[PATCH 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.

Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxx>
---
 Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml | 6 +++++-
 1 file changed, 5 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..6359e4953d42 100644
--- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
+++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
@@ -80,7 +80,11 @@ properties:
   dma-coherent: true

   memory-region:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
+    items:
+      - description: Firmware-loaded codec carveout
+      - description: IOMMU IOVA reservation region

   operating-points-v2: true

--
2.53.0