netdev - Re: [PATCH 3/3] arm64: dts: rockchip: Add RTL8367RB-VB switch to Radxa E24C

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Message-Id: <20250729115009.2158019-1-amadeus@jmu.edu.cn>
Date: Tue, 29 Jul 2025 19:50:09 +0800
From: Chukun Pan <amadeus@....edu.cn>
To: jonas@...boo.se
Cc: alsi@...g-olufsen.dk,
	amadeus@....edu.cn,
	andrew@...n.ch,
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Subject: Re: [PATCH 3/3] arm64: dts: rockchip: Add RTL8367RB-VB switch to Radxa E24C

Hi,

> The issue is with TSO and RX checksum offload, with those disabled on
> the conduit interface (gmac1/eth0) my issues disappeared.

I did a test today and the same problem occurred when running the new
kernel on my rk3568 + rtl8367s board. This problem does not exist on
older kernels (6.1 and 6.6). Not sure where the problem is.

> With a 'mdio' child node 'make CHECK_DTBS=y' report something like:
>
>    rockchip/rk3528-radxa-e24c.dtb: ethernet-switch@1d (realtek,rtl8365mb): mdio: False schema does not allow { [snip] }
>          from schema $id: http://devicetree.org/schemas/net/dsa/realtek.yaml#
>
> With a mdio node the driver is happy and dtschema is sad, and without
> the mdio node it was the other way around.

On older kernels (6.1/6.6) only realtek-smi requires mdio child OF node.
Commit bba140a566ed ("net: dsa: realtek: use the same mii bus driver for both interfaces")
changed this behavior, both MDIO interface and SMI interface need it
(rtl83xx_setup_user_mdio), but the dt-bindings has not been updated.
I think this needs a Fixes tag.

Thanks,
Chukun

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