linux-kernel - [PATCH v7 1/3] dt-bindings: drm/bridge: Document Cadence MHDP bridge bindings

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Date:   Wed, 22 Jul 2020 09:40:38 +0200
From:   Swapnil Jakhade <sjakhade@...ence.com>
To:     <airlied@...ux.ie>, <daniel@...ll.ch>,
        <Laurent.pinchart@...asonboard.com>, <robh+dt@...nel.org>,
        <a.hajda@...sung.com>, <narmstrong@...libre.com>,
        <jonas@...boo.se>, <jernej.skrabec@...l.net>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <mparab@...ence.com>, <sjakhade@...ence.com>,
        <yamonkar@...ence.com>, <tomi.valkeinen@...com>, <jsarha@...com>,
        <nsekhar@...com>, <praneeth@...com>
Subject: [PATCH v7 1/3] dt-bindings: drm/bridge: Document Cadence MHDP bridge bindings

From: Yuti Amonkar <yamonkar@...ence.com>

Document the bindings used for the Cadence MHDP DPI/DP bridge in
yaml format.

Signed-off-by: Yuti Amonkar <yamonkar@...ence.com>
Signed-off-by: Swapnil Jakhade <sjakhade@...ence.com>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
 .../bindings/display/bridge/cdns,mhdp.yaml    | 127 ++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml
new file mode 100644
index 000000000000..cdf5760d4ec5
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml
@@ -0,0 +1,127 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/display/bridge/cdns,mhdp.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Cadence MHDP bridge
+
+maintainers:
+  - Swapnil Jakhade <sjakhade@...ence.com>
+  - Yuti Amonkar <yamonkar@...ence.com>
+
+properties:
+  compatible:
+    enum:
+      - cdns,mhdp8546
+      - ti,j721e-mhdp8546
+
+  reg:
+    minItems: 1
+    maxItems: 2
+    items:
+      - description:
+          Register block of mhdptx apb registers up to PHY mapped area (AUX_CONFIG_P).
+          The AUX and PMA registers are not part of this range, they are instead
+          included in the associated PHY.
+      - description:
+          Register block for DSS_EDP0_INTG_CFG_VP registers in case of TI J7 SoCs.
+
+  reg-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      - const: mhdptx
+      - const: j721e-intg
+
+  clocks:
+    maxItems: 1
+    description:
+      DP bridge clock, used by the IP to know how to translate a number of
+      clock cycles into a time (which is used to comply with DP standard timings
+      and delays).
+
+  phys:
+    description:
+      phandle to the DisplayPort PHY.
+
+  ports:
+    type: object
+    description:
+      Ports as described in Documentation/devicetree/bindings/graph.txt.
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      port@0:
+        type: object
+        description:
+          Input port representing the DP bridge input.
+
+      port@1:
+        type: object
+        description:
+          Output port representing the DP bridge output.
+
+    required:
+      - port@0
+      - port@1
+      - '#address-cells'
+      - '#size-cells'
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,j721e-mhdp8546
+    then:
+      properties:
+        reg:
+          minItems: 2
+        reg-names:
+          minItems: 2
+
+required:
+  - compatible
+  - clocks
+  - reg
+  - reg-names
+  - phys
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    mhdp: dp-bridge@...b000000 {
+        compatible = "cdns,mhdp8546";
+        reg = <0xf0 0xfb000000 0x0 0x1000000>;
+        reg-names = "mhdptx";
+        clocks = <&mhdp_clock>;
+        phys = <&dp_phy>;
+
+        ports {
+              #address-cells = <1>;
+              #size-cells = <0>;
+
+              port@0 {
+                     reg = <0>;
+                     dp_bridge_input: endpoint {
+                        remote-endpoint = <&xxx_dpi_output>;
+                     };
+              };
+
+              port@1 {
+                     reg = <1>;
+                     dp_bridge_output: endpoint {
+                        remote-endpoint = <&xxx_dp_connector_input>;
+                     };
+              };
+        };
+    };
+...
-- 
2.26.1