Re: [PATCH 1/3] dt-bindings: display: amlogic, meson-dw-hdmi: convert to yaml

[Rob Herring <robh+dt@kernel.org>]

On Mon, Aug 5, 2019 at 7:43 AM Neil Armstrong <narmstrong@baylibre.com> wrote:
>
> Now that we have the DT validation in place, let's convert the device tree
> bindings for the Amlogic Synopsys DW-HDMI specifics over to YAML schemas.
>
> The original example and usage of clock-names uses a reversed "isfr"
> and "iahb" clock-names, the rewritten YAML bindings uses the reversed
> instead of fixing the device trees order.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../display/amlogic,meson-dw-hdmi.txt         | 119 -------------
>  .../display/amlogic,meson-dw-hdmi.yaml        | 160 ++++++++++++++++++
>  2 files changed, 160 insertions(+), 119 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.txt
>  create mode 100644 Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml

> diff --git a/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
> new file mode 100644
> index 000000000000..1212aa7a624f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
> @@ -0,0 +1,160 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2019 BayLibre, SAS
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/display/amlogic,meson-dw-hdmi.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Amlogic specific extensions to the Synopsys Designware HDMI Controller
> +
> +maintainers:
> +  - Neil Armstrong <narmstrong@baylibre.com>
> +
> +description: |
> +  The Amlogic Meson Synopsys Designware Integration is composed of
> +  - A Synopsys DesignWare HDMI Controller IP
> +  - A TOP control block controlling the Clocks and PHY
> +  - A custom HDMI PHY in order to convert video to TMDS signal
> +   ___________________________________
> +  |            HDMI TOP               |<= HPD
> +  |___________________________________|
> +  |                  |                |
> +  |  Synopsys HDMI   |   HDMI PHY     |=> TMDS
> +  |    Controller    |________________|
> +  |___________________________________|<=> DDC
> +
> +  The HDMI TOP block only supports HPD sensing.
> +  The Synopsys HDMI Controller interrupt is routed through the
> +  TOP Block interrupt.
> +  Communication to the TOP Block and the Synopsys HDMI Controller is done
> +  via a pair of dedicated addr+read/write registers.
> +  The HDMI PHY is configured by registers in the HHI register block.
> +
> +  Pixel data arrives in "4:4:4" format from the VENC block and the VPU HDMI mux
> +  selects either the ENCI encoder for the 576i or 480i formats or the ENCP
> +  encoder for all the other formats including interlaced HD formats.
> +
> +  The VENC uses a DVI encoder on top of the ENCI or ENCP encoders to generate
> +  DVI timings for the HDMI controller.
> +
> +  Amlogic Meson GXBB, GXL and GXM SoCs families embeds the Synopsys DesignWare
> +  HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
> +  audio source interfaces.
> +
> +  The following table lists for each supported model the port number
> +  corresponding to each HDMI output and input.
> +
> +                  Port 0                 Port 1
> +  -----------------------------------------
> +   S905 (GXBB)   VENC Input    TMDS Output
> +   S905X (GXL)   VENC Input    TMDS Output
> +   S905D (GXL)   VENC Input    TMDS Output
> +   S912 (GXM)      VENC Input  TMDS Output
> +   S905X2 (G12A)       VENC Input      TMDS Output
> +   S905Y2 (G12A)       VENC Input      TMDS Output
> +   S905D2 (G12A)       VENC Input      TMDS Output

Does this ever change?

> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - amlogic,meson-gxbb-dw-hdmi # GXBB (S905)
> +              - amlogic,meson-gxl-dw-hdmi # GXL (S905X, S905D)
> +              - amlogic,meson-gxm-dw-hdmi # GXM (S912)
> +          - const: amlogic,meson-gx-dw-hdmi
> +      - enum:
> +          - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, S905D2)
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: isfr
> +      - const: iahb
> +      - const: venci
> +
> +  resets:
> +    minItems: 3
> +
> +  reset-names:
> +    items:
> +      - const: hdmitx_apb
> +      - const: hdmitx
> +      - const: hdmitx_phy
> +
> +  hdmi-supply:
> +    description: phandle to an external 5V regulator to power the HDMI logic
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/phandle
> +
> +  port@0:
> +    type: object
> +    description:
> +      A port node modeled using the OF graph
> +      bindings specified in Documentation/devicetree/bindings/graph.txt.

Would be better to say this is the VENC (or ...? input and drop the
reference (as I expect graph.txt will be replaced with graph.yaml).

> +
> +  port@1:
> +    type: object
> +    description:
> +      A port node modeled using the OF graph
> +      bindings specified in Documentation/devicetree/bindings/graph.txt.
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - resets
> +  - reset-names
> +  - port@0
> +  - port@1
> +  - "#address-cells"
> +  - "#size-cells"

Should be able to add an 'additionalProperties: false' here.

> +
> +examples:
> +  - |
> +    hdmi_tx: hdmi-tx@c883a000 {
> +        compatible = "amlogic,meson-gxbb-dw-hdmi", "amlogic,meson-gx-dw-hdmi";
> +        reg = <0xc883a000 0x1c>;
> +        interrupts = <57>;
> +        resets = <&reset_apb>, <&reset_hdmitx>, <&reset_hdmitx_phy>;
> +        reset-names = "hdmitx_apb", "hdmitx", "hdmitx_phy";
> +        clocks = <&clk_isfr>, <&clk_iahb>, <&clk_venci>;
> +        clock-names = "isfr", "iahb", "venci";
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        /* VPU VENC Input */
> +        hdmi_tx_venc_port: port@0 {
> +            reg = <0>;
> +
> +            hdmi_tx_in: endpoint {
> +                remote-endpoint = <&hdmi_tx_out>;
> +            };
> +        };
> +
> +        /* TMDS Output */
> +        hdmi_tx_tmds_port: port@1 {
> +             reg = <1>;
> +
> +             hdmi_tx_tmds_out: endpoint {
> +                 remote-endpoint = <&hdmi_connector_in>;
> +             };
> +        };
> +    };
> +
> --
> 2.22.0
>

_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic