Re: [PATCH v4 5/7] media: qcom: camss: Add support for named power-domains

[Bryan O'Donoghue]

On 18/11/2023 00:38, Konrad Dybcio wrote:
> On 3.11.2023 13:29, Bryan O'Donoghue wrote:
> > Right now we use fixed indexes to assign power-domains, with a
> > requirement for the TOP GDSC to come last in the list.
> >
> > Adding support for named power-domains means the declaration in the dtsi
> > can come in any order.
> >
> > After this change we continue to support the old indexing - if a SoC
> > resource declaration or the in-use dtb doesn't declare power-domain names
> > we fall back to the default legacy indexing.
> >
> >  From this point on though new SoC additions should contain named
> > power-domains, eventually we will drop support for legacy indexing.
> >
> > Tested-by: Matti Lehtimäki <matti.lehtimaki@xxxxxxxxx>
> > Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
> > ---
> rg -l "&cc.* \{" arch/arm64/boot/dts/qcom # (the bus is named cci or cciN)
>
> arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
> arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dts
> arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dts
> arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dts
>
> the FP4 only has bus enablements (i.e. no attached sensors)
> the number of working DB845c/RB3s is probably single-digit today
>
> 410c and rb5 are probably legit users.. part of me would like to
> get rid of this messy old binding ASAP.. but then are there really
> non-Bryans with these boards and the camera mezzs?
>
> Konrad

The plan here is to follow the procedures as I understand them.

- Deprecate
- Wait a reasonable amount of time ~ 1 year or so
- Drop

We could go faster but, there's no need. Drawing a line on new SoCs and 
deprecating the old way will do fine.

---
bod