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

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Date: Thu, 22 Feb 2024 08:52:23 +0300
From: Andrey Skvortsov <andrej.skvortzov@...il.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.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

On 24-02-20 10:46, Sakari Ailus wrote:
> 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.

I'll add this type and make link-frequencies required based on that
for CSI-2 bus.

> 
> > -
> >      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?

good point. I'll add them to the endpoint properties description then.

-- 
Best regards,
Andrey Skvortsov