linux-kernel - [PATCH 1/2] dt-bindings: display: bridge: ldb: Implement simple Freescale i.MX91/93 DPI bridge

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Message-Id: <20250211084119.849324-2-alexander.stein@ew.tq-group.com>
Date: Tue, 11 Feb 2025 09:41:18 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	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>,
	Alexander Stein <alexander.stein@...tq-group.com>
Cc: dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: display: bridge: ldb: Implement simple Freescale i.MX91/93 DPI bridge

The i.MX91/93 contains a single syscon registers which is responsible
for configuring DPI output format. Add DT binding which represents
this configuration as a bridge.

Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
---
 .../bridge/fsl,imx9-parallel-disp-fmt.yaml    | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx9-parallel-disp-fmt.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,imx9-parallel-disp-fmt.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,imx9-parallel-disp-fmt.yaml
new file mode 100644
index 0000000000000..54cb73b59b1eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/fsl,imx9-parallel-disp-fmt.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/fsl,imx9-parallel-disp-fmt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX91/93 DPI bridge
+
+maintainers:
+  - Alexander Stein <alexander.stein@...tq-group.com>
+
+description: |
+  The i.MX91/93 mediamix contains a single register which is responsible
+  for configuring the parallel display output format. This describes
+  this registers as bridge within the DT.
+
+properties:
+  compatible:
+    const: fsl,imx9-parallel-display-format
+
+  reg:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for DPI input.
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for DPI output (panel or bridge).
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    blk-ctrl {
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        bridge@60 {
+            compatible = "fsl,imx9-parallel-display-format";
+            reg = <0x60 0x4>;
+            status = "disabled";
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+
+                    dpi_from_lcdif: endpoint {
+                        remote-endpoint = <&lcdif_to_dpi>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+
+                    dpi_out: endpoint {
+                    };
+                };
+            };
+        };
+    };
-- 
2.34.1