[PATCH v2 1/2] dt-bindings: display: bridge: ldb: Implement simple NXP i.MX8M LDB bridge

* [PATCH v2 1/2] dt-bindings: display: bridge: ldb: Implement simple NXP i.MX8M LDB bridge
@ 2022-04-18 14:51 ` Marek Vasut
  0 siblings, 0 replies; 10+ messages in thread
From: Marek Vasut @ 2022-04-18 14:51 UTC (permalink / raw)
  To: dri-devel
  Cc: Marek Vasut, devicetree, Peng Fan, Robert Foss, Rob Herring,
	Laurent Pinchart, Thomas Zimmermann, Sam Ravnborg, Robby Cai,
	Maxime Ripard

The i.MX8MP contains two syscon registers which are responsible
for configuring the on-SoC DPI-to-LVDS serializer. Add DT binding
which represents this serializer as a bridge.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Robby Cai <robby.cai@nxp.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: devicetree@vger.kernel.org
To: dri-devel@lists.freedesktop.org
---
V2: - Consistently use fsl,imx8mp-ldb as compatible
    - Drop items: from compatible:
    - Replace minItems with maxItems in clocks:
    - Drop quotes from clock-names const: ldb
    - Rename syscon to fsl,syscon
    - Use generic name of ldb-lvds in example
---
 .../bindings/display/bridge/nxp,ldb.yaml      | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/nxp,ldb.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/nxp,ldb.yaml b/Documentation/devicetree/bindings/display/bridge/nxp,ldb.yaml
new file mode 100644
index 0000000000000..f3182566eb316
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/nxp,ldb.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/nxp,ldb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX8M DPI to LVDS bridge chip
+
+maintainers:
+  - Marek Vasut <marex@denx.de>
+
+description: |
+  The i.MX8MP contains two syscon registers which are responsible
+  for configuring the on-SoC DPI-to-LVDS serializer. This describes
+  those registers as bridge within the DT.
+
+properties:
+  compatible:
+    const: fsl,imx8mp-ldb
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: ldb
+
+  fsl,syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: A phandle to media block controller.
+
+  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 LVDS Channel-A output (panel or bridge).
+
+      port@2:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for LVDS Channel-B output (panel or bridge).
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - clocks
+  - fsl,syscon
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mp-clock.h>
+
+    bridge {
+        compatible = "fsl,imx8mp-ldb";
+        clocks = <&clk IMX8MP_CLK_MEDIA_LDB>;
+        clock-names = "ldb";
+        fsl,syscon = <&media_blk_ctrl>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+
+                ldb_from_lcdif2: endpoint {
+                    remote-endpoint = <&lcdif2_to_ldb>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+
+                ldb_lvds_ch0: endpoint {
+                    remote-endpoint = <&ldb_to_lvdsx4panel>;
+                };
+            };
+
+            port@2 {
+                reg = <2>;
+
+                ldb_lvds_ch1: endpoint {
+                };
+            };
+        };
+    };
-- 
2.35.1


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