[PATCH v2 1/2] dt-bindings: media: qcom,sm8550-iris: Allow IOVA reservation memory-region

[Daniel J Blueman]

In addition to the firmware-loaded codec carveout, some Iris platforms
need to declare an IOMMU IOVA reservation (a reserved-memory node with
iommu-addresses) to keep DMA away from IOVA ranges that earlier
firmware stages have already mapped through the SMMU.

Permit a second memory-region phandle for this purpose, and describe
the meaning of each entry so the ordering is unambiguous.

Fixes: 9065340ac04d ("arm64: dts: qcom: x1e80100: Add IRIS video codec")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxx>
---
v2:
- drop redundant maxItems, keeping the items descriptions (Rob)
- add Fixes tag and Cc stable for the backport dependency
v1: https://lore.kernel.org/lkml/20260601041336.9497-1-daniel@xxxxxxxxx/

 .../devicetree/bindings/media/qcom,sm8550-iris.yaml          | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
index 9c4b760508b5..5abcaee4101c 100644
--- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
+++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
@@ -80,7 +80,10 @@ properties:
   dma-coherent: true
 
   memory-region:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: Firmware-loaded codec carveout
+      - description: IOMMU IOVA reservation region
 
   operating-points-v2: true
 
-- 
2.53.0