Re: [PATCH v3 02/12] dt-bindings: display: mediatek: add MT8195 hdmi bindings

Krzysztof Kozlowski
2022-11-07T10:03:20Z

On 04/11/2022 15:09, Guillaume Ranquet wrote:
> Add mt8195 SoC bindings for hdmi and hdmi-ddc
>
> On mt8195 the ddc i2c controller is part of the hdmi IP block and thus has no
> specific register range, power domain or interrupt, making it simpler
> than its the legacy "mediatek,hdmi-ddc" binding.
>
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> ---
> .../bindings/display/mediatek/mediatek,hdmi.yaml | 61 ++++++++++++++++++----
> .../display/mediatek/mediatek,mt8195-hdmi-ddc.yaml | 51 ++++++++++++++++++
> 2 files changed, 101 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml
> index bdaf0b51e68c..9710b7b6e9bf 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml
> @@ -21,6 +21,7 @@ properties:
> - mediatek,mt7623-hdmi
> - mediatek,mt8167-hdmi
> - mediatek,mt8173-hdmi
> + - mediatek,mt8195-hdmi
>
> reg:
> maxItems: 1
> @@ -29,18 +30,12 @@ properties:
> maxItems: 1
>
> clocks:
> - items:
> - - description: Pixel Clock
> - - description: HDMI PLL
> - - description: Bit Clock
> - - description: S/PDIF Clock
> + minItems: 4

Drop minItems, it's not needed when equal to maxItems.

> + maxItems: 4
>
> clock-names:
> - items:
> - - const: pixel
> - - const: pll
> - - const: bclk
> - - const: spdif
> + minItems: 4

Drop minItems, it's not needed when equal to maxItems.

> + maxItems: 4
>
> phys:
> maxItems: 1
> @@ -58,6 +53,9 @@ properties:
> description: |
> phandle link and register offset to the system configuration registers.
>
> + power-domains:
> + maxItems: 1
> +
> ports:
> $ref: /schemas/graph.yaml#/properties/ports
>
> @@ -86,9 +84,50 @@ required:
> - clock-names
> - phys
> - phy-names
> - - mediatek,syscon-hdmi
> - ports
>
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: mediatek,mt8195-hdmi
> + then:
> + properties:
> + clocks:
> + items:
> + - description: APB
> + - description: HDCP
> + - description: HDCP 24M
> + - description: Split HDMI
> + clock-names:
> + items:
> + - const: hdmi_apb_sel
> + - const: hdcp_sel
> + - const: hdcp24_sel
> + - const: split_hdmi
> +
> + required:
> + - power-domains
> + else:
> + properties:
> + clocks:
> + items:
> + - description: Pixel Clock
> + - description: HDMI PLL
> + - description: Bit Clock
> + - description: S/PDIF Clock
> +
> + clock-names:
> + items:
> + - const: pixel
> + - const: pll
> + - const: bclk
> + - const: spdif
> +
> + required:
> + - mediatek,syscon-hdmi
> +
> additionalProperties: false
>
> examples:
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
> new file mode 100644
> index 000000000000..2dc273689584
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek HDMI DDC for mt8195
> +
> +maintainers:
> + - CK Hu <ck.hu@mediatek.com>
> + - Jitao shi <jitao.shi@mediatek.com>
> +
> +description: |
> + The HDMI DDC i2c controller is used to interface with the HDMI DDC pins.
> +
> +properties:
> + compatible:
> + enum:
> + - mediatek,mt8195-hdmi-ddc
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: ddc

Unless you expect it to grow, I propose to drop clock-names. It's not
useful when the name is the same as name of hardware.

Best regards,
Krzysztof