Hi Laurent,
Thank you for your feedback!
> From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Sent: 19 November 2019 00:08
> Subject: Re: [PATCH v4 08/13] dt-bindings: display: bridge: Repurpose lvds-encoder
>
> Hi Fabrizio,
>
> Thank you for the patch.
>
> On Wed, Nov 13, 2019 at 03:51:27PM +0000, Fabrizio Castro wrote:
> > In an effort to repurpose lvds-encoder.c to also serve the
> > function of LVDS decoders, we ended up defining a new "generic"
> > compatible string ("lvds-decoder"), therefore adapt the dt schema
> > to allow for the new compatible string.
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro@xxxxxxxxxxxxxx>
> >
> > ---
> > v3->v4:
> > * Improved title and description according to Laurent's comments
> > * Reworked definition of the compatible property
> > v2->v3:
> > * Extracted conversion to lvds-codec as per Rob's comment
> > v1->v2:
> > * Converted to dt-schema as per Neil's comment
> > ---
> > .../{lvds-transmitter.yaml => lvds-codec.yaml} | 54 +++++++++++++++++-----
> > 1 file changed, 42 insertions(+), 12 deletions(-)
> > rename Documentation/devicetree/bindings/display/bridge/{lvds-transmitter.yaml => lvds-codec.yaml} (61%)
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> b/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > similarity index 61%
> > rename from Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> > rename to Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > index 27de616..0ecc8a4 100644
> > --- a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> > +++ b/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > @@ -1,17 +1,17 @@
> > # SPDX-License-Identifier: GPL-2.0
> > %YAML 1.2
> > ---
> > -$id: http://devicetree.org/schemas/display/bridge/lvds-transmitter.yaml#
> > +$id: http://devicetree.org/schemas/display/bridge/lvds-codec.yaml#
> > $schema: http://devicetree.org/meta-schemas/core.yaml#
> >
> > -title: Parallel to LVDS Encoder
> > +title: Transparent LVDS encoders and decoders
> >
> > maintainers:
> > - Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> >
> > description: |
> > - This binding supports the parallel to LVDS encoders that don't require any
> > - configuration.
> > + This binding supports transparent LVDS encoders and decoders that don't
> > + require any configuration.
> >
> > LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
> > incompatible data link layers have been used over time to transmit image data
> > @@ -33,12 +33,14 @@ properties:
> > description: |
> > Must list the device specific compatible string first, followed by the
> > generic compatible string.
> > - items:
> > - - enum:
> > - - ti,ds90c185 # For the TI DS90C185 FPD-Link Serializer
> > - - ti,ds90c187 # For the TI DS90C187 FPD-Link Serializer
> > - - ti,sn75lvds83 # For the TI SN75LVDS83 FlatLink transmitter
> > - - const: lvds-encoder # Generic LVDS encoder compatible fallback
> > + oneOf:
> > + - items:
> > + - enum:
> > + - ti,ds90c185 # For the TI DS90C185 FPD-Link Serializer
> > + - ti,ds90c187 # For the TI DS90C187 FPD-Link Serializer
> > + - ti,sn75lvds83 # For the TI SN75LVDS83 FlatLink transmitter
> > + - const: lvds-encoder # Generic LVDS encoder compatible fallback
> > + - const: lvds-decoder # Generic LVDS decoders compatible fallback
> >
> > ports:
> > type: object
> > @@ -49,12 +51,14 @@ properties:
> > port@0:
> > type: object
> > description: |
> > - Port 0 is for parallel input
> > + With LVDS encoders port 0 is for parallel input
> > + With LVDS decoders port 0 is for LVDS input
>
> How about
>
> For LVDS encoders, port 0 is the parallel input
> For LVDS decoders, port 0 is the LVDS input
It's ok with me
>
> >
> > port@1:
> > type: object
> > description: |
> > - Port 1 is for LVDS output
> > + With LVDS encoders port 1 is for LVDS output
> > + With LVDS decoders port 1 is for parallel output
>
> And similarly here ?
Here too
>
> If you're fine with this change there's no need to resubmit, I'll change
> this when applying, and
Yes please.
Thanks,
Fab
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
> >
> > required:
> > - port@0
> > @@ -96,4 +100,30 @@ examples:
> > };
> > };
> >
> > + - |
> > + lvds-decoder {
> > + compatible = "lvds-decoder";
> > +
> > + ports {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + port@0 {
> > + reg = <0>;
> > +
> > + lvds_dec_in: endpoint {
> > + remote-endpoint = <&display_out_lvds>;
> > + };
> > + };
> > +
> > + port@1 {
> > + reg = <1>;
> > +
> > + lvds_dec_out: endpoint {
> > + remote-endpoint = <&rgb_panel_in>;
> > + };
> > + };
> > + };
> > + };
> > +
> > ...
>
> --
> Regards,
>
> Laurent Pinchart
