linux-kernel - [PATCH v5 4/9] dt-bindings: display: imx: Add i.MX94 DCIF

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Message-Id: <20250911-dcif-upstreaming-v5-4-a1e8dab8ae40@oss.nxp.com>
Date: Thu, 11 Sep 2025 14:37:04 +0300
From: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
To: imx@...ts.linux.dev,
	Laurentiu Palcu <laurentiu.palcu@....nxp.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>
Cc: dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v5 4/9] dt-bindings: display: imx: Add i.MX94 DCIF

DCIF is the i.MX94 Display Controller Interface which is used to
drive a TFT LCD panel or connects to a display interface depending
on the chip configuration.

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
---
 .../bindings/display/imx/nxp,imx94-dcif.yaml       | 82 ++++++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/imx/nxp,imx94-dcif.yaml b/Documentation/devicetree/bindings/display/imx/nxp,imx94-dcif.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..fb25300e25529699adeb4caad9837d7af23a3581
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/imx/nxp,imx94-dcif.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2025 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/nxp,imx94-dcif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX94 Display Control Interface (DCIF)
+
+maintainers:
+  - Laurentiu Palcu <laurentiu.palcu@....nxp.com>
+
+description:
+  The Display Control Interface(DCIF) is a system master that fetches graphics
+  stored in memory and displays them on a TFT LCD panel or connects to a
+  display interface depending on the chip configuration.
+
+properties:
+  compatible:
+    const: nxp,imx94-dcif
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: CPU domain 0 (controlled by common registers group).
+      - description: CPU domain 1 (controlled by background layer registers group).
+      - description: CPU domain 2 (controlled by foreground layer registers group).
+
+  interrupt-names:
+    items:
+      - const: common
+      - const: bg_layer
+      - const: fg_layer
+
+  clocks:
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: apb
+      - const: axi
+      - const: pix
+
+  power-domains:
+    maxItems: 1
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: Display Pixel Interface(DPI) output port
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    display-controller@...20000 {
+        compatible = "nxp,imx94-dcif";
+        reg = <0x4b120000 0x300000>;
+        interrupts = <GIC_SPI 377 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 378 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 379 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "common", "bg_layer", "fg_layer";
+        clocks = <&scmi_clk 69>, <&scmi_clk 70>, <&dispmix_csr 0>;
+        clock-names = "apb", "axi", "pix";
+        assigned-clocks = <&dispmix_csr 0>;
+        assigned-clock-parents = <&ldb_pll_pixel>;
+        power-domains = <&scmi_devpd 11>;
+        port {
+            dcif_out: endpoint {
+                remote-endpoint = <&ldb_in>;
+            };
+        };
+    };

-- 
2.49.0