linux-kernel - Re: [PATCH v1 v1 3/7] riscv: dts: starfive: jh7110: add dc controller and hdmi node

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Message-ID: <fin3n5qq2jcejmksjrhi2s4xzfy3jvi264htwzvabzdrdc47wg@6binn7jn2pdv>
Date:   Tue, 1 Aug 2023 13:45:29 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     Keith Zhao <keith.zhao@...rfivetech.com>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        christian.koenig@....com, Bjorn Andersson <andersson@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Guo <shawnguo@...nel.org>, Jagan Teki <jagan@...eble.ai>,
        Chris Morgan <macromorgan@...mail.com>,
        Jack Zhu <jack.zhu@...rfivetech.com>,
        Shengyang Chen <shengyang.chen@...rfivetech.com>,
        Changhuang Liang <changhuang.liang@...rfivetech.com>
Subject: Re: [PATCH v1 v1 3/7] riscv: dts: starfive: jh7110: add dc
 controller and hdmi  node

On Tue, Aug 01, 2023 at 06:10:26PM +0800, Keith Zhao wrote:
> Add the dc controller and hdmi node for the Starfive JH7110 SoC.
> 
> Signed-off-by: Keith Zhao <keith.zhao@...rfivetech.com>
> ---
>  .../jh7110-starfive-visionfive-2.dtsi         | 87 +++++++++++++++++++
>  arch/riscv/boot/dts/starfive/jh7110.dtsi      | 43 +++++++++
>  2 files changed, 130 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> index de0f40a8b..32e5cc96c 100644
> --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> @@ -31,6 +31,21 @@ memory@...00000 {
>  		reg = <0x0 0x40000000 0x1 0x0>;
>  	};
>  
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		linux,cma {
> +			compatible = "shared-dma-pool";
> +			reusable;
> +			size = <0x0 0x20000000>;
> +			alignment = <0x0 0x1000>;
> +			alloc-ranges = <0x0 0x80000000 0x0 0x20000000>;
> +			linux,cma-default;
> +		};
> +	};
> +

You should explain why you need this, either in a comment or in the
commit log.
>

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