Re: [PATCH 10/15] dt-bindings: display/msm: Document A850 GPU and GMU

[Krzysztof Kozlowski]

On 23/09/2026 12:25, Akhil P Oommen wrote:
> Adreno A850 GPU found in Hawi SoC belongs to the A8x family and is
> the successor to A840. Like A840, its clocks are described in the GMU
> node and it has the following power related updates:
>   1. GMU is now powered via a dedicated GDSC connected to MxG rail
>   2. An additional power rail called Bx

I don't see the updated related to (2) above

> 
> Describe this GPU/GMU along with the new compatible strings.
> 
> Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
> ---
>  .../devicetree/bindings/display/msm/gmu.yaml       | 44 ++++++++++++++++++++++
>  .../devicetree/bindings/display/msm/gpu.yaml       |  2 +
>  2 files changed, 46 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/gmu.yaml b/Documentation/devicetree/bindings/display/msm/gmu.yaml
> index 9e459f12ce3f..875fd1242528 100644
> --- a/Documentation/devicetree/bindings/display/msm/gmu.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/gmu.yaml
> @@ -55,14 +55,18 @@ properties:
>        - const: gmu
>  
>    power-domains:
> +    minItems: 2
>      items:
>        - description: CX power domain
>        - description: GX power domain
> +      - description: GMU MX power domain
>  
>    power-domain-names:
> +    minItems: 2
>      items:
>        - const: cx
>        - const: gx
> +      - const: gmu_mx

Your commit msg said mxg. Or mx, because this is GMU, so saying that
it's power domain is GMU is redundant.

>  
>    iommus:
>      maxItems: 1
> @@ -359,6 +363,46 @@ allOf:
>              - const: memnoc
>              - const: hub
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: qcom,adreno-gmu-850.1
> +    then:
> +      properties:
> +        reg:
> +          items:
> +            - description: Core GMU registers
> +        reg-names:
> +          items:
> +            - const: gmu
> +        clocks:
> +          items:
> +            - description: GMU clock
> +            - description: GPU CX clock
> +            - description: GPU MEMNOC clock
> +            - description: GPU AHB clock
> +            - description: GPU MXG AHB clock
> +            - description: GMU HUB clock
> +        clock-names:
> +          items:
> +            - const: gmu
> +            - const: cxo
> +            - const: memnoc
> +            - const: ahb

Keep existing order. ahb is first.

> +            - const: mxg_ahb
> +            - const: hub
> +        power-domains:

Just minItems

> +          items:
> +            - description: CX power domain
> +            - description: GX power domain
> +            - description: GMU MX power domain
> +        power-domain-names:

minItems

But OTOH you need to restrict power domains for every other variant
> +          items:
> +            - const: cx
> +            - const: gx
> +            - const: gmu_mx
> +
>    - if:
Best regards,
Krzysztof