Re: [PATCH 1/2] dt-bindings: display: bridge: Document RZ/G2L MIPI DSI TX bindings

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On Wed, Mar 23, 2022 at 06:26:31PM +0000, Biju Das wrote:
> Hi Rob,
> 
> Thanks for the feedback.
> 
> > Subject: Re: [PATCH 1/2] dt-bindings: display: bridge: Document RZ/G2L
> > MIPI DSI TX bindings
> > 
> > On Mon, Mar 14, 2022 at 04:10:02PM +0000, Biju Das wrote:
> > > The RZ/G2L MIPI DSI TX is embedded in the Renesas RZ/G2L family SoC's.
> > > It can operate in DSI mode, with up to four data lanes.
> > >
> > > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > > ---
> > > RFC->v1:
> > >  * Added a ref to dsi-controller.yaml.
> > > RFC:-
> > >  *
> > > ---
> > >  .../bindings/display/bridge/renesas,dsi.yaml  | 146
> > > ++++++++++++++++++
> > >  1 file changed, 146 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> > > b/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> > > new file mode 100644
> > > index 000000000000..74bc3782d230
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yam
> > > +++ l
> > > @@ -0,0 +1,146 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > > +---
> > > +$id:
> > > +
> > > +title: Renesas RZ/G2L MIPI DSI Encoder
> > > +
> > > +maintainers:
> > > +  - Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > > +
> > > +description: |
> > > +  This binding describes the MIPI DSI encoder embedded in the Renesas
> > > +  RZ/G2L family of SoC's. The encoder can operate in DSI mode with up
> > > +  to four data lanes.
> > > +
> > > +allOf:
> > > +  - $ref: ../dsi-controller.yaml#
> > 
> > Full path preferred:
> > 
> > /schemas/display/dsi-controller.yaml#
> 
> OK. Will fix this.
> 
> > 
> > > +
> > > +properties:
> > > +  compatible:
> > > +    enum:
> > > +      - renesas,rzg2l-mipi-dsi # RZ/G2L and RZ/V2L
> > > +
> > > +  reg:
> > > +    items:
> > > +      - description: Link register
> > > +      - description: D-PHY register
> > 
> > D-PHY is not a separate block?
> 
> Basically D-PHY is integrated inside MIPI-DSI Tx module.
> 
> MIPI-DSI Tx module consists of MIPI DSI-2 Host controller (LINK)
> and MIPI D-PHY Tx(D-PHY).
> 
> That is the reason I have modelled like this.
> 
> Is this model ok or am I missing something here? Please let me know.

I don't know the details of the h/w so I can't say. We do see blocks 
with a phy modeled as 1 block only to need to separate them when the phy 
part changes in the next process node. I imagine we have it done both 
ways for DSI + D-PHY.

Rob



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