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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright 2019 NXP
%YAML 1.2
---
$id: "http://devicetree.org/schemas/display/imx/nxp,imx8mq-dcss.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: iMX8MQ Display Controller Subsystem (DCSS)
maintainers:
- Laurentiu Palcu <laurentiu.palcu@nxp.com>
description:
The DCSS (display controller sub system) is used to source up to three
display buffers, compose them, and drive a display using HDMI 2.0a(with HDCP
2.2) or MIPI-DSI. The DCSS is intended to support up to 4kp60 displays. HDR10
image processing capabilities are included to provide a solution capable of
driving next generation high dynamic range displays.
properties:
compatible:
const: nxp,imx8mq-dcss
reg:
items:
- description: DCSS base address and size, up to IRQ steer start
- description: DCSS BLKCTL base address and size
interrupts:
items:
- description: Context loader completion and error interrupt
- description: DTG interrupt used to signal context loader trigger time
- description: DTG interrupt for Vblank
interrupt-names:
items:
- const: ctxld
- const: ctxld_kick
- const: vblank
clocks:
items:
- description: Display APB clock for all peripheral PIO access interfaces
- description: Display AXI clock needed by DPR, Scaler, RTRAM_CTRL
- description: RTRAM clock
- description: Pixel clock, can be driven either by HDMI phy clock or MIPI
- description: DTRC clock, needed by video decompressor
clock-names:
items:
- const: apb
- const: axi
- const: rtrm
- const: pix
- const: dtrc
assigned-clocks:
items:
- description: Phandle and clock specifier of IMX8MQ_CLK_DISP_AXI_ROOT
- description: Phandle and clock specifier of IMX8MQ_CLK_DISP_RTRM
- description: Phandle and clock specifier of either IMX8MQ_VIDEO2_PLL1_REF_SEL or
IMX8MQ_VIDEO_PLL1_REF_SEL
assigned-clock-parents:
items:
- description: Phandle and clock specifier of IMX8MQ_SYS1_PLL_800M
- description: Phandle and clock specifier of IMX8MQ_SYS1_PLL_800M
- description: Phandle and clock specifier of IMX8MQ_CLK_27M
assigned-clock-rates:
items:
- description: Must be 800 MHz
- description: Must be 400 MHz
port:
$ref: /schemas/graph.yaml#/properties/port
description:
A port node pointing to the input port of a HDMI/DP or MIPI display bridge.
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/imx8mq-clock.h>
dcss: display-controller@32e00000 {
compatible = "nxp,imx8mq-dcss";
reg = <0x32e00000 0x2d000>, <0x32e2f000 0x1000>;
interrupts = <6>, <8>, <9>;
interrupt-names = "ctxld", "ctxld_kick", "vblank";
interrupt-parent = <&irqsteer>;
clocks = <&clk IMX8MQ_CLK_DISP_APB_ROOT>, <&clk IMX8MQ_CLK_DISP_AXI_ROOT>,
<&clk IMX8MQ_CLK_DISP_RTRM_ROOT>, <&clk IMX8MQ_VIDEO2_PLL_OUT>,
<&clk IMX8MQ_CLK_DISP_DTRC>;
clock-names = "apb", "axi", "rtrm", "pix", "dtrc";
assigned-clocks = <&clk IMX8MQ_CLK_DISP_AXI>, <&clk IMX8MQ_CLK_DISP_RTRM>,
<&clk IMX8MQ_VIDEO2_PLL1_REF_SEL>;
assigned-clock-parents = <&clk IMX8MQ_SYS1_PLL_800M>, <&clk IMX8MQ_SYS1_PLL_800M>,
<&clk IMX8MQ_CLK_27M>;
assigned-clock-rates = <800000000>,
<400000000>;
port {
dcss_out: endpoint {
remote-endpoint = <&hdmi_in>;
};
};
};
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