[PATCH v16 1/3] media: dt-bindings: Add CSI Pixel Formatter DT bindings

From: Guoniu Zhou <[email protected]>

The i.MX95 CSI pixel formatting module uses packet info, pixel and
non-pixel data from the CSI-2 host controller and reformat them to
match Pixel Link(PL) definition.

Signed-off-by: Guoniu Zhou <[email protected]>
Reviewed-by: Frank Li <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
---
Changes in v14:
- Add Rb tag from Laurent pinchart

Changes in v11:
- Add Rb tags from Frank Li and Krzysztof Kozlowski

Changes in v10:
- Drop syscon parent node from example
- Drop Reviewed-by tags from Frank and Krzysztof due to binding changes
- Add description for reg property
- Add space after formatter@20 before opening brace in example
- Enhance the port description with more detailed information
- Delete the blank line immediately following the endpoint in example

Changes in v9:
- Use direct node instead of syscon wrapper in example

Changes in v8:
- Use standard port reference instead of video-interfaces.yaml
- Add parent syscon node in example to show device integration
- Add required constraints for port@0 and port@1 in ports node

Changes in v7:
- Change compatible to imx95-csi-formatter as IP is i.MX95 specific per Marco's suggestion
  Link: https://lore.kernel.org/linux-media/[email protected]/T/#mcd135b3de179b3cb69daa1fd6e0e8e27c85b3332
---
 .../bindings/media/fsl,imx95-csi-formatter.yaml    | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.yaml b/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.yaml
new file mode 100644
index 000000000000..58c4e1cc056b
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/fsl,imx95-csi-formatter.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX95 CSI Pixel Formatter
+
+maintainers:
+  - Guoniu Zhou <[email protected]>
+
+description:
+  The CSI pixel formatting module found on i.MX95 uses packet info, pixel
+  and non-pixel data from the CSI-2 host controller and reformat them to
+  match Pixel Link(PL) definition.
+
+properties:
+  compatible:
+    const: fsl,imx95-csi-formatter
+
+  reg:
+    maxItems: 1
+    description: Register offset and size within the parent syscon
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          Input port, connects to MIPI CSI-2 receiver output (IDI interface)
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          Output port, connects to ISI input via Pixel Link (PL)
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/nxp,imx95-clock.h>
+
+    formatter@20 {
+        compatible = "fsl,imx95-csi-formatter";
+        reg = <0x20 0x100>;
+        clocks = <&cameramix_csr IMX95_CLK_CAMBLK_CSI2_FOR0>;
+        power-domains = <&scmi_devpd 3>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+
+                endpoint {
+                    remote-endpoint = <&mipi_csi_0_out>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+
+                endpoint {
+                    remote-endpoint = <&isi_in_2>;
+                };
+            };
+        };
+    };

-- 
2.34.1