linux-kernel - [PATCH v3 01/27] media: dt-bindings: media: rockchip-rga: add rockchip,rk3588-rga3

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Message-Id: <20260127-spu-rga3-v3-1-77b273067beb@pengutronix.de>
Date: Tue, 27 Jan 2026 15:39:10 +0100
From: Sven Püschel <s.pueschel@...gutronix.de>
To: Jacob Chen <jacob-chen@...wrt.com>, 
 Ezequiel Garcia <ezequiel@...guardiasur.com.ar>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, kernel@...gutronix.de, 
 Sven Püschel <s.pueschel@...gutronix.de>
Subject: [PATCH v3 01/27] media: dt-bindings: media: rockchip-rga: add
 rockchip,rk3588-rga3

Add a new compatible for the RGA3 (Raster Graphic Acceleration 3)
peripheral found on the RK3588 SoC. Also specify an iommu property,
as the RGA3 contains the generic rockchip iommu. The RGA2 also has
an iommu, but it's specific to the RGA2.

The existing binding refers to the RGA2 peripheral. The RK3588
contains one RGA2 core and two RGA3 cores. Both feature a similar
functionality of scaling, cropping and rotating of up to two input
images into one output image. Key differences of the RGA3 are:

- supports 10bit YUV output formats
- supports 8x8 tiles and FBCD as inputs and outputs
- supports BT2020 color space conversion
- max output resolution of (8192-64)x(8192-64)
- MMU can map up to 32G DDR RAM
- fully planar formats (3 planes) are not supported
- max scale up/down factor of 8 (RGA2 allows up to 16)

Signed-off-by: Sven Püschel <s.pueschel@...gutronix.de>
---
 .../devicetree/bindings/media/rockchip-rga.yaml       | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/rockchip-rga.yaml b/Documentation/devicetree/bindings/media/rockchip-rga.yaml
index ac17cda65191b..7735d8794c719 100644
--- a/Documentation/devicetree/bindings/media/rockchip-rga.yaml
+++ b/Documentation/devicetree/bindings/media/rockchip-rga.yaml
@@ -9,7 +9,9 @@ title: Rockchip 2D raster graphic acceleration controller (RGA)
 description:
   RGA is a standalone 2D raster graphic acceleration unit. It accelerates 2D
   graphics operations, such as point/line drawing, image scaling, rotation,
-  BitBLT, alpha blending and image blur/sharpness.
+  BitBLT, alpha blending and image blur/sharpness. There exist two variants
+  named RGA2 and RGA3 that differ in the supported inputs/output formats,
+  the attached IOMMU and the supported operations on the input.
 
 maintainers:
   - Jacob Chen <jacob-chen@...wrt.com>
@@ -20,6 +22,7 @@ properties:
     oneOf:
       - const: rockchip,rk3288-rga
       - const: rockchip,rk3399-rga
+      - const: rockchip,rk3588-rga3
       - items:
           - enum:
               - rockchip,rk3228-rga
@@ -45,6 +48,9 @@ properties:
   power-domains:
     maxItems: 1
 
+  iommus:
+    maxItems: 1
+
   resets:
     maxItems: 3
 
@@ -54,6 +60,17 @@ properties:
       - const: axi
       - const: ahb
 
+allOf:
+- if:
+    properties:
+      compatible:
+        contains:
+          enum:
+            - rockchip,rk3588-rga3
+  then:
+    required:
+      - iommus
+
 required:
   - compatible
   - reg

-- 
2.52.0