[PATCH 02/22] dt-bindings: media: qcom,sm8550-iris: Allow IOVA reservation memory-region

[Vikash Garodia]

From: Daniel J Blueman <daniel@xxxxxxxxx>

Non-pixel stream IDs should not allocate IOVA space from the 0 to 600MB
restricted region, as this region is reserved exclusively for secure
non-pixel.

In addition to the firmware-loaded codec carveout, Iris platforms need
to declare an IOMMU IOVA reservation (a reserved-memory node with
iommu-addresses) to keep DMA away from restricted IOVA range.

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>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxxxxx>
Signed-off-by: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
---
 Documentation/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 0400ca1bff05dcef6b742c3fbf77e38adca9f280..7dff7293fd5c834b0ea617ece87ffbf0d40e821a 100644
--- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
+++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
@@ -84,7 +84,10 @@ 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
 

-- 
2.34.1