[PATCH v2 3/6] dt-bindings: display: imx: hdmi: Convert binding to YAML
Philipp Zabel
p.zabel at pengutronix.de
Wed Jan 6 14:10:32 UTC 2021
Hi Laurent,
On Tue, 2021-01-05 at 13:50 +0200, Laurent Pinchart wrote:
> Hi Philipp,
>
> On Tue, Jan 05, 2021 at 10:32:01AM +0100, Philipp Zabel wrote:
> > On Tue, 2021-01-05 at 07:49 +0200, Laurent Pinchart wrote:
> > > On Mon, Jan 04, 2021 at 04:30:36PM +0100, Philipp Zabel wrote:
> > > > On Sun, 2020-12-20 at 21:50 +0200, Laurent Pinchart wrote:
> > > > > Convert the i.MX6 HDMI TX text binding to YAML.
> > > > >
> > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> > > > > ---
> > > > > Changes since v1:
> > > > >
> > > > > - Only specify maxItems for clocks
> > > > > - Drop reg and interrupts as they're checked in the base schema
> > > > > - Rebase on top of OF graph schema, dropped redundant properties
> > > > > - Fix identation for enum entries
> > > > > - Drop clock-names items, use maxItems only
> > > > > ---
> > > > > .../bindings/display/imx/fsl,imx6-hdmi.yaml | 130 ++++++++++++++++++
> > > > > .../devicetree/bindings/display/imx/hdmi.txt | 65 ---------
> > > > > 2 files changed, 130 insertions(+), 65 deletions(-)
> > > > > create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx6-hdmi.yaml
> > > > > delete mode 100644 Documentation/devicetree/bindings/display/imx/hdmi.txt
> > > > >
> > > > > diff --git a/Documentation/devicetree/bindings/display/imx/fsl,imx6-hdmi.yaml b/Documentation/devicetree/bindings/display/imx/fsl,imx6-hdmi.yaml
> > > > > new file mode 100644
> > > > > index 000000000000..f9b131bb3339
> > > > > --- /dev/null
> > > > > +++ b/Documentation/devicetree/bindings/display/imx/fsl,imx6-hdmi.yaml
> > > > > @@ -0,0 +1,130 @@
> > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > > +%YAML 1.2
> > > > > +---
> > > > > +$id: http://devicetree.org/schemas/display/imx/fsl,imx6-hdmi.yaml#
> > > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > > +
> > > > > +title: Freescale i.MX6 DWC HDMI TX Encoder
> > > > > +
> > > > > +maintainers:
> > > > > + - Philipp Zabel <p.zabel at pengutronix.de>
> > > > > +
> > > > > +description: |
> > > > > + The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> > > > > + with a companion PHY IP.
> > > > > +
> > > > > +allOf:
> > > > > + - $ref: ../bridge/synopsys,dw-hdmi.yaml#
> > > > > +
> > > > > +properties:
> > > > > + compatible:
> > > > > + enum:
> > > > > + - fsl,imx6dl-hdmi
> > > > > + - fsl,imx6q-hdmi
> > > > > +
> > > > > + reg-io-width:
> > > > > + const: 1
> > > > > +
> > > > > + clocks:
> > > > > + maxItems: 2
> > > > > +
> > > > > + clock-names:
> > > > > + maxItems: 2
> > > > > +
> > > > > + ddc-i2c-bus:
> > > > > + $ref: /schemas/types.yaml#/definitions/phandle
> > > > > + description:
> > > > > + The HDMI DDC bus can be connected to either a system I2C master or the
> > > > > + functionally-reduced I2C master contained in the DWC HDMI. When connected
> > > > > + to a system I2C master this property contains a phandle to that I2C
> > > > > + master controller.
> > > > > +
> > > > > + gpr:
> > > > > + $ref: /schemas/types.yaml#/definitions/phandle
> > > > > + description:
> > > > > + phandle to the iomuxc-gpr region containing the HDMI multiplexer control
> > > > > + register.
> > > > > +
> > > > > + ports:
> > > > > + $ref: /schemas/graph.yaml#/properties/ports
> > > > > + description: |
> > > > > + This device has four video ports, corresponding to the four inputs of the
> > > > > + HDMI multiplexer. Each port shall have a single endpoint.
> > > > > +
> > > > > + properties:
> > > > > + port at 0:
> > > > > + $ref: /schemas/graph.yaml#/$defs/port-base
> > > > > + unevaluatedProperties: false
> > > > > + description: First input of the HDMI multiplexer
> > > > > +
> > > > > + port at 1:
> > > > > + $ref: /schemas/graph.yaml#/$defs/port-base
> > > > > + unevaluatedProperties: false
> > > > > + description: Second input of the HDMI multiplexer
> > > > > +
> > > > > + port at 2:
> > > > > + $ref: /schemas/graph.yaml#/$defs/port-base
> > > > > + unevaluatedProperties: false
> > > > > + description: Third input of the HDMI multiplexer
> > > > > +
> > > > > + port at 3:
> > > > > + $ref: /schemas/graph.yaml#/$defs/port-base
> > > > > + unevaluatedProperties: false
> > > > > + description: Fourth input of the HDMI multiplexer
> > > > > +
> > > > > + anyOf:
> > > > > + - required:
> > > > > + - port at 0
> > > > > + - required:
> > > > > + - port at 1
> > > > > + - required:
> > > > > + - port at 2
> > > > > + - required:
> > > > > + - port at 3
> > > > > +
> > > > > +required:
> > > > > + - compatible
> > > > > + - reg
> > > > > + - clocks
> > > > > + - clock-names
> > > > > + - gpr
> > > > > + - interrupts
> > > > > + - ports
> >
> > The binding marks the "ports" container node as required.
> >
> > > > Won't this break validation of current i.MX6 DTs, which don't use the
> > > > ports node (in imx6q(dl).dtsi)?
> > >
> > > I may be missing something, but in imx6qdl.dtsi, we have
> >
> > [...]
> >
> > > and in imx6q.dtsi,
> > >
> > > &hdmi {
> > > compatible = "fsl,imx6q-hdmi";
> > >
> > > port at 2 {
> > > reg = <2>;
> > >
> > > hdmi_mux_2: endpoint {
> > > remote-endpoint = <&ipu2_di0_hdmi>;
> > > };
> > > };
> > >
> > > port at 3 {
> > > reg = <3>;
> > >
> > > hdmi_mux_3: endpoint {
> > > remote-endpoint = <&ipu2_di1_hdmi>;
> > > };
> > > };
> > > };
> > >
> > > There are no other occurrences of "fsl,imx6q-hdmi" than in imx6q.dtsi
> > > (and no occurrences of "fsl,imx6qdl-hdmi" at all).
> >
> > The port@[0-3] nodes are currently direct children of the &hdmi node,
> > without the "ports" container node.
>
> Of course. Sorry, I've missed that that was the point.
>
> I can include a patch to update imx6q(dl).dtsi in the series. Would that
> work for you ?
Yes, that would work, thank you. Is the goal to slowly phase out all
uses of multi-port bindings without the ports node?
regards
Philipp
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