Re: [PATCH v2 2/6] dt-bindings: display/msm: gpu: Document A612 GPU

[Akhil P Oommen]

On 11/10/2025 1:18 PM, Krzysztof Kozlowski wrote:
> On Fri, Nov 07, 2025 at 02:20:07AM +0530, Akhil P Oommen wrote:
>> A612 GPU has a new IP called RGMU (Reduced Graphics Management Unit)
>> which replaces GMU. But it doesn't do clock or voltage scaling. So we
>> need the gpu core clock in the GPU node along with the power domain to
>> do clock and voltage scaling from the kernel. Update the bindings to
>> describe this GPU.
>>
>> Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
>> ---
>>  .../devicetree/bindings/display/msm/gpu.yaml       | 32 ++++++++++++++++++++--
>>  1 file changed, 30 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/display/msm/gpu.yaml b/Documentation/devicetree/bindings/display/msm/gpu.yaml
>> index 826aafdcc20b..a6bbc88e6a24 100644
>> --- a/Documentation/devicetree/bindings/display/msm/gpu.yaml
>> +++ b/Documentation/devicetree/bindings/display/msm/gpu.yaml
>> @@ -45,11 +45,11 @@ properties:
>>            - const: amd,imageon
>>  
>>    clocks:
>> -    minItems: 2
>> +    minItems: 1
>>      maxItems: 7
>>  
>>    clock-names:
>> -    minItems: 2
>> +    minItems: 1
>>      maxItems: 7
>>  
>>    reg:
>> @@ -387,6 +387,34 @@ allOf:
>>        required:
>>          - clocks
>>          - clock-names
>> +
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            const: qcom,adreno-612.0
>> +    then:
>> +      properties:
>> +        clocks:
>> +          items:
>> +            - description: GPU Core clock
>> +
>> +        clock-names:
>> +          items:
>> +            - const: core
>> +
>> +        reg:
>> +          items:
>> +            - description: GPU Reg memory
>> +
>> +        reg-names:
>> +          items:
>> +            - const: kgsl_3d0_reg_memory
> 
> What happened with the second entry? Please describe the hardware
> COMPLETELY (see writing bindings doc).

We can describe cx_mem and cx_dbgc too here. Then it matches the common
schema described at the top of this file. In that case, do we need to
re-describe it here or we can just remove both reg and reg-names
properties here?

-Akhil.

> 
> Best regards,
> Krzysztof
>