linux-kernel - RE: [PATCH v3 1/7] dt-bindings: media: nxp: Add support for FSD SoC

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Message-ID: <024f01dc27cb$f167d370$d4377a50$@samsung.com>
Date: Wed, 17 Sep 2025 17:39:35 +0530
From: "Inbaraj E" <inbaraj.e@...sung.com>
To: "'Rob Herring'" <robh@...nel.org>
Cc: <rmfrfs@...il.com>, <laurent.pinchart@...asonboard.com>,
	<martink@...teo.de>, <kernel@...i.sm>, <mchehab@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <shawnguo@...nel.org>,
	<s.hauer@...gutronix.de>, <kernel@...gutronix.de>, <festevam@...il.com>,
	<linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<imx@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-samsung-soc@...r.kernel.org>,
	<pankaj.dubey@...sung.com>, <ravi.patel@...sung.com>,
	<shradha.t@...sung.com>
Subject: RE: [PATCH v3 1/7] dt-bindings: media: nxp: Add support for FSD SoC

Hi Rob,

Thanks for the review


> > +    description:
> > +      Syscon used to hold and release the reset of MIPI D-PHY
> 
> Reset? Sounds like you should be using the reset binding.

The Tesla FSD Soc does not have a dedicated reset controller. Instead, we
are using the
system controller which is MMIO Space handled by syscon driver, to assert or
de-assert the D-PHY
reset. So, I prefer to use syscon.

> 
> > +
> >    phy-supply:
> >      description: The MIPI D-PHY digital power supply
> >
> > @@ -93,7 +91,8 @@ properties:
> >              properties:
> >                data-lanes:
> >                  description:
> > -                  Note that 'fsl,imx7-mipi-csi2' only supports up to 2
data lines.
> > +                  Note that 'fsl,imx7-mipi-csi2' only supports up to 2
data
> > +                  lines.
> 
> Reformatting should be a separate patch.

Sure, I'll add new patch in next patchset.

> 
> >                  minItems: 1
> >                  items:
> >                    - const: 1
> > @@ -115,7 +114,6 @@ required:
> >    - interrupts
> >    - clocks
> >    - clock-names
> > -  - power-domains
> >    - ports
> >
> >  additionalProperties: false
> > @@ -124,20 +122,73 @@ allOf:
> >    - if:
> >        properties:
> >          compatible:
> > -          contains:
> > -            const: fsl,imx7-mipi-csi2
> > +          const: fsl,imx7-mipi-csi2
> 
> 'contains' was correct. It is more future proof when there is another SoC
that
> is backwards compatible with imx7.

Sure, I'll add new patch in next patchset.

> 
> >      then:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: The peripheral clock (a.k.a. APB clock)
> > +            - description: The external clock (optionally used as the
pixel
> > +                clock)
> > +            - description: The MIPI D-PHY clock
> > +        clock-names:
> > +          items:
> > +            - const: pclk
> > +            - const: wrap
> > +            - const: phy
> > +        tesla,syscon-csis: false
> > +        fsl,num-channels: false
> 
> blank line

Will remove in nextpatchset.

> 
> >        required:
> > +        - power-domains
> >          - phy-supply
> >          - resets
> > -    else:
> > +
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          const: fsl,imx8mm-mipi-csi2
> > +    then:
> >        properties:
> >          clocks:
> > -          minItems: 4
> > +          items:
> > +            - description: The peripheral clock (a.k.a. APB clock)
> > +            - description: The external clock (optionally used as the
pixel
> > +                clock)
> > +            - description: The MIPI D-PHY clock
> > +            - description: The AXI clock
> >          clock-names:
> > -          minItems: 4
> > +          items:
> > +            - const: pclk
> > +            - const: wrap
> > +            - const: phy
> > +            - const: axi
> > +        tesla,syscon-csis: false
> > +        fsl,num-channels: false
> >          phy-supply: false
> >          resets: false
> 
> blank line
> 
> > +      required:
> > +        - power-domains
> > +
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          const: tesla,fsd-mipi-csi2
> > +    then:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: The peripheral clock (a.k.a. APB clock)
> > +            - description: The DMA clock
> 
> Wouldn't this be the same as the "AXI clock"?

According to v4.3 manual it is DMA clock.

> 
> > +        clocks-names:
> > +          items:
> > +            - const: pclk
> > +            - const: aclk
> > +        phy-supply: false
> > +        resets: false
> > +        power-domains: false
> 
> blank line

Sure will remove in next patchset.
> 
> > +      required:
> > +        - tesla,syscon-csis
> > +        - fsl,num-channels
> >
> >  examples:
> >    - |
> > --
> > 2.49.0
> >

Regards,
Inbaraj E