linux-kernel - Re: [PATCH v3 2/2] arm64: dts: imx8mp: add reserve-memory nodes for DSP

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Date:   Wed, 11 Oct 2023 07:37:10 +0200
From:   Alexander Stein <alexander.stein@...tq-group.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        Shawn Guo <shawnguo@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        "S.J. Wang" <shengjiu.wang@....com>,
        Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
        Daniel Baluta <daniel.baluta@....com>,
        Mpuaudiosw <Mpuaudiosw@....com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-imx <linux-imx@....com>, linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        LnxRevLi <LnxRevLi@....com>,
        "Iuliana Prodan (OSS)" <iuliana.prodan@....nxp.com>
Subject: Re: [PATCH v3 2/2] arm64: dts: imx8mp: add reserve-memory nodes for DSP

Hi Iuliana,

Am Dienstag, 10. Oktober 2023, 11:09:29 CEST schrieb Iuliana Prodan (OSS):
> From: Iuliana Prodan <iuliana.prodan@....com>
> 
> Add the reserve-memory nodes used by DSP when the rpmsg
> feature is enabled.
> 
> Signed-off-by: Iuliana Prodan <iuliana.prodan@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> b/arch/arm64/boot/dts/freescale/imx8mp.dtsi index
> cc406bb338fe..22815b3ea890 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -211,6 +211,22 @@
>  			reg = <0 0x92400000 0 0x2000000>;
>  			no-map;
>  		};
> +
> +		dsp_vdev0vring0: vdev0vring0@...f0000 {
> +			reg = <0 0x942f0000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		dsp_vdev0vring1: vdev0vring1@...f8000 {
> +			reg = <0 0x942f8000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		dsp_vdev0buffer: vdev0buffer@...00000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x94300000 0 0x100000>;
> +			no-map;
> +		};

Please configure these reserved memories on board level. Not every i.MX8MP 
based board uses this DSP or has these memory addresses available.

Best regards,
Alexander

>  	};
> 
>  	pmu {


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