Subject: [PATCH 1/7] dt-bindings: media: sun4i-a10-video-engine: Fix IOMMU count for H6

From: Chen-Yu Tsai <[email-masked]>
Date: Tue, 5 May 2026 21:48:05 +0800

On the H6 SoC, the Video Engine has two memory ports, thus two IOMMU
connections. The secondary one that is missing is likely used for
reading reference frames. The newer H616 is the same. On the other
hand, the D1 only has one memory port.

Add the missing IOMMU connection for the Video Engine.

Fixes: 62a8ccf3a248 ("arm64: dts: allwinner: h6: Fix Cedrus IOMMU usage")
Signed-off-by: Chen-Yu Tsai <[email-masked]>
---
 .../allwinner,sun4i-a10-video-engine.yaml     | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-video-engine.yaml b/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-video-engine.yaml
index 01f2afa023f0..932043d7f0cc 100644
--- a/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-video-engine.yaml
+++ b/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-video-engine.yaml
@@ -55,7 +55,10 @@ properties:
     description: Phandle to the device SRAM
 
   iommus:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: VE port on IOMMU
+      - description: VE_R port on IOMMU
 
   memory-region:
     maxItems: 1
@@ -82,6 +85,22 @@ required:
   - resets
   - allwinner,sram
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - allwinner,sun50i-h6-video-engine
+    then:
+      properties:
+        iommus:
+          minItems: 2
+    else:
+      properties:
+        iommus:
+          maxItems: 1
+
 additionalProperties: false
 
 examples:
-- 
2.47.3