Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <07ecf7cf-4a68-0f80-0452-3737b7d7922d@linaro.org>
Date:   Fri, 13 Jan 2023 09:25:58 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.6.1
Subject: Re: [PATCH 01/10] dt-bindings: media: mediatek,vcodec: Remove
 dma-ranges property
Content-Language: en-US
To:     Yong Wu <yong.wu@mediatek.com>, Joerg Roedel <joro@8bytes.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Rob Herring <robh+dt@kernel.org>
Cc:     Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Hans Verkuil <hverkuil@xs4all.nl>, nfraprado@collabora.com,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        iommu@lists.linux.dev,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        mingyuan.ma@mediatek.com, yf.wang@mediatek.com,
        libo.kang@mediatek.com, Yunfei Dong <yunfei.dong@mediatek.com>,
        kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>,
        chengci.xu@mediatek.com, youlin.pei@mediatek.com,
        anan.sun@mediatek.com, Tiffany Lin <tiffany.lin@mediatek.com>,
        Andrew-CT Chen <andrew-ct.chen@mediatek.com>
References: <20230113060133.9394-1-yong.wu@mediatek.com>
 <20230113060133.9394-2-yong.wu@mediatek.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230113060133.9394-2-yong.wu@mediatek.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 13/01/2023 07:01, Yong Wu wrote:
> MediaTek iommu has already controlled the masters' iova ranges by the
> master's larb/port id. then the dma-ranges property is unnecessary for

Sentences in English always start with a capital letter, however also
they do not start with "Then". Make it a proper a proper sentence.

> the master's node. the master is vcodec here.

Unnecessary or invalid? Don't you depend now on some feature of driver
added for example recently?

> 
> Cc: Tiffany Lin <tiffany.lin@mediatek.com>
> Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
> Cc: Yunfei Dong <yunfei.dong@mediatek.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>

There is little point in storing output of get_maintainers.pl forever in
the git log. If you need it for some reason, please keep it after ---.

> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
>  .../devicetree/bindings/media/mediatek,vcodec-decoder.yaml | 5 -----
>  .../devicetree/bindings/media/mediatek,vcodec-encoder.yaml | 5 -----
>  .../bindings/media/mediatek,vcodec-subdev-decoder.yaml     | 7 -------
>  3 files changed, 17 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
> index aa55ca65d6ed..fad59b486d5d 100644
> --- a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
> +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
> @@ -56,11 +56,6 @@ properties:
>        List of the hardware port in respective IOMMU block for current Socs.
>        Refer to bindings/iommu/mediatek,iommu.yaml.
>  
> -  dma-ranges:
> -    maxItems: 1
> -    description: |
> -      Describes the physical address space of IOMMU maps to memory.
> -
>    mediatek,vpu:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description:
> diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
> index 0f2ea8d9a10c..a2051b31fa29 100644
> --- a/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
> +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-encoder.yaml
> @@ -49,11 +49,6 @@ properties:
>        List of the hardware port in respective IOMMU block for current Socs.
>        Refer to bindings/iommu/mediatek,iommu.yaml.
>  
> -  dma-ranges:
> -    maxItems: 1
> -    description: |
> -      Describes the physical address space of IOMMU maps to memory.
> -
>    mediatek,vpu:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description:
> diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
> index c4f20acdc1f8..290594bc91cc 100644
> --- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
> +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
> @@ -76,11 +76,6 @@ properties:
>        The node of system control processor (SCP), using
>        the remoteproc & rpmsg framework.
>  
> -  dma-ranges:
> -    maxItems: 1
> -    description: |
> -      Describes the physical address space of IOMMU maps to memory.
> -
>    "#address-cells":
>      const: 2
>  
> @@ -203,7 +198,6 @@ required:
>    - reg
>    - iommus
>    - mediatek,scp
> -  - dma-ranges
>    - ranges
>  
>  if:
> @@ -236,7 +230,6 @@ examples:
>              compatible = "mediatek,mt8192-vcodec-dec";
>              mediatek,scp = <&scp>;
>              iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
> -            dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
>              #address-cells = <2>;
>              #size-cells = <2>;
>              ranges = <0 0 0 0x16000000 0 0x40000>;

Best regards,
Krzysztof