Re: [PATCH v2 11/14] dt-bindings: media: qcom,qcm2290-camss: Add OPE ISP subnode

Konrad Dybcio
2026-04-28T09:50:19Z

On 4/28/26 8:35 AM, Krzysztof Kozlowski wrote:
> On Mon, Apr 27, 2026 at 02:43:38PM +0200, Loic Poulain wrote:
>> Extend the qcm2290 CAMSS binding to describe CAMSS as a simple bus by
>> allowing child ISP nodes. Add the required address and size cells, as
>> well as ranges, and validate ISP subnodes against the existing
>> qcom,qcm2290-camss-ope schema.
>>
>> On qcm2290 the OPE (Offline Processing Engine) is a memory-to-memory
>> ISP (Image Signal Processor).
>>
>> Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
>> ---
>> .../devicetree/bindings/media/qcom,qcm2290-camss.yaml | 13 +++++++++++++
>> 1 file changed, 13 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/media/qcom,qcm2290-camss.yaml b/Documentation/devicetree/bindings/media/qcom,qcm2290-camss.yaml
>> index 391d0f6f67ef5fdfea31dd3683477561516b1556..d8b356028e24c3c5b2e9b7f20e220db7d491ad68 100644
>> --- a/Documentation/devicetree/bindings/media/qcom,qcm2290-camss.yaml
>> +++ b/Documentation/devicetree/bindings/media/qcom,qcm2290-camss.yaml
>> @@ -52,6 +52,14 @@ properties:
>> - const: vfe1
>> - const: vfe1_cphy_rx
>>
>> + '#address-cells':
>
> Please use consistent quotes, either ' or "
>
>> + const: 2
>
> This means the child will use 64-bit addressing, but does it need that?
> Or do you need that to have 36-bit DMA addressing? If there are true no
> needs for above, usually recommendation is to use narrowe address space
> for children, so only 32-bit.

I can't find data for this platform, but on e.g. Hamoa, most camera
components can address 36b

Konrad