[PATCH v3 3/7] dt-bindings: display: bridge: Repurpose lvds-encoder
Fabrizio Castro
fabrizio.castro at bp.renesas.com
Fri Nov 8 09:26:22 UTC 2019
Hello Laurent,
Thank you for your feedback!
> From: linux-renesas-soc-owner at vger.kernel.org <linux-renesas-soc-owner at vger.kernel.org> On Behalf Of Laurent Pinchart
> Sent: 07 November 2019 20:38
> Subject: Re: [PATCH v3 3/7] dt-bindings: display: bridge: Repurpose lvds-encoder
>
> Hi Fabrizio,
>
> Thank you for the patch.
>
> On Thu, Nov 07, 2019 at 08:10:59PM +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, therefore adapt the dt-bindings to fit the
> > new purpose.
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro at bp.renesas.com>
> >
> > ---
> > v2->v3:
> > * Extracted conversion to lvds-codec as per Rob's comment
> > v1->v2:
> > * Converted to dt-schema as per Neil's comment
> > ---
> > .../bindings/display/bridge/lvds-codec.yaml | 120 +++++++++++++++++++++
> > .../bindings/display/bridge/lvds-transmitter.yaml | 91 ----------------
>
> -M1 would also help a lot here.
Will do
>
> > 2 files changed, 120 insertions(+), 91 deletions(-)
> > create mode 100644 Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > delete mode 100644 Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> b/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > new file mode 100644
> > index 0000000..3ebdf96
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml
> > @@ -0,0 +1,120 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/bridge/lvds-codec.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Transparent LVDS encoders and LVDS decoders
>
> s/LVDS decoders/decoders/ ?
Will replace
>
> > +
> > +maintainers:
> > + - Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> > +
> > +description: |
> > + This binding supports transparent LVDS encoders and LVDS decoders that don't
>
> Same here.
Will do
Thanks,
Fab
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>
> > + 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.
> > +
> > +properties:
> > + compatible:
> > + description: |
> > + Any encoder or decoder compatible with this generic binding, but with
> > + additional properties not listed here, must define its own binding and
> > + list a device specific compatible first followed by the generic compatible
> > + enum:
> > + - lvds-encoder # for LVDS encoders
> > + - lvds-decoder # for LVDS decoders
> > +
> > + ports:
> > + type: object
> > + description: |
> > + This device has two video ports. Their connections are modeled using the
> > + OF graph bindings specified in Documentation/devicetree/bindings/graph.txt
> > + properties:
> > + port at 0:
> > + type: object
> > + description: |
> > + With LVDS encoders port 0 is for parallel input
> > + With LVDS decoders port 0 is for LVDS input
> > +
> > + port at 1:
> > + type: object
> > + description: |
> > + With LVDS encoders port 1 is for LVDS output
> > + With LVDS decoders port 1 is for parallel output
> > +
> > + required:
> > + - port at 0
> > + - port at 1
> > +
> > +required:
> > + - compatible
> > + - ports
> > +
> > +examples:
> > + - |
> > + lvds-encoder {
> > + compatible = "lvds-encoder";
> > +
> > + ports {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + port at 0 {
> > + reg = <0>;
> > +
> > + lvds_enc_in: endpoint {
> > + remote-endpoint = <&display_out_rgb>;
> > + };
> > + };
> > +
> > + port at 1 {
> > + reg = <1>;
> > +
> > + lvds_enc_out: endpoint {
> > + remote-endpoint = <&lvds_panel_in>;
> > + };
> > + };
> > + };
> > + };
> > +
> > + - |
> > + lvds-decoder {
> > + compatible = "lvds-decoder";
> > +
> > + ports {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + port at 0 {
> > + reg = <0>;
> > +
> > + lvds_dec_in: endpoint {
> > + remote-endpoint = <&display_out_lvds>;
> > + };
> > + };
> > +
> > + port at 1 {
> > + reg = <1>;
> > +
> > + lvds_dec_out: endpoint {
> > + remote-endpoint = <&rgb_panel_in>;
> > + };
> > + };
> > + };
> > + };
> > +
> > +...
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> > deleted file mode 100644
> > index 5be163a..0000000
> > --- a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.yaml
> > +++ /dev/null
> > @@ -1,91 +0,0 @@
> > -# SPDX-License-Identifier: GPL-2.0
> > -%YAML 1.2
> > ----
> > -$id: http://devicetree.org/schemas/display/bridge/lvds-transmitter.yaml#
> > -$schema: http://devicetree.org/meta-schemas/core.yaml#
> > -
> > -title: Parallel to LVDS Encoder
> > -
> > -maintainers:
> > - - Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> > -
> > -description: |
> > - 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.
> > -
> > -properties:
> > - compatible:
> > - description: |
> > - Any encoder or decoder compatible with this generic binding, but with
> > - additional properties not listed here, must define its own binding and
> > - list a device specific compatible first followed by the generic compatible
> > - enum:
> > - - lvds-encoder
> > -
> > - ports:
> > - type: object
> > - description: |
> > - This device has two video ports. Their connections are modeled using the
> > - OF graph bindings specified in Documentation/devicetree/bindings/graph.txt
> > - properties:
> > - port at 0:
> > - type: object
> > - description: |
> > - Port 0 is for parallel input
> > -
> > - port at 1:
> > - type: object
> > - description: |
> > - Port 1 is for LVDS output
> > -
> > - required:
> > - - port at 0
> > - - port at 1
> > -
> > -required:
> > - - compatible
> > - - ports
> > -
> > -examples:
> > - - |
> > - lvds-encoder {
> > - compatible = "lvds-encoder";
> > -
> > - ports {
> > - #address-cells = <1>;
> > - #size-cells = <0>;
> > -
> > - port at 0 {
> > - reg = <0>;
> > -
> > - lvds_enc_in: endpoint {
> > - remote-endpoint = <&display_out_rgb>;
> > - };
> > - };
> > -
> > - port at 1 {
> > - reg = <1>;
> > -
> > - lvds_enc_out: endpoint {
> > - remote-endpoint = <&lvds_panel_in>;
> > - };
> > - };
> > - };
> > - };
> > -
> > -...
> > --
> > 2.7.4
> >
>
> --
> Regards,
>
> Laurent Pinchart
More information about the dri-devel
mailing list