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From: Ard Biesheuvel <ardb@kernel.org>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>,
	"open list:BPF JIT for MIPS (32-BIT AND 64-BIT)" 
	<netdev@vger.kernel.org>, Willy Liu <willy.liu@realtek.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Sasha Levin <sashal@kernel.org>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Masahisa Kojima <masahisa.kojima@linaro.org>
Subject: Re: realtek PHY commit bbc4d71d63549 causes regression
Date: Sat, 17 Oct 2020 20:17:09 +0200
Message-ID: <CAMj1kXF5BGgER0eQjGUmyjX2jh=jmmLsJMo6W19o0EhFLr-k7Q@mail.gmail.com> (raw)
In-Reply-To: <CAMj1kXEcrULejk+h1Jv42W=r7odQ9Z_G0XDX_KrEnYYPEVgHkA@mail.gmail.com>

On Sat, 17 Oct 2020 at 20:11, Ard Biesheuvel <ardb@kernel.org> wrote:
>
> On Sat, 17 Oct 2020 at 20:04, Andrew Lunn <andrew@lunn.ch> wrote:
> >
> > > I have tried this, and it seems to fix the issue. I will send out a
> > > patch against the netsec driver.
> >
> > Please also fix the firmware so it does not pass rgmii.
> >
> > If there are pure DT systems, which do require phy-mode to be used, we
> > will need to revert your proposed change in order to make the MAC
> > driver work as it should, rather than work around the broken firmware.
> >
>
> What do you mean by 'pure' DT system? Only EDK2 based firmware exists
> for this platform, and it can be configured to boot either in DT or in
> ACPI mode. In both cases, it will pass the same, incorrect PHY mode,
> and in both cases, the firmware will already have configured the PHY
> correctly.
>
> So what I propose to do is drop the handling of the [mandatory]
> phy-mode device property from the netsec driver (which is really only
> used by this board). As we don't really need a phy-mode to begin with,
> and given that firmware exists in the field that passes the wrong
> value, the only option I see for passing a value here is to use a
> different, *optional* DT property (force-phy-mode or
> phy-mode-override) that takes the place of phy-mode. For ACPI boot,
> you will just need to fix your firmware if you are using a different
> PHY configuration.

... or add a property that makes 'phy-mode' take effect, and default
to ignoring it.

  reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-17 14:20 Ard Biesheuvel
2020-10-17 14:44 ` Andrew Lunn
2020-10-17 14:46   ` Ard Biesheuvel
2020-10-17 15:11     ` Andrew Lunn
2020-10-17 15:18       ` Ard Biesheuvel
2020-10-17 16:14         ` Ilias Apalodimas
2020-10-17 16:17           ` Ard Biesheuvel
2020-10-17 16:21             ` Ilias Apalodimas
2020-10-17 18:04             ` Andrew Lunn
2020-10-17 18:11               ` Ard Biesheuvel
2020-10-17 18:17                 ` Ard Biesheuvel [this message]
2020-10-17 18:27                 ` Andrew Lunn
2020-10-17 18:55                   ` Ard Biesheuvel
2020-10-17 19:49                     ` Andrew Lunn
2020-10-17 22:19                       ` Ard Biesheuvel
2020-10-17 23:02                         ` Andrew Lunn
2020-10-18 10:35                           ` Ard Biesheuvel
2020-10-18 10:56                             ` Ard Biesheuvel
2020-10-18 15:45                               ` Andrew Lunn
2020-10-25 14:16                                 ` Ard Biesheuvel
2020-10-25 14:28                                   ` Andrew Lunn
2020-10-25 14:34                                     ` Ard Biesheuvel
2020-10-25 14:42                                       ` Andrew Lunn
2020-10-29 14:21                                         ` Ilias Apalodimas
2020-10-29 14:39                                           ` Andrew Lunn
2020-10-29 14:42                                             ` Ard Biesheuvel
2020-10-29 14:50                                               ` Andrew Lunn
2020-10-29 14:46                                             ` Ilias Apalodimas
2020-11-05 17:31                                               ` Jernej Škrabec
2020-11-13 13:50                                                 ` Arnd Bergmann
2020-11-13 14:44                                                   ` Andrew Lunn
2020-11-13 15:33                                                     ` Arnd Bergmann
2020-11-13 16:56                                                       ` Andrew Lunn
2020-11-13 21:26                                                         ` Arnd Bergmann
2020-11-13 22:43                                                           ` Andrew Lunn
2020-11-13 22:49                                                             ` Ard Biesheuvel
2020-11-14  0:40                                                               ` Andrew Lunn
2020-11-14 10:09                                                                 ` Ard Biesheuvel
2020-10-18 15:38                             ` Andrew Lunn
2020-10-18 14:20                         ` Masami Hiramatsu
2020-10-17 18:01           ` Andrew Lunn

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