linux-kernel - Re: [PATCH v18 3/8] dt-bindings: display: bridge: Add Cadence MHDP8501

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Message-ID:
 <PAXPR04MB9448DD60509C9A9882EE21EEF4522@PAXPR04MB9448.eurprd04.prod.outlook.com>
Date: Tue, 5 Nov 2024 14:05:45 +0000
From: Sandor Yu <sandor.yu@....com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: "andrzej.hajda@...el.com" <andrzej.hajda@...el.com>,
	"neil.armstrong@...aro.org" <neil.armstrong@...aro.org>, Laurent Pinchart
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Subject: Re: [PATCH v18 3/8] dt-bindings: display: bridge: Add Cadence
 MHDP8501

> On Tue, Oct 29, 2024 at 02:02:11PM +0800, Sandor Yu wrote:
> > Add bindings for Cadence MHDP8501 DisplayPort/HDMI bridge.
> >
> > Signed-off-by: Sandor Yu <Sandor.yu@....com>
> > ---
> > v17->v18:
> > - remove lane-mapping and replace it with data-lanes
> > - remove r-b tag as property changed.
> >
> > v16->v17:
> > - Add lane-mapping property
> >
> > v9->v16:
> >  *No change
> >
> >  .../display/bridge/cdns,mhdp8501.yaml         | 112
> ++++++++++++++++++
> >  1 file changed, 112 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yaml
> > b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yaml
> > new file mode 100644
> > index 0000000000000..e4b900ecf1ac9
> > --- /dev/null
> > +++
> b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.y
> > +++ aml
> > @@ -0,0 +1,112 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fschemas%2Fdisplay%2Fbridge%2Fcdns%2Cmhdp8501.yaml%
> 23&dat
> >
> +a=05%7C02%7CSandor.yu%40nxp.com%7Cda19a2cbbf2148c7f6f208dcf9e6
> 050f%7C
> >
> +686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63866001353856588
> 4%7CUnkno
> >
> +wn%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1
> haWwi
> >
> +LCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=WZvYuredQsK8abMP4bFoWGF
> a2DXUgzD0k5D
> > +MNnMdc3M%3D&reserved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C02%7CSandor.
> yu%40n
> >
> +xp.com%7Cda19a2cbbf2148c7f6f208dcf9e6050f%7C686ea1d3bc2b4c6fa92
> cd99c5
> >
> +c301635%7C0%7C0%7C638660013538587632%7CUnknown%7CTWFpbGZs
> b3d8eyJWIjoi
> >
> +MC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0
> %7C%7C%
> >
> +7C&sdata=OVinvIp2pzVTtMo%2FA6jsMaypCUch31CA0PhINPOx%2FrU%3D&
> reserved=
> > +0
> > +
> > +title: Cadence MHDP8501 DP/HDMI bridge
> > +
> > +maintainers:
> > +  - Sandor Yu <Sandor.yu@....com>
> > +
> > +description:
> > +  Cadence MHDP8501 DisplayPort/HDMI interface.
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - fsl,imx8mq-mhdp8501
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +    description: MHDP8501 DP/HDMI APB clock.
> > +
> > +  phys:
> > +    maxItems: 1
> > +    description:
> > +      phandle to the DP/HDMI PHY
> > +
> > +  interrupts:
> > +    items:
> > +      - description: Hotplug cable plugin.
> > +      - description: Hotplug cable plugout.
> > +
> > +  interrupt-names:
> > +    items:
> > +      - const: plug_in
> > +      - const: plug_out
> > +
> > +  data-lanes:
> > +    $ref: /schemas/media/video-interfaces.yaml#/properties/data-lanes
> > +    minItems: 4
> > +    maxItems: 4
> > +    description: Lane reordering for HDMI or DisplayPort interface.
> 
> So, HDMI or DP port? I don't think the format is actually the same, so it is
> either-or.
> 
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description:
> > +          Input port from display controller output.
> > +      port@1:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description:
> > +          Output port to DisplayPort or HDMI connector.
> > +
> > +    required:
> > +      - port@0
> > +      - port@1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - interrupts
> > +  - interrupt-names
> > +  - phys
> > +  - data-lanes
> > +  - ports
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/imx8mq-clock.h>
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > +    mhdp: display-bridge@...00000 {
> > +        compatible = "fsl,imx8mq-mhdp8501";
> > +        reg = <0x32c00000 0x100000>;
> > +        interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>,
> > +                     <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
> > +        interrupt-names = "plug_in", "plug_out";
> > +        clocks = <&clk IMX8MQ_CLK_DISP_APB_ROOT>;
> > +        phys = <&mdhp_phy>;
> > +        data-lanes = <1 2 3 4>;
> 
> 0 1 2 3

OK.

B.R
Sandor

> 
> > +
> > +        ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            port@0 {
> > +                reg = <0>;
> > +
> > +                mhdp_in: endpoint {
> > +                    remote-endpoint = <&dcss_out>;
> > +                };
> > +            };
> > +
> > +            port@1 {
> > +                reg = <1>;
> > +
> > +                mhdp_out: endpoint {
> > +                    remote-endpoint = <&dp_connector>;
> > +                };
> > +            };
> > +        };
> > +    };
> > --
> > 2.34.1
> >
> 
> --
> With best wishes
> Dmitry