Re: [PATCH v2 1/2] dt-bindings: display: Add Sharp Memory LCD bindings

[Alex Lanzano]

On Sat, Jul 27, 2024 at 11:06:05AM GMT, Krzysztof Kozlowski wrote:
> On 26/07/2024 21:44, Alex Lanzano wrote:
> > Add device tree bindings for the monochrome Sharp Memory LCD
> > 
> > Signed-off-by: Alex Lanzano <lanzano.alex@xxxxxxxxx>
> > Co-developed-by: Mehdi Djait <mehdi.djait@xxxxxxxxxxx>
> > Signed-off-by: Mehdi Djait <mehdi.djait@xxxxxxxxxxx>
> 
> The order of tags is incorrect. Who developed it first? Please read at
> Submitting patches - it explained this case quite precisely.
> 

Will fix!

> > ---
> >  .../bindings/display/sharp,ls010b7dh04.yaml   | 94 +++++++++++++++++++
> >  1 file changed, 94 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml b/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml
> > new file mode 100644
> > index 000000000000..79bde7bf0d7d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml
> > @@ -0,0 +1,94 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/sharp,ls010b7dh04.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Sharp Memory LCD panels
> > +
> > +maintainers:
> > +  - Alex Lanzano <lanzano.alex@xxxxxxxxx>
> > +
> > +description:
> > +  Sharp Memory LCDs are a series of monochrome displays that operate over
> > +  a SPI bus when the chip select is high. The displays require a signal (VCOM)
> > +  to be generated to prevent DC bias build up resulting in pixels being
> > +  unable to change. Three modes can be used to provide the VCOM signal
> > +  ("software", "external", "pwm").
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - sharp,ls010b7dh04
> > +      - sharp,ls011b7dh03
> > +      - sharp,ls012b7dd01
> > +      - sharp,ls013b7dh03
> > +      - sharp,ls013b7dh05
> > +      - sharp,ls018b7dh02
> > +      - sharp,ls027b7dh01
> > +      - sharp,ls027b7dh01a
> > +      - sharp,ls032b7dd02
> > +      - sharp,ls044q7dh01
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  spi-cs-high: true
> 
> <form letter>
> This is a friendly reminder during the review process.
> 
> It seems my or other reviewer's previous comments were not fully
> addressed. Maybe the feedback got lost between the quotes, maybe you
> just forgot to apply it. Please go back to the previous discussion and
> either implement all requested changes or keep discussing them.
> 
> Thank you.
> </form letter>
> 

My apologies! I must've missed the comment on this line. I replied to this
on the v1 thread

> > +
> > +  spi-max-frequency:
> > +    maximum: 2000000
> > +
> > +  sharp,vcom-mode:
> > +    $ref: /schemas/types.yaml#/definitions/string
> > +    description: |
> > +      software - This mode relies on a software operation to send a
> > +      "maintain display" message to the display, toggling the vcom
> > +      bit on and off with each message
> > +
> > +      external - This mode relies on an external clock to generate
> > +      the signal on the EXTCOMM pin
> 
> External clock? Then you might be missing clocks property.

This is to handle the case where a clock IC or other signal generator IC is provided
on the display module itself. So I don't believe the clocks property would be 
needed.

> > +
> > +      pwm - This mode relies on a pwm device to generate the signal
> > +      on the EXTCOMM pin
> 
> That's an enum. Otherwise why "pony" would be a correct vcom-mode?
> 

Will fix!

> > +
> > +  enable-gpios: true
> > +
> > +  pwms:
> > +    maxItems: 1
> > +    description: External VCOM signal
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - spi-cs-high
> > +  - sharp,vcom-mode
> > +
> > +allOf:
> > +  - $ref: panel/panel-common.yaml#
> > +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> > +
> > +  - if:
> > +      properties:
> > +        sharp,vcom-mode:
> > +          const: pwm
> > +    then:
> > +      required:
> > +        - pwms
> > +
> > +additionalProperties: false
> 
> Instead:
> unevaluatedProperties: false
> 

Will fix!

> > +
> > +examples:
> > +  - |
> > +    spi {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        display@0{
> 
> Missing space (see DTS coding style or any DTS)
> 

Will Fix!

> > +            compatible = "sharp,ls013b7dh03";
> > +            reg = <0>;
> > +            spi-cs-high;
> > +            spi-max-frequency = <1000000>;
> > +            sharp,vcom-mode = "software";
> > +        };
> > +    };
> > +...
> 
> Best regards,
> Krzysztof
> 

Again, thank you for taking the time to review.

Best regards,
Alex