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/display/arm,hdlcd.txt')
-rw-r--r-- | Documentation/devicetree/bindings/display/arm,hdlcd.txt | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/arm,hdlcd.txt b/Documentation/devicetree/bindings/display/arm,hdlcd.txt new file mode 100644 index 000000000..78bc24296 --- /dev/null +++ b/Documentation/devicetree/bindings/display/arm,hdlcd.txt @@ -0,0 +1,79 @@ +ARM HDLCD + +This is a display controller found on several development platforms produced +by ARM Ltd and in more modern of its' Fast Models. The HDLCD is an RGB +streamer that reads the data from a framebuffer and sends it to a single +digital encoder (DVI or HDMI). + +Required properties: + - compatible: "arm,hdlcd" + - reg: Physical base address and length of the controller's registers. + - interrupts: One interrupt used by the display controller to notify the + interrupt controller when any of the interrupt sources programmed in + the interrupt mask register have activated. + - clocks: A list of phandle + clock-specifier pairs, one for each + entry in 'clock-names'. + - clock-names: A list of clock names. For HDLCD it should contain: + - "pxlclk" for the clock feeding the output PLL of the controller. + +Required sub-nodes: + - port: The HDLCD connection to an encoder chip. The connection is modeled + using the OF graph bindings specified in + Documentation/devicetree/bindings/graph.txt. + +Optional properties: + - memory-region: phandle to a node describing memory (see + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) to be + used for the framebuffer; if not present, the framebuffer may be located + anywhere in memory. + + +Example: + +/ { + ... + + hdlcd@2b000000 { + compatible = "arm,hdlcd"; + reg = <0 0x2b000000 0 0x1000>; + interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&oscclk5>; + clock-names = "pxlclk"; + port { + hdlcd_output: endpoint@0 { + remote-endpoint = <&hdmi_enc_input>; + }; + }; + }; + + /* HDMI encoder on I2C bus */ + i2c@7ffa0000 { + .... + hdmi-transmitter@70 { + compatible = "....."; + reg = <0x70>; + port@0 { + hdmi_enc_input: endpoint { + remote-endpoint = <&hdlcd_output>; + }; + + hdmi_enc_output: endpoint { + remote-endpoint = <&hdmi_1_port>; + }; + }; + }; + + }; + + hdmi1: connector@1 { + compatible = "hdmi-connector"; + type = "a"; + port { + hdmi_1_port: endpoint { + remote-endpoint = <&hdmi_enc_output>; + }; + }; + }; + + ... +}; |