Re: [PATCH 5/8] dt-bindings: display: bridge: Add ITE IT6263 LVDS to HDMI converter

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Hi Rob,

On 10/02/2024, Rob Herring wrote:
> On Mon, Sep 30, 2024 at 01:29:00PM +0800, Liu Ying wrote:
>> Document ITE IT6263 LVDS to HDMI converter.
>>
>> Product link:
>> https://www.ite.com.tw/en/product/cate1/IT6263
>>
>> Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
>> ---
>>  .../bindings/display/bridge/ite,it6263.yaml   | 310 ++++++++++++++++++
>>  1 file changed, 310 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml
>> new file mode 100644
>> index 000000000000..97fb81e5bc4a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml
>> @@ -0,0 +1,310 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: ITE IT6263 LVDS to HDMI converter
>> +
>> +maintainers:
>> +  - Liu Ying <victor.liu@xxxxxxx>
>> +
>> +description: |
>> +  The IT6263 is a high-performance single-chip De-SSC(De-Spread Spectrum) LVDS
>> +  to HDMI converter.  Combined with LVDS receiver and HDMI 1.4a transmitter,
>> +  the IT6263 supports LVDS input and HDMI 1.4 output by conversion function.
>> +  The built-in LVDS receiver can support single-link and dual-link LVDS inputs,
>> +  and the built-in HDMI transmitter is fully compliant with HDMI 1.4a/3D, HDCP
>> +  1.2 and backward compatible with DVI 1.0 specification.
>> +
>> +  The IT6263 also encodes and transmits up to 8 channels of I2S digital audio,
>> +  with sampling rate up to 192KHz and sample size up to 24 bits. In addition,
>> +  an S/PDIF input port takes in compressed audio of up to 192KHz frame rate.
>> +
>> +  The newly supported High-Bit Rate(HBR) audio by HDMI specifications v1.3 is
>> +  provided by the IT6263 in two interfaces: the four I2S input ports or the
>> +  S/PDIF input port.  With both interfaces the highest possible HBR frame rate
>> +  is supported at up to 768KHz.
>> +
>> +properties:
>> +  compatible:
>> +    const: ite,it6263
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +    description: audio master clock
>> +
>> +  clock-names:
>> +    const: mclk
>> +
>> +  reset-gpios:
>> +    maxItems: 1
>> +
>> +  ivdd-supply:
>> +    description: 1.8V digital logic power
>> +
>> +  ovdd-supply:
>> +    description: 3.3V I/O pin power
>> +
>> +  txavcc18-supply:
>> +    description: 1.8V HDMI analog frontend power
>> +
>> +  txavcc33-supply:
>> +    description: 3.3V HDMI analog frontend power
>> +
>> +  pvcc1-supply:
>> +    description: 1.8V HDMI frontend core PLL power
>> +
>> +  pvcc2-supply:
>> +    description: 1.8V HDMI frontend filter PLL power
>> +
>> +  avcc-supply:
>> +    description: 3.3V LVDS frontend power
>> +
>> +  anvdd-supply:
>> +    description: 1.8V LVDS frontend analog power
>> +
>> +  apvdd-supply:
>> +    description: 1.8V LVDS frontend PLL power
>> +
>> +  "#sound-dai-cells":
>> +    const: 0
>> +
>> +  ite,i2s-audio-fifo-sources:
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    minItems: 1
>> +    maxItems: 4
>> +    items:
>> +      enum: [0, 1, 2, 3]
>> +    description:
>> +      Each array element indicates the pin number of an I2S serial data input
>> +      line which is connected to an audio FIFO, from audio FIFO0 to FIFO3.
>> +
>> +  ite,rl-channel-swap-audio-sources:
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    minItems: 1
>> +    maxItems: 4
>> +    uniqueItems: true
>> +    items:
>> +      enum: [0, 1, 2, 3]
>> +    description:
>> +      Each array element indicates an audio source whose right channel and left
>> +      channel are swapped by this converter. For I2S, the element is the pin
>> +      number of an I2S serial data input line. For S/PDIF, the element is always
>> +      0.
>> +
>> +  ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
> 
> Test your bindings. You need 'additionalProperties: false' here. Though 
> I can't remember if that can 'see' properties under the oneOf. So it may 
> have to be unevaluatedProperties instead.

Ah, I see the same warnings with your bot after upgrading my local dtschema
to dtschema-2024.9. I should have upgraded it earlier, sorry. Before sending
this patch, I tested it with dtschema-2024.2 and there is no warning.

However, there are still the warnings after adding additionalProperties or 
unevaluatedProperties constraint here. With additionalProperties, there are
even some additional errors.  Thoughts?

> 
>> +
>> +    oneOf:
> 
> I think you can get rid of this. If port@1 requires the dual link 
> properties and then properties on port@0, then the only way you can have 
> a single link is removing port@1 from the DT. 

If I get rid of this with the below snippet, I see warnings against
the single-link LVDS input example. It looks like the conditions in
"allOf" are still true even if "port@1" is not in that example.

And it seems difficult to disallow people to add "dual-lvds-odd-pixels"
and/or "dual-lvds-even-pixels" properties to "port@0" when there is no
"port@1". This is not an issue if we use the "oneOf" to separate the
single/dual link cases. Any ideas?

-----------------------------8<-----------------------------
  ports:                                                                         
    $ref: /schemas/graph.yaml#/properties/ports                                  
                                                                                 
    properties:                                                                  
      port@0:                                                                    
        $ref: /schemas/graph.yaml#/$defs/port-base                               
        unevaluatedProperties: false                                             
        description: the first LVDS input link                                   
                                                                                 
        properties:                                                              
          dual-lvds-odd-pixels:                                                  
            type: boolean                                                        
            description: the first sink port for odd pixels                      
                                                                                 
          dual-lvds-even-pixels:                                                 
            type: boolean                                                        
            description: the first sink port for even pixels                     
                                                                                 
      port@1:                                                                    
        $ref: /schemas/graph.yaml#/$defs/port-base                               
        unevaluatedProperties: false                                             
        description: the second LVDS input link                                  
                                                                                 
        properties:                                                              
          dual-lvds-even-pixels:                                                 
            type: boolean                                                        
            description: the second sink port for even pixels                    
                                                                                 
          dual-lvds-odd-pixels:                                                  
            type: boolean                                                        
            description: the second sink port for odd pixels                     
                                                                                 
        oneOf:                                                                   
          - required: [dual-lvds-even-pixels]                                    
          - required: [dual-lvds-odd-pixels]                                     
                                                                                 
      port@2:                                                                    
        $ref: /schemas/graph.yaml#/properties/port                               
        description: video port for the HDMI output                              
                                                                                 
      port@3:                                                                    
        $ref: /schemas/graph.yaml#/properties/port                               
        description: sound input port                                            
                                                                                 
    required:                                                                    
      - port@0                                                                   
      - port@2

    allOf:                                                                       
      - if:                                                                      
          properties:                                                            
            port@1:                                                              
              required:                                                          
                - dual-lvds-odd-pixels                                           
        then:                                                                    
          properties:                                                            
            port@0:                                                              
              required:                                                          
                - dual-lvds-even-pixels                                          
                                                                                 
      - if:                                                                      
          properties:                                                            
            port@1:                                                              
              required:                                                          
                - dual-lvds-even-pixels                                          
        then:                                                                    
          properties:                                                            
            port@0:                                                              
              required:                                                          
                - dual-lvds-odd-pixels                        
-----------------------------8<-----------------------------

Documentation/devicetree/bindings/display/bridge/ite,it6263.example.dtb: hdmi@4c: ports:port@0: 'dual-lvds-even-pixels' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml#
Documentation/devicetree/bindings/display/bridge/ite,it6263.example.dtb: hdmi@4c: ports:port@0: 'dual-lvds-odd-pixels' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml#

> 
>> +      - properties:
>> +          port@0:
>> +            $ref: /schemas/graph.yaml#/properties/port
>> +            description: the first LVDS input link
>> +
>> +          port@1: false
>> +
>> +          port@2:
>> +            $ref: /schemas/graph.yaml#/properties/port
>> +            description: video port for the HDMI output
>> +
>> +          port@3:
>> +            $ref: /schemas/graph.yaml#/properties/port
>> +            description: sound input port
>> +
>> +        required:
>> +          - port@0
>> +          - port@2
>> +
>> +      - properties:
>> +          port@0:
>> +            $ref: /schemas/graph.yaml#/$defs/port-base
>> +            unevaluatedProperties: false
>> +            description: the first LVDS input link
>> +
>> +            properties:
>> +              dual-lvds-odd-pixels:
>> +                type: boolean
>> +                description: the first sink port for odd pixels
>> +
>> +              dual-lvds-even-pixels:
>> +                type: boolean
>> +                description: the first sink port for even pixels
>> +
>> +            oneOf:
>> +              - required: [dual-lvds-odd-pixels]
>> +              - required: [dual-lvds-even-pixels]
>> +
>> +          port@1:
>> +            $ref: /schemas/graph.yaml#/$defs/port-base
>> +            unevaluatedProperties: false
>> +            description: the second LVDS input link
>> +
>> +            properties:
>> +              dual-lvds-even-pixels:
>> +                type: boolean
>> +                description: the second sink port for even pixels
>> +
>> +              dual-lvds-odd-pixels:
>> +                type: boolean
>> +                description: the second sink port for odd pixels
>> +
>> +            oneOf:
>> +              - required: [dual-lvds-even-pixels]
>> +              - required: [dual-lvds-odd-pixels]
>> +
>> +          port@2:
>> +            $ref: /schemas/graph.yaml#/properties/port
>> +            description: video port for the HDMI output
>> +
>> +          port@3:
>> +            $ref: /schemas/graph.yaml#/properties/port
>> +            description: sound input port
>> +
>> +        required:
>> +          - port@0
>> +          - port@1
>> +          - port@2
>> +
>> +        allOf:
>> +          - if:
>> +              properties:
>> +                port@0:
>> +                  required:
>> +                    - dual-lvds-odd-pixels
>> +            then:
>> +              properties:
>> +                port@1:
>> +                  properties:
>> +                    dual-lvds-odd-pixels: false
>> +
>> +          - if:
>> +              properties:
>> +                port@0:
>> +                  required:
>> +                    - dual-lvds-even-pixels
>> +            then:
>> +              properties:
>> +                port@1:
>> +                  properties:
>> +                    dual-lvds-even-pixels: false
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - ivdd-supply
>> +  - ovdd-supply
>> +  - txavcc18-supply
>> +  - txavcc33-supply
>> +  - pvcc1-supply
>> +  - pvcc2-supply
>> +  - avcc-supply
>> +  - anvdd-supply
>> +  - apvdd-supply
>> +  - ports
>> +
>> +additionalProperties: false
>> +

-- 
Regards,
Liu Ying





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