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Date:   Tue, 22 Dec 2020 10:59:57 +0800
From:   Liu Ying <victor.liu@....com>
To:     Rob Herring <robh@...nel.org>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, airlied@...ux.ie, daniel@...ll.ch,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, mchehab@...nel.org,
        a.hajda@...sung.com, narmstrong@...libre.com,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...l.net, kishon@...com, vkoul@...nel.org
Subject: Re: [PATCH 04/14] dt-bindings: display: bridge: Add i.MX8qm/qxp
 pixel combiner binding

On Mon, 2020-12-21 at 15:07 -0700, Rob Herring wrote:
> On Thu, Dec 17, 2020 at 05:59:23PM +0800, Liu Ying wrote:
> > This patch adds bindings for i.MX8qm/qxp pixel combiner.
> > 
> > Signed-off-by: Liu Ying <victor.liu@....com>
> > ---
> >  .../display/bridge/fsl,imx8qxp-pixel-combiner.yaml | 160 +++++++++++++++++++++
> >  1 file changed, 160 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml
> > new file mode 100644
> > index 00000000..bacacd8
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml
> > @@ -0,0 +1,160 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fdisplay%2Fbridge%2Ffsl%2Cimx8qxp-pixel-combiner.yaml%23&amp;data=04%7C01%7Cvictor.liu%40nxp.com%7Ca98fcf2b328a42c15d1308d8a5fcc905%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637441852425445153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=%2FvqD2n1aI5sBaXbCHhsWCjp91Zk1wB8q69xNEssRVvE%3D&amp;reserved=0
> > +$schema: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cvictor.liu%40nxp.com%7Ca98fcf2b328a42c15d1308d8a5fcc905%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637441852425455147%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=h15%2FU7V8yTNeUPmnR%2FSGNolEHOYQwQ9gHyKwdoyg2q4%3D&amp;reserved=0
> > +
> > +title: Freescale i.MX8qm/qxp Pixel Combiner
> > +
> > +maintainers:
> > +  - Liu Ying <victor.liu@....com>
> > +
> > +description: |
> > +  The Freescale i.MX8qm/qxp Pixel Combiner takes two output streams from a
> > +  single display controller and manipulates the two streams to support a number
> > +  of modes(bypass, pixel combine, YUV444 to YUV422, split_RGB) configured as
> > +  either one screen, two screens, or virtual screens.  The pixel combiner is
> > +  also responsible for generating some of the control signals for the pixel link
> > +  output channel.
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - fsl,imx8qm-pixel-combiner
> > +      - fsl,imx8qxp-pixel-combiner
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  clock-names:
> > +    const: apb
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +patternProperties:
> > +  "^channel@[0-1]$":
> > +    type: object
> > +    description: Represents a display stream of pixel combiner.
> > +
> > +    properties:
> > +      "#address-cells":
> > +        const: 1
> > +
> > +      "#size-cells":
> > +        const: 0
> > +
> > +      reg:
> > +        description: The display stream index.
> > +        oneOf:
> > +          - const: 0
> > +          - const: 1
> 
> enum: [ 0, 1 ]

I forgot to modify this oneOf + const to enum.
Will do.  Thanks.

> 
> > +
> > +      port@0:
> > +        type: object
> > +        description: Input endpoint of the display stream.
> > +
> > +        properties:
> > +          reg:
> > +            const: 0
> > +
> > +        required:
> > +          - reg
> 
> You can drop 'reg' parts. That's going to get covered by the graph 
> schema.

I'm assuming the 'const' numbers for 'reg' parts are still needed, so
I'll keep the 'const' parts.

I'll drop 'required' parts for 'reg'.

Liu Ying

> 
> > +
> > +      port@1:
> > +        type: object
> > +        description: Output endpoint of the display stream.
> > +
> > +        properties:
> > +          reg:
> > +            const: 1
> > +
> > +        required:
> > +          - reg
> > +
> > +    required:
> > +      - "#address-cells"
> > +      - "#size-cells"
> > +      - reg
> > +      - port@0
> > +      - port@1
> > +
> > +    additionalProperties: false
> > +
> > +required:
> > +  - compatible
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - power-domains
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/imx8-lpcg.h>
> > +    #include <dt-bindings/firmware/imx/rsrc.h>
> > +    pixel-combiner@...20000 {
> > +        compatible = "fsl,imx8qxp-pixel-combiner";
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +        reg = <0x56020000 0x10000>;
> > +        clocks = <&dc0_pixel_combiner_lpcg IMX_LPCG_CLK_4>;
> > +        clock-names = "apb";
> > +        power-domains = <&pd IMX_SC_R_DC_0>;
> > +
> > +        channel@0 {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +            reg = <0>;
> > +
> > +            port@0 {
> > +                reg = <0>;
> > +
> > +                dc0_pixel_combiner_ch0_dc0_dpu_disp0: endpoint {
> > +                    remote-endpoint = <&dc0_dpu_disp0_dc0_pixel_combiner_ch0>;
> > +                };
> > +            };
> > +
> > +            port@1 {
> > +                reg = <1>;
> > +
> > +                dc0_pixel_combiner_ch0_dc0_pixel_link0: endpoint {
> > +                    remote-endpoint = <&dc0_pixel_link0_dc0_pixel_combiner_ch0>;
> > +                };
> > +            };
> > +        };
> > +
> > +        channel@1 {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +            reg = <1>;
> > +
> > +            port@0 {
> > +                reg = <0>;
> > +
> > +                dc0_pixel_combiner_ch1_dc0_dpu_disp1: endpoint {
> > +                    remote-endpoint = <&dc0_dpu_disp1_dc0_pixel_combiner_ch1>;
> > +                };
> > +            };
> > +
> > +            port@1 {
> > +                reg = <1>;
> > +
> > +                dc0_pixel_combiner_ch1_dc0_pixel_link1: endpoint {
> > +                    remote-endpoint = <&dc0_pixel_link1_dc0_pixel_combiner_ch1>;
> > +                };
> > +            };
> > +        };
> > +    };
> > -- 
> > 2.7.4
> > 

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