mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
a6356f9302
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> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
80 lines
2.0 KiB
Plaintext
80 lines
2.0 KiB
Plaintext
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>;
|
|
};
|
|
};
|
|
};
|
|
|
|
...
|
|
};
|