linux-kernel - [PATCH v2] dt-bindings: display: mediatek: dp: Reference common DAI properties

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Message-ID: <20241105090207.3892242-1-fshao@chromium.org>
Date: Tue,  5 Nov 2024 17:00:28 +0800
From: Fei Shao <fshao@...omium.org>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc: Fei Shao <fshao@...omium.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Rob Herring <robh@...nel.org>,
	devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v2] dt-bindings: display: mediatek: dp: Reference common DAI properties

The MediaTek DP hardware supports audio and exposes a DAI, so the
'#sound-dai-cells' property is needed for describing the DAI links.

Reference the dai-common.yaml schema to allow '#sound-dai-cells' to be
used, and filter out non-DP compatibles as MediaTek eDP in the same
binding doesn't support audio.

This fixes dtbs_check error:
  '#sound-dai-cells' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Fei Shao <fshao@...omium.org>
---

Changes in v2:
- reference to dai-common.yaml since the hardware exposes DAI
  and update to `unevaluatedProperties: false`
- update commit message

 .../display/mediatek/mediatek,dp.yaml         | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
index 2aef1eb32e11..75ce92f4a5fd 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
@@ -42,6 +42,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  '#sound-dai-cells':
+    const: 0
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
     properties:
@@ -85,7 +88,21 @@ required:
   - ports
   - max-linkrate-mhz
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/sound/dai-common.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - mediatek,mt8188-dp-tx
+                - mediatek,mt8195-dp-tx
+    then:
+      properties:
+        '#sound-dai-cells': false
+
+unevaluatedProperties: false
 
 examples:
   - |
-- 
2.47.0.277.g8800431eea-goog