RE: [PATCH 2/4] dt-bindings: display: bridge: Repurpose lvds-encoder

[Fabrizio Castro <fabrizio.castro@bp.renesas.com>]

Hi Neil,

Thank you for your feedback!

> From: Neil Armstrong <narmstrong@baylibre.com>
> Sent: 04 November 2019 09:17
> Subject: Re: [PATCH 2/4] dt-bindings: display: bridge: Repurpose lvds-encoder
> 
> Hi,
> 
> 
> On 30/10/2019 14:43, 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, therefore adapt the dt-bindings to fit the
> > new purpose.
> 
> You should convert it to dt-schemas in this case.

Will do.

Thanks,
Fab

> 
> Neil
> 
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
> > ---
> >  .../bindings/display/bridge/lvds-codec.txt         | 100 +++++++++++++++++++++
> >  .../bindings/display/bridge/lvds-transmitter.txt   |  66 --------------
> >  2 files changed, 100 insertions(+), 66 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/display/bridge/lvds-codec.txt
> >  delete mode 100644 Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-codec.txt
> b/Documentation/devicetree/bindings/display/bridge/lvds-codec.txt
> > new file mode 100644
> > index 0000000..45fd81c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/lvds-codec.txt
> > @@ -0,0 +1,100 @@
> > +Trasnparent LVDS encoders and LVDS decoders
> > +-------------------------------------------
> > +
> > +This binding supports transparent LVDS encoders and LVDS 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
> > +to LVDS panels. This binding targets devices compatible with the following
> > +specifications only.
> > +
> > +[JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
> > +1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
> > +[LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
> > +Semiconductor
> > +[VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
> > +Electronics Standards Association (VESA)
> > +
> > +Those devices have been marketed under the FPD-Link and FlatLink brand names
> > +among others.
> > +
> > +
> > +Required properties:
> > +
> > +- compatible: Must be "lvds-encoder" for LVDS encoders or "lvds-decoder" for
> > +              LVDS decoders.
> > +
> > +  Any encoder compatible with this generic binding, but with additional
> > +  properties not listed here, must list a device specific compatible first
> > +  followed by the generic compatible.
> > +
> > +Required nodes:
> > +
> > +This device has two video ports. Their connections are modeled using the OF
> > +graph bindings specified in Documentation/devicetree/bindings/graph.txt.
> > +
> > +For LVDS encoders:
> > +- Video port 0 for parallel input
> > +- Video port 1 for LVDS output
> > +
> > +For LVDS decoders:
> > +- Video port 0 for LVDS input
> > +- Video port 1 for parallel output
> > +
> > +
> > +LVDS encoder example
> > +--------------------
> > +
> > +lvds-encoder {
> > +	compatible = "lvds-encoder";
> > +
> > +	ports {
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +
> > +		port@0 {
> > +			reg = <0>;
> > +
> > +			lvds_enc_in: endpoint {
> > +				remote-endpoint = <&display_out_rgb>;
> > +			};
> > +		};
> > +
> > +		port@1 {
> > +			reg = <1>;
> > +
> > +			lvds_enc_out: endpoint {
> > +				remote-endpoint = <&lvds_panel_in>;
> > +			};
> > +		};
> > +	};
> > +};
> > +
> > +LVDS decoder example
> > +--------------------
> > +
> > +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>;
> > +			};
> > +		};
> > +	};
> > +};
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt
> b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt
> > deleted file mode 100644
> > index 60091db..0000000
> > --- a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt
> > +++ /dev/null
> > @@ -1,66 +0,0 @@
> > -Parallel to LVDS Encoder
> > -------------------------
> > -
> > -This binding supports the parallel to LVDS encoders 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
> > -to LVDS panels. This binding targets devices compatible with the following
> > -specifications only.
> > -
> > -[JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
> > -1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
> > -[LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
> > -Semiconductor
> > -[VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
> > -Electronics Standards Association (VESA)
> > -
> > -Those devices have been marketed under the FPD-Link and FlatLink brand names
> > -among others.
> > -
> > -
> > -Required properties:
> > -
> > -- compatible: Must be "lvds-encoder"
> > -
> > -  Any encoder compatible with this generic binding, but with additional
> > -  properties not listed here, must list a device specific compatible first
> > -  followed by this generic compatible.
> > -
> > -Required nodes:
> > -
> > -This device has two video ports. Their connections are modeled using the OF
> > -graph bindings specified in Documentation/devicetree/bindings/graph.txt.
> > -
> > -- Video port 0 for parallel input
> > -- Video port 1 for LVDS output
> > -
> > -
> > -Example
> > --------
> > -
> > -lvds-encoder {
> > -	compatible = "lvds-encoder";
> > -
> > -	ports {
> > -		#address-cells = <1>;
> > -		#size-cells = <0>;
> > -
> > -		port@0 {
> > -			reg = <0>;
> > -
> > -			lvds_enc_in: endpoint {
> > -				remote-endpoint = <&display_out_rgb>;
> > -			};
> > -		};
> > -
> > -		port@1 {
> > -			reg = <1>;
> > -
> > -			lvds_enc_out: endpoint {
> > -				remote-endpoint = <&lvds_panel_in>;
> > -			};
> > -		};
> > -	};
> > -};
> >