linux-kernel - Re: [PATCH 1/2] dt-bindings: media: i2c: add galaxycore,gc2145 DVP bus support

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Date: Tue, 20 Feb 2024 10:46:23 +0000
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: Andrey Skvortsov <andrej.skvortzov@...il.com>
Cc: Alain Volmat <alain.volmat@...s.st.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-media@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ondřej Jirman <megi@....cz>,
	Pavel Machek <pavel@....cz>,
	Arnaud Ferraris <arnaud.ferraris@...labora.com>
Subject: Re: [PATCH 1/2] dt-bindings: media: i2c: add galaxycore,gc2145 DVP
 bus support

Hi Andrey,

Thanks for the patchset.

On Sun, Feb 18, 2024 at 01:03:07AM +0300, Andrey Skvortsov wrote:
> Don't require link-frequencies like it's done for ov5640, that
> supports both CSI-2 and DVP. And v4l2_fwnode_endpoint_alloc_parse
> ignores link-frequencies property for DVP endpoint. It's used only for
> CSI-2 endpoints
> 
> Signed-off-by: Andrey Skvortsov <andrej.skvortzov@...il.com>
> ---
>  .../bindings/media/i2c/galaxycore,gc2145.yaml | 33 +++++++++++++++++--
>  1 file changed, 30 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> index 1726ecca4c77..fb376b9d0f2a 100644
> --- a/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> +++ b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> @@ -61,9 +61,6 @@ properties:
>          properties:
>            link-frequencies: true
>  
> -        required:
> -          - link-frequencies

That seems like a bad idea to me.

While for parallel interface it may not be often important, for CSI-2 it
should stay.

> -
>      required:
>        - endpoint
>  
> @@ -110,4 +107,34 @@ examples:
>          };
>      };
>  
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        camera@3c {
> +            compatible = "galaxycore,gc2145";
> +            reg = <0x3c>;
> +            clocks = <&clk_ext_camera>;
> +            iovdd-supply = <&scmi_v3v3_sw>;
> +            avdd-supply = <&scmi_v3v3_sw>;
> +            dvdd-supply = <&scmi_v3v3_sw>;
> +            powerdown-gpios = <&mcp23017 3 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
> +            reset-gpios = <&mcp23017 4 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
> +
> +            port {
> +                endpoint {
> +                    remote-endpoint = <&parallel_from_gc2145>;
> +                    bus-width = <8>;
> +                    hsync-active = <1>;
> +                    vsync-active = <1>;
> +                    data-active = <1>;
> +                    pclk-sample = <1>;

Are there defaults for these if there are no such properties?

> +                };
> +            };
> +        };
> +    };
> +
>  ...

-- 
Regards,

Sakari Ailus