linux-kernel - Re: [PATCH v2 1/2] arm64: dts: tqma8mpql-mba8mpxl: Configure multiple queues on eqos

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Message-ID: <aYoJL_uY1JiCWpQh@lizhi-Precision-Tower-5810>
Date: Mon, 9 Feb 2026 11:19:59 -0500
From: Frank Li <Frank.li@....com>
To: Alexander Stein <alexander.stein@...tq-group.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux@...tq-group.com,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] arm64: dts: tqma8mpql-mba8mpxl: Configure
 multiple queues on eqos

On Mon, Feb 09, 2026 at 03:35:52PM +0100, Alexander Stein wrote:
> The MBa8MPxL mainboard has an integrated PHY connected to the EQOS
> ethernet controller which can support up to five queues. Configure
> these queues in the same manor as done on the imx8mp-evk.

Nit: Add empty line between paragraph.

Reviewed-by: Frank Li <Frank.Li@....com>

> Setting DMA to threas mode is necessary to prevent FIFO overflows, see
> commit 0bc3e333a0c82 ("arm64: dts: imx8mp-evk: configure multiple queues
> on eqos")
>
> Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
> ---
> Changes in v2:
> * Rebased to correct branch
>
>  .../freescale/imx8mp-tqma8mpql-mba8mpxl.dts   | 67 +++++++++++++++++++
>  1 file changed, 67 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mpxl.dts b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mpxl.dts
> index ad49bf85a04d3..890d1e525a489 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mpxl.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mpxl.dts
> @@ -336,6 +336,9 @@ &eqos {
>  	pinctrl-0 = <&pinctrl_eqos>, <&pinctrl_eqos_phy>;
>  	phy-mode = "rgmii-id";
>  	phy-handle = <&ethphy3>;
> +	snps,force_thresh_dma_mode;
> +	snps,mtl-tx-config = <&mtl_tx_setup>;
> +	snps,mtl-rx-config = <&mtl_rx_setup>;
>  	status = "okay";
>
>  	mdio {
> @@ -359,6 +362,70 @@ ethphy3: ethernet-phy@3 {
>  			interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
>  		};
>  	};
> +
> +	mtl_tx_setup: tx-queues-config {
> +		snps,tx-queues-to-use = <5>;
> +
> +		queue0 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x1>;
> +		};
> +
> +		queue1 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x2>;
> +		};
> +
> +		queue2 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x4>;
> +		};
> +
> +		queue3 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x8>;
> +		};
> +
> +		queue4 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0xf0>;
> +		};
> +	};
> +
> +	mtl_rx_setup: rx-queues-config {
> +		snps,rx-queues-to-use = <5>;
> +		snps,rx-sched-sp;
> +
> +		queue0 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x1>;
> +			snps,map-to-dma-channel = <0>;
> +		};
> +
> +		queue1 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x2>;
> +			snps,map-to-dma-channel = <1>;
> +		};
> +
> +		queue2 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x4>;
> +			snps,map-to-dma-channel = <2>;
> +		};
> +
> +		queue3 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0x8>;
> +			snps,map-to-dma-channel = <3>;
> +		};
> +
> +		queue4 {
> +			snps,dcb-algorithm;
> +			snps,priority = <0xf0>;
> +			snps,map-to-dma-channel = <4>;
> +		};
> +	};
>  };
>
>  &fec {
> --
> 2.43.0
>