linux-kernel - Re: [PATCH v7 3/5] dt-binding: mt8183: Add Mediatek MDP3 dt-bindings

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Date:   Tue, 7 Sep 2021 08:11:12 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Moudy Ho <moudy.ho@...iatek.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Rob Landley <rob@...dley.net>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Pi-Hsun Shih <pihsun@...omium.org>, menghui.lin@...iatek.com,
        Sj Huang (黃信璋) <sj.huang@...iatek.com>,
        ben.lok@...iatek.com, randy.wu@...iatek.com,
        srv_heupstream <srv_heupstream@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...gle.com>
Subject: Re: [PATCH v7 3/5] dt-binding: mt8183: Add Mediatek MDP3 dt-bindings

Hi, Moudy:

Moudy Ho <moudy.ho@...iatek.com> 於 2021年8月24日 週二 下午6:02寫道：
>
> This patch adds DT binding document for Media Data Path 3 (MDP3)
> a unit in multimedia system used for scaling and color format convert.
>
> Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
> ---
>  .../bindings/media/mediatek,mdp3-ccorr.yaml   |  57 +++++
>  .../bindings/media/mediatek,mdp3-rdma.yaml    | 207 ++++++++++++++++++
>  .../bindings/media/mediatek,mdp3-rsz.yaml     |  65 ++++++
>  .../bindings/media/mediatek,mdp3-wdma.yaml    |  71 ++++++
>  .../bindings/media/mediatek,mdp3-wrot.yaml    |  71 ++++++
>  5 files changed, 471 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mdp3-ccorr.yaml

I've compared ccorr driver in display [1] and ccorr in mdp [2], both
are similar. So I would like both binding document are placed
together. In display folder? In mdp folder? In SoC folder? I've no
idea which one is better. At lease put together.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c?h=v5.14
[2] https://patchwork.kernel.org/project/linux-mediatek/patch/20210824100027.25989-6-moudy.ho@mediatek.com/

Regards,
Chun-Kuang.

>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mdp3-rdma.yaml
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mdp3-rsz.yaml
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mdp3-wdma.yaml
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mdp3-wrot.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/mediatek,mdp3-ccorr.yaml b/Documentation/devicetree/bindings/media/mediatek,mdp3-ccorr.yaml
> new file mode 100644
> index 000000000000..59fd68b46022
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/mediatek,mdp3-ccorr.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/mediatek,mdp3-ccorr.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek Media Data Path 3 CCORR Device Tree Bindings
> +
> +maintainers:
> +  - Daoyuan Huang <daoyuan.huang@...iatek.com>
> +  - Moudy Ho <moudy.ho@...iatek.com>
> +
> +description: |
> +  One of Media Data Path 3 (MDP3) components used to do color correction with 3X3 matrix.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +        - mediatek,mt8183-mdp3-ccorr
> +
> +  mediatek,mdp3-id:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    maxItems: 1
> +    description: |
> +      HW index to distinguish same functionality modules.
> +
> +  reg:
> +    description: |
> +      Physical base address and length of the function block
> +      register space, the number aligns with the component
> +      and its own subcomponent.
> +
> +  mediatek,gce-client-reg:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: |
> +      sub-system id corresponding to the global command engine (GCE)
> +      register address.
> +      $ref: /schemas/mailbox/mtk-gce.txt
> +
> +  clocks:
> +    minItems: 1
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8183-clk.h>
> +    #include <dt-bindings/gce/mt8183-gce.h>
> +
> +    mdp3_ccorr: mdp3_ccorr@...1c000 {
> +      compatible = "mediatek,mt8183-mdp3-ccorr";
> +      mediatek,mdp3-id = <0>;
> +      reg = <0x1401c000 0x1000>;
> +      mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0xc000 0x1000>;
> +      clocks = <&mmsys CLK_MM_MDP_CCORR>;
> +    };