linux-kernel - [PATCH v3 1/4] dt-bindings: display: bridge: add sam9x75-mipi-dsi binding

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Message-ID: <20240814105256.177319-2-manikandan.m@microchip.com>
Date: Wed, 14 Aug 2024 16:22:53 +0530
From: Manikandan Muralidharan <manikandan.m@...rochip.com>
To: <andrzej.hajda@...el.com>, <neil.armstrong@...aro.org>,
	<rfoss@...nel.org>, <Laurent.pinchart@...asonboard.com>, <jonas@...boo.se>,
	<jernej.skrabec@...il.com>, <airlied@...il.com>, <daniel@...ll.ch>,
	<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
	<tzimmermann@...e.de>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <linux@...linux.org.uk>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <arnd@...db.de>, <geert+renesas@...der.be>,
	<mpe@...erman.id.au>, <rdunlap@...radead.org>, <dharma.b@...rochip.com>,
	<dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
CC: <manikandan.m@...rochip.com>
Subject: [PATCH v3 1/4] dt-bindings: display: bridge: add sam9x75-mipi-dsi binding

Add the 'sam9x75-mipi-dsi' compatible binding, which describes the
Microchip's specific wrapper for the Synopsys DesignWare MIPI DSI HOST
Controller for the sam9x75 series System-on-Chip (SoC) devices.

Signed-off-by: Manikandan Muralidharan <manikandan.m@...rochip.com>
---
changes in v3:
- Describe the clocks used

changes in v2:
- List the clocks with description
- remove describing 'remove-endpoint' properties
- remove unused label, node and fix example DT indentation
- cosmetic fixes
---
 .../bridge/microchip,sam9x75-mipi-dsi.yaml    | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-mipi-dsi.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-mipi-dsi.yaml b/Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-mipi-dsi.yaml
new file mode 100644
index 000000000000..3c86f0cd49e9
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-mipi-dsi.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/microchip,sam9x75-mipi-dsi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip SAM9X75 MIPI DSI Controller
+
+maintainers:
+  - Manikandan Muralidharan <manikandan.m@...rochip.com>
+
+description:
+  Microchip specific extensions or wrapper to the Synopsys Designware MIPI DSI.
+  The MIPI Display Serial Interface (DSI) Host Controller implements all
+  protocol functions defined in the MIPI DSI Specification.The DSI Host
+  provides an interface between the LCD Controller (LCDC) and the MIPI D-PHY,
+  allowing communication with a DSI-compliant display.
+
+allOf:
+  - $ref: /schemas/display/dsi-controller.yaml#
+
+properties:
+  compatible:
+    const: microchip,sam9x75-mipi-dsi
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description:
+          Peripheral Bus Clock between LCDC and MIPI DPHY
+      - description:
+          MIPI DPHY Interface reference clock for PLL block
+
+  clock-names:
+    items:
+      - const: pclk
+      - const: refclk
+
+  microchip,sfr:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to Special Function Register (SFR) node.To enable the DSI/CSI
+      selection bit in SFR's ISS Configuration Register.
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description:
+          DSI Input port node, connected to the LCDC RGB output port.
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description:
+          DSI Output port node, connected to a panel or a bridge input port.
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - ports
+
+unevaluatedProperties: false
+
+examples:
+  - |
+     #include <dt-bindings/clock/at91.h>
+     #include <dt-bindings/gpio/gpio.h>
+
+     dsi@...54000 {
+       compatible = "microchip,sam9x75-mipi-dsi";
+       reg = <0xf8054000 0x200>;
+       clocks = <&pmc PMC_TYPE_PERIPHERAL 54>, <&pmc PMC_TYPE_GCK 55>;
+       clock-names = "pclk", "refclk";
+       microchip,sfr = <&sfr>;
+
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       ports {
+         #address-cells = <1>;
+         #size-cells = <0>;
+
+         port@0 {
+           reg = <0>;
+           dsi_in: endpoint {
+             remote-endpoint = <&hlcdc_panel_output>;
+           };
+         };
+
+         port@1 {
+           reg = <1>;
+           dsi_out: endpoint {
+             remote-endpoint = <&mipi_in_panel>;
+           };
+         };
+       };
+     };
+...
-- 
2.25.1