linux-kernel - [PATCH v3 1/3] dt-bindings: display: samsung,exynos7-decon: add properties for iommus and ports

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Message-Id: <20250627-exynosdrm-decon-v3-1-5b456f88cfea@disroot.org>
Date: Fri, 27 Jun 2025 00:50:28 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Inki Dae <inki.dae@...sung.com>, Seung-Woo Kim <sw0312.kim@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Conor Dooley <conor@...nel.org>, 
 Ajay Kumar <ajaykumar.rs@...sung.com>, Akshu Agrawal <akshua@...il.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH v3 1/3] dt-bindings: display: samsung,exynos7-decon: add
 properties for iommus and ports

Similar to FIMD and Exynos5433's DECON, the Exynos7 DECON hardware:
- May optionally require an IOMMU to initialize a display region.
- May require a port connection to another block, say an MIC or a DSI
  master.

Document these bindings in the devicetree schema.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 .../bindings/display/samsung/samsung,exynos7-decon.yaml           | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml b/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml
index 53916e4c95d8c0369138941a556c23f5d42fbd39..1e9500c86590d555cfa6f04790e2b64da291b78b 100644
--- a/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml
+++ b/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml
@@ -80,6 +80,14 @@ properties:
       - const: vsync
       - const: lcd_sys
 
+  iommus:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    description:
+      Contains a port which is connected to mic or dsim node.
+
   power-domains:
     maxItems: 1
 

-- 
2.49.0