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Message-ID: <3d9eb660-e255-4477-a04b-6db8d249a20d@sifive.com>
Date:   Thu, 28 Sep 2023 19:30:46 -0500
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User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH 4/5] riscv: dts: renesas: rzfive-smarc: Drop dma
 properties from SSI1 node
Content-Language: en-US
To:     Prabhakar <prabhakar.csengg@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Magnus Damm <magnus.damm@gmail.com>,
        Conor Dooley <conor+dt@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        Biju Das <biju.das.jz@bp.renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
References: <20230929000704.53217-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
 <20230929000704.53217-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
From:   Samuel Holland <samuel.holland@sifive.com>
In-Reply-To: <20230929000704.53217-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
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Hi Prabhakar,

On 2023-09-28 7:07 PM, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> With DMA enabled audio capture/playback has some echo noise. So for
> now switch to PIO mode until fixed.

Is it really appropriate to work around a Linux software bug with a DT change
like this? Remember, the devicetrees are used by software other than Linux.

Regards,
Samuel

> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi b/arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi
> index a8573fdfd8b1..85f96e24a96e 100644
> --- a/arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi
> +++ b/arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi
> @@ -6,3 +6,8 @@
>   */
>  
>  #include <arm64/renesas/rzg2ul-smarc.dtsi>
> +
> +&ssi1 {
> +	/delete-property/ dmas;
> +	/delete-property/ dma-names;
> +};