Re: [PATCH 11/11] dt-bindings: display/msm: move common DPU properties to dpu-common.yaml

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On Fri, Jul 08, 2022 at 12:14:45PM +0300, Dmitry Baryshkov wrote:
> On 01/07/2022 02:11, Rob Herring wrote:
> > On Sun, Jun 26, 2022 at 02:25:13AM +0300, Dmitry Baryshkov wrote:
> > > Move properties common to all DPU DT nodes to the dpu-common.yaml
> > > 
> > > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> > > ---
> > >   .../bindings/display/msm/dpu-common.yaml      | 47 +++++++++++++++++++
> > >   .../bindings/display/msm/dpu-msm8998.yaml     | 28 ++---------
> > >   .../bindings/display/msm/dpu-qcm2290.yaml     | 29 ++----------
> > >   .../bindings/display/msm/dpu-sc7180.yaml      | 32 ++-----------
> > >   .../bindings/display/msm/dpu-sc7280.yaml      | 32 ++-----------
> > >   .../bindings/display/msm/dpu-sdm845.yaml      | 32 ++-----------
> > >   6 files changed, 67 insertions(+), 133 deletions(-)
> > >   create mode 100644 Documentation/devicetree/bindings/display/msm/dpu-common.yaml
> > > 
> > > diff --git a/Documentation/devicetree/bindings/display/msm/dpu-common.yaml b/Documentation/devicetree/bindings/display/msm/dpu-common.yaml
> > > new file mode 100644
> > > index 000000000000..f3465ee3a4ab
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/msm/dpu-common.yaml
> > > @@ -0,0 +1,47 @@
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/display/msm/dpu-common.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Qualcomm Display DPU dt properties (common properties)
> > > +
> > > +maintainers:
> > > +  - Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> > > +  - Krishna Manikandan <quic_mkrishn@xxxxxxxxxxx>
> > > +  - Rob Clark <robdclark@xxxxxxxxx>
> > > +
> > > +description: |
> > > +  Device tree bindings for the DPU display controller, common properties.
> > 
> > Common properties for QCom DPU display controller
> > 
> > > +
> > > +properties:
> > > +  interrupts:
> > > +    maxItems: 1
> > > +
> > > +  power-domains:
> > > +    maxItems: 1
> > > +
> > > +  operating-points-v2: true
> > > +
> > > +  ports:
> > > +    $ref: /schemas/graph.yaml#/properties/ports
> > 
> > Now this schema is applied twice.
> > 
> > > +    description: |
> > > +      Contains the list of output ports from DPU device. These ports
> > > +      connect to interfaces that are external to the DPU hardware,
> > > +      such as DSI, DP etc. Each output port contains an endpoint that
> > > +      describes how it is connected to an external interface.
> > 
> > This description is marginally useful. Each port will say it is an
> > output to X. So you could just remove.
> 
> I think I will go the other way around. It is not really useful to describe
> individual ports, so I will leave just this piece, slightly rephrased and
> drop individual /ports, /ports/port@N from dpu-foo.yaml.

How is describing individual port not useful? You must define what each 
port is. Input or output. Type of data. Are they all the same?

Rob



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