media: dt-bindings: allwinner: h6-vpu-g2: Add IOMMU reference property

The Hantro G2 video decoder block sits behind an IOMMU. The device tree
binding needs a property to reference it. Without a reference for the
implementation to properly configure the IOMMU, it will fault and cause
the video decoder to fail.

Add an "iommus" property for referring to the IOMMU port. The master ID
in the example is taken from the IOMMU fault error message on Linux,
and the number seems to match the order in the user manual's IOMMU
diagram.

Fixes: fd6be12716c4 ("media: dt-bindings: allwinner: document H6 Hantro G2 binding")
Signed-off-by: Chen-Yu Tsai <[email protected]>
Acked-by: Jernej Skrabec <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jernej Skrabec <[email protected]>

diff --git a/Documentation/devicetree/bindings/media/allwinner,sun50i-h6-vpu-g2.yaml b/Documentation/devicetree/bindings/media/allwinner,sun50i-h6-vpu-g2.yaml
index 24d7bf21499e4f1c94ff2907be1059ede0dc6857..9d44236f2debdca6df9386ce5bf660d8b8a48c2f 100644 (file)
--- a/Documentation/devicetree/bindings/media/allwinner,sun50i-h6-vpu-g2.yaml
+++ b/Documentation/devicetree/bindings/media/allwinner,sun50i-h6-vpu-g2.yaml
@@ -36,6 +36,9 @@ properties:
   resets:
     maxItems: 1
 
+  iommus:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -43,6 +46,7 @@ required:
   - clocks
   - clock-names
   - resets
+  - iommus
 
 additionalProperties: false
 
@@ -59,6 +63,7 @@ examples:
         clocks = <&ccu CLK_BUS_VP9>, <&ccu CLK_VP9>;
         clock-names = "bus", "mod";
         resets = <&ccu RST_BUS_VP9>;
+        iommus = <&iommu 5>;
     };
 
 ...