Re: [PATCH v2 1/3] dt-bindings: display: msm: qcm2290-mdss: Fix iommus property

From: Krzysztof Kozlowski

Date: Fri Jan 16 2026 - 03:46:57 EST


On Fri, Jan 16, 2026 at 11:50:02AM +0530, Sumit Garg wrote:
> From: Sumit Garg <sumit.garg@xxxxxxxxxxxxxxxx>
>
> Fix IOMMU DT propety for display via dropping SMMU stream IDs which
> relates to secure context bank. Assigning Linux kernel (HLOS) VMID
> to secure context bank stream IDs is incorrect.
>
> The min value is added for iommus property to ensure in future when
> secure context bank stream IDs are properly supported then the iommus
> property is extensible.
>
> These DT bindings changes should be backwards compatible.
>
> Signed-off-by: Sumit Garg <sumit.garg@xxxxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml
> index f0cdb5422688..5c888f07bc0b 100644
> --- a/Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml
> @@ -33,6 +33,7 @@ properties:
> - const: core
>
> iommus:
> + minItems: 1

Same comment as other changes like that, which I already gave guideline
- you need to list the items (minItems stay), because you now claim the
order matters and is strictly defined.

Best regards,
Krzysztof