linux-kernel - [PATCH v4 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

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Date:   Thu, 13 Oct 2022 18:51:13 +0800
From:   allen <allen.chen@....com.tw>
To:     unlisted-recipients:; (no To-header on input)
CC:     Allen Chen <allen.chen@....com.tw>,
        Pin-yen Lin <treapking@...omium.org>,
        Jau-Chih Tseng <Jau-Chih.Tseng@....com.tw>,
        Kenneth Hung <Kenneth.Hung@....com.tw>,
        Hermes Wu <Hermes.Wu@....com.tw>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

From: allen chen <allen.chen@....com.tw>

Add properties to restrict dp output data-lanes and clock.

Signed-off-by: Pin-Yen Lin <treapking@...omium.org>
Signed-off-by: Allen Chen <allen.chen@....com.tw>
---
 .../bindings/display/bridge/ite,it6505.yaml   | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
index 833d11b2303a7..f2c3d1d10359e 100644
--- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
@@ -52,10 +52,51 @@ properties:
     maxItems: 1
     description: extcon specifier for the Power Delivery
 
+  data-lanes:
+    oneOf:
+      - minItems: 1
+        maxItems: 1
+        uniqueItems: true
+        items:
+          enum:
+            - 0
+            - 1
+        description: For one lane operation.
+
+      - minItems: 2
+        maxItems: 2
+        uniqueItems: true
+        items:
+          enum:
+            - 0
+            - 1
+        description: For two lanes operation.
+
+      - minItems: 4
+        maxItems: 4
+        uniqueItems: true
+        items:
+          enum:
+            - 0
+            - 1
+            - 2
+            - 3
+        description: For four lanes operation.
+
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: A port node pointing to DPI host port node
 
+    properties:
+      endpoint:
+        $ref: /schemas/graph.yaml#/$defs/endpoint-base
+
+        properties:
+          link-frequencies:
+            minItems: 1
+            maxItems: 1
+            description: Allowed max link frequencies in Hz.
+
 required:
   - compatible
   - ovdd-supply
@@ -84,10 +125,12 @@ examples:
             pwr18-supply = <&it6505_pp18_reg>;
             reset-gpios = <&pio 179 1>;
             extcon = <&usbc_extcon>;
+            data-lanes = <0 1>;
 
             port {
                 it6505_in: endpoint {
                     remote-endpoint = <&dpi_out>;
+                    link-frequencies = /bits/ 64 <150000000>;
                 };
             };
         };
-- 
2.25.1