netdev - Re: [RFC PATCH 10/10] net: stmmac: dwmac-loongson: Add GNET support

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Message-ID: <CACWXhKmPgiPXKJiBJjcAtWbY6Agb55XjqwDKdgiJuP5Se4r4Yw@mail.gmail.com>
Date: Fri, 14 Jul 2023 10:27:10 +0800
From: Feiyang Chen <chris.chenfeiyang@...il.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Feiyang Chen <chenfeiyang@...ngson.cn>, andrew@...n.ch, hkallweit1@...il.com, 
	peppe.cavallaro@...com, alexandre.torgue@...s.st.com, joabreu@...opsys.com, 
	chenhuacai@...ngson.cn, dongbiao@...ngson.cn, 
	loongson-kernel@...ts.loongnix.cn, netdev@...r.kernel.org, 
	loongarch@...ts.linux.dev
Subject: Re: [RFC PATCH 10/10] net: stmmac: dwmac-loongson: Add GNET support

On Thu, Jul 13, 2023 at 4:06 PM Russell King (Oracle)
<linux@...linux.org.uk> wrote:
>
> On Thu, Jul 13, 2023 at 10:49:38AM +0800, Feiyang Chen wrote:
> > Add GNET support. Use the fix_mac_speed() callback to workaround
> > issues with the Loongson PHY.
>
> It would be good to document what those issue(s) are, and if they are a
> PHY issue, why they need to be resolved in a MAC driver rather than
> using the PHY driver's link_change_notify().
>

Hi, Russell,

There is an issue with the synchronization between the network card
and the PHY. I believe that I am unable to access certain bits of the
network card's registers within the PHY driver.

Thanks,
Feiyang

> Thanks.
>
> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!