On Wed Jul 22 19:11:19 2026 +0530, Vikash Garodia wrote:
> Document the venus video accelerator used on shikra platforms by adding
> the qcom,shikra-venus compatible.
>
> Although QCM2290 and shikra share the same video hardware and overall
> integration, their SMMU programming differs. QCM2290 exposes separate
> stream IDs for the video hardware and the Xtensa path, requiring two
> explicit IOMMU entries, whereas shikra uses a masked SMR to collapse
> equivalent stream IDs into a single mapping. Due to QCM2290's SID layout
> and Xtensa isolation requirements, such SMR masking is not applicable on
> QCM2290 platforms.
> Since shikra uses the same video hardware as QCM2290 and shares the same
> programming model and capabilities, it is added as a fallback compatible
> to qcom,qcm2290-venus, with conditional handling to allow either one or
> two IOMMU entries.
>
> Reviewed-by: Vishnu Reddy <[email protected]>
> Signed-off-by: Vikash Garodia <[email protected]>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> Signed-off-by: Bryan O'Donoghue <[email protected]>
Patch committed.
Thanks,
Bryan O'Donoghue
.../bindings/media/qcom,qcm2290-venus.yaml | 26 ++++++++++++++++------
1 file changed, 19 insertions(+), 7 deletions(-)
---
diff --git a/Documentation/devicetree/bindings/media/qcom,qcm2290-venus.yaml
b/Documentation/devicetree/bindings/media/qcom,qcm2290-venus.yaml
index 5977e7d0a71b..b27899ebf164 100644
--- a/Documentation/devicetree/bindings/media/qcom,qcm2290-venus.yaml
+++ b/Documentation/devicetree/bindings/media/qcom,qcm2290-venus.yaml
@@ -13,14 +13,13 @@ description:
The Venus AR50_LITE IP is a video encode and decode accelerator present
on Qualcomm platforms.
-allOf:
- - $ref: qcom,venus-common.yaml#
-
properties:
compatible:
oneOf:
- items:
- - const: qcom,sm6115-venus
+ - enum:
+ - qcom,shikra-venus
+ - qcom,sm6115-venus
- const: qcom,qcm2290-venus
- const: qcom,qcm2290-venus
@@ -45,9 +44,6 @@ properties:
- const: vcodec0_core
- const: vcodec0_bus
- iommus:
- maxItems: 2
-
interconnects:
maxItems: 2
@@ -65,6 +61,22 @@ required:
- power-domain-names
- iommus
+allOf:
+ - $ref: qcom,venus-common.yaml#
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: qcom,shikra-venus
+ then:
+ properties:
+ iommus:
+ maxItems: 1
+ else:
+ properties:
+ iommus:
+ maxItems: 2
+
unevaluatedProperties: false
examples:
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