netdev - Re: [PATCH net-next RFC 0/3] riscv: dts: sophgo: Add ethernet support for cv18xx

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Message-ID: <dex2g5mafop6vtc5qdkdlunk5te53u7xxntcz6sjhwldhah6hl@gs6inqeuzlo2>
Date: Mon, 16 Jun 2025 08:55:47 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Alexander Sverdlin <alexander.sverdlin@...il.com>, 
	Inochi Amaoto <inochiama@...il.com>, Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Chen Wang <unicorn_wang@...look.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Richard Cochran <richardcochran@...il.com>, 
	Yixun Lan <dlan@...too.org>, Thomas Bonnefille <thomas.bonnefille@...tlin.com>, 
	Ze Huang <huangze@...t.edu.cn>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	sophgo@...ts.linux.dev, linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	Longbin Li <looong.bin@...il.com>
Subject: Re: [PATCH net-next RFC 0/3] riscv: dts: sophgo: Add ethernet
 support for cv18xx

On Sat, Jun 14, 2025 at 11:19:34PM +0200, Alexander Sverdlin wrote:
> Hi Inochi!
> 
> On Wed, 2025-06-11 at 16:07 +0800, Inochi Amaoto wrote:
> > Add device binding and dts for CV18XX series SoC, this dts change series
> > require both the mdio patch [1] and the reset patch [2].
> > 
> > [1] https://lore.kernel.org/all/20250611080228.1166090-1-inochiama@gmail.com
> > [2] https://lore.kernel.org/all/20250611075321.1160973-1-inochiama@gmail.com
> > 
> > Inochi Amaoto (3):
> >   dt-bindings: net: Add support for Sophgo CV1800 dwmac
> >   riscv: dts: sophgo: Add ethernet device for cv18xx
> >   riscv: dts: sophgo: Add mdio multiplexer device for cv18xx
> 
> Have you noticed any problems on the board you are testing on?
> I've added the patchset + pre-requisited + the following into my board DT
> for Milk-V Duo Module 01 EVB:
> 
> &mdio {
>        status = "okay";
> };
> 
> &gmac0 {
>        phy-mode = "internal";
>        phy-handle = <&internal_ephy>;
>        status = "okay";
> };
> 
> And the PHY is being detected and the Ethernet controller is being instantiated,
> but the PHY behaves really strange: LEDs blinking wildly, link status is bogus
> 100FULL UP even without cable insterted and the real traffic starts to travel
> only roughly a minute after the cable has been plugged in.
> 

This is true and may be related to a wrong pinctrl setting or the
phy setting. But I am not sure the right configuration is at now.
IIRC the phy is inited in the uboot and the kernel does not touch
its custom part.

Regards,
Inochi