linux-kernel - Re: [PATCH v2 4/8] dt-bindings: phy: convert HDMI PHY binding to YAML schema

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Message-ID: <1602650671.27998.2.camel@mtksdaap41>
Date:   Wed, 14 Oct 2020 12:44:31 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "David Airlie" <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        "Kishon Vijay Abraham I" <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Min Guo <min.guo@...iatek.com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v2 4/8] dt-bindings: phy: convert HDMI PHY binding to
 YAML schema

Hi, Chunfeng:

On Tue, 2020-10-13 at 16:52 +0800, Chunfeng Yun wrote:
> Convert HDMI PHY binding to YAML schema mediatek,ufs-phy.yaml
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
> v2: fix binding check warning of reg in example
> ---
>  .../display/mediatek/mediatek,hdmi.txt        | 17 +---
>  .../bindings/phy/mediatek,hdmi-phy.yaml       | 90 +++++++++++++++++++
>  2 files changed, 91 insertions(+), 16 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.txt
> index 7b124242b0c5..edac18951a75 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.txt
> @@ -50,22 +50,7 @@ Required properties:
>  
>  HDMI PHY
>  ========
> -
> -The HDMI PHY serializes the HDMI encoder's three channel 10-bit parallel
> -output and drives the HDMI pads.
> -
> -Required properties:
> -- compatible: "mediatek,<chip>-hdmi-phy"
> -- reg: Physical base address and length of the module's registers
> -- clocks: PLL reference clock
> -- clock-names: must contain "pll_ref"
> -- clock-output-names: must be "hdmitx_dig_cts" on mt8173
> -- #phy-cells: must be <0>
> -- #clock-cells: must be <0>
> -
> -Optional properties:
> -- mediatek,ibias: TX DRV bias current for <1.65Gbps, defaults to 0xa
> -- mediatek,ibias_up: TX DRV bias current for >1.65Gbps, defaults to 0x1c
> +See phy/mediatek,hdmi-phy.yaml
>  
>  Example:
>  
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml b/Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml
> new file mode 100644
> index 000000000000..77df50204606
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml
> @@ -0,0 +1,90 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 MediaTek
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/mediatek,hdmi-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek High Definition Multimedia Interface (HDMI) PHY binding
> +
> +maintainers:
> +  - CK Hu <ck.hu@...iatek.com>

I think you should remove "CK Hu <ck.hu@...iatek.com>" and add latest
mediatek drm maintainer:

DRM DRIVERS FOR MEDIATEK
M:	Chun-Kuang Hu <chunkuang.hu@...nel.org>
M:	Philipp Zabel <p.zabel@...gutronix.de>
L:	dri-devel@...ts.freedesktop.org
S:	Supported
F:	Documentation/devicetree/bindings/display/mediatek/
F:	drivers/gpu/drm/mediatek/

Regards,
CK

> +  - Chunfeng Yun <chunfeng.yun@...iatek.com>
> +
> +description: |
> +  The HDMI PHY serializes the HDMI encoder's three channel 10-bit parallel
> +  output and drives the HDMI pads.
> +
> +properties:
> +  $nodename:
> +    pattern: "^hdmi-phy@[0-9a-f]+$"
> +
> +  compatible:
> +    enum:
> +      - mediatek,mt2701-hdmi-phy
> +      - mediatek,mt8173-hdmi-phy
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PLL reference clock
> +
> +  clock-names:
> +    items:
> +      - const: pll_ref
> +
> +  clock-output-names:
> +    items:
> +      - const: hdmitx_dig_cts
> +
> +  "#phy-cells":
> +    const: 0
> +
> +  "#clock-cells":
> +    const: 0
> +
> +  mediatek,ibias:
> +    description:
> +      TX DRV bias current for < 1.65Gbps
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    minimum: 0
> +    maximum: 63
> +    default: 0xa
> +
> +  mediatek,ibias_up:
> +    description:
> +      TX DRV bias current for >= 1.65Gbps
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    minimum: 0
> +    maximum: 63
> +    default: 0x1c
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - clock-output-names
> +  - "#phy-cells"
> +  - "#clock-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8173-clk.h>
> +    hdmi_phy: hdmi-phy@...09100 {
> +        compatible = "mediatek,mt8173-hdmi-phy";
> +        reg = <0x10209100 0x24>;
> +        clocks = <&apmixedsys CLK_APMIXED_HDMI_REF>;
> +        clock-names = "pll_ref";
> +        clock-output-names = "hdmitx_dig_cts";
> +        mediatek,ibias = <0xa>;
> +        mediatek,ibias_up = <0x1c>;
> +        #clock-cells = <0>;
> +        #phy-cells = <0>;
> +    };
> +
> +...