Hello,
On Fri, Oct 14, 2022 at 03:28:31AM +0000, allen.chen@xxxxxxxxxx wrote:
> On Friday, October 14, 2022 3:20 AM, Rob Herring wrote:
> > On Thu, Oct 13, 2022 at 02:05:45PM +0300, Laurent Pinchart wrote:
> > > On Thu, Oct 13, 2022 at 06:51:13PM +0800, allen wrote:
> > > > From: allen chen <allen.chen@xxxxxxxxxx>
> > > >
> > > > Add properties to restrict dp output data-lanes and clock.
> > > >
> > > > Signed-off-by: Pin-Yen Lin <treapking@xxxxxxxxxxxx>
> > > > Signed-off-by: Allen Chen <allen.chen@xxxxxxxxxx>
> > > > ---
> > > > .../bindings/display/bridge/ite,it6505.yaml | 43 +++++++++++++++++++
> > > > 1 file changed, 43 insertions(+)
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> > > > index 833d11b2303a7..f2c3d1d10359e 100644
> > > > --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> > > > +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> > > > @@ -52,10 +52,51 @@ properties:
> > > > maxItems: 1
> > > > description: extcon specifier for the Power Delivery
> > > >
> > > > + data-lanes:
> > > > + oneOf:
> > > > + - minItems: 1
> > > > + maxItems: 1
> > > > + uniqueItems: true
> > > > + items:
> > > > + enum:
> > > > + - 0
> > > > + - 1
> > > > + description: For one lane operation.
> > > > +
> > > > + - minItems: 2
> > > > + maxItems: 2
> > > > + uniqueItems: true
> > > > + items:
> > > > + enum:
> > > > + - 0
> > > > + - 1
> > > > + description: For two lanes operation.
> > > > +
> > > > + - minItems: 4
> > > > + maxItems: 4
> > > > + uniqueItems: true
> > > > + items:
> > > > + enum:
> > > > + - 0
> > > > + - 1
> > > > + - 2
> > > > + - 3
> > > > + description: For four lanes operation.
> > >
> > > The data lanes should be in the output endpoint. If there's no output
> > > port, one should be added.
>
> ==> In this dt-binding, our output point is "extcon" so doesn't have output endpoint.
> I don't know how to add the endpoint.
> If need to add the endpoint to this dt-binding, what is your recommend about adding the endpoint?
You will also need to add a port to the USB-C connector. Then endpoints
can be added to connect the two.
> By the way, Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> said
> we could put "data-lanes" here.
If I read him correctly, Krzysztof said we have a standard property for
the data lanes (and that's true, we do), but I don't think he implied it
could be put outside of the endpoint (Krzysztof, please correct me if
I'm wrong).
> > > > +
> > > > port:
> > > > $ref: /schemas/graph.yaml#/properties/port
> >
> > To fix the error, this must be:
> >
> > $ref: /schemas/graph.yaml#/$defs/port-base
> > unevaluatedProperties: false
> >
> > > > description: A port node pointing to DPI host port node
> > > >
> > > > + properties:
> > > > + endpoint:
> > > > + $ref: /schemas/graph.yaml#/$defs/endpoint-base
> > > > +
> > > > + properties:
> > > > + link-frequencies:
> > > > + minItems: 1
> > > > + maxItems: 1
> > > > + description: Allowed max link frequencies in Hz.
> > > > +
> > > > required:
> > > > - compatible
> > > > - ovdd-supply
> > > > @@ -84,10 +125,12 @@ examples:
> > > > pwr18-supply = <&it6505_pp18_reg>;
> > > > reset-gpios = <&pio 179 1>;
> > > > extcon = <&usbc_extcon>;
> > > > + data-lanes = <0 1>;
> > > >
> > > > port {
> > > > it6505_in: endpoint {
> > > > remote-endpoint = <&dpi_out>;
> > > > + link-frequencies = /bits/ 64 <150000000>;
> > > > };
> > > > };
> > > > };
--
Regards,
Laurent Pinchart
