[PATCH 03/22] dt-bindings: media: qcom,sc7180-venus: Allow IOVA reservation memory-region

[Vikash Garodia]

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, 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: 545d984cc90c ("media: dt-bindings: media: venus: Add sc7180 DT schema")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/media/qcom,sc7180-venus.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/qcom,sc7180-venus.yaml b/Documentation/devicetree/bindings/media/qcom,sc7180-venus.yaml
index b21bed314848480b82153e49602f0b19e08e7335..52de5a5465b0f0b245b55eac6cd1acf16a00f7cf 100644
--- a/Documentation/devicetree/bindings/media/qcom,sc7180-venus.yaml
+++ b/Documentation/devicetree/bindings/media/qcom,sc7180-venus.yaml
@@ -51,7 +51,10 @@ properties:
     maxItems: 1
 
   memory-region:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: Firmware-loaded codec carveout
+      - description: IOMMU IOVA reservation region
 
   interconnects:
     maxItems: 2

-- 
2.34.1