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Subject: Re: Broken imx6 to QCA8334 connection since PHYLIB to PHYLINK
 conversion
To:     Andrew Lunn <andrew@lunn.ch>
Cc:     Jonathan McDowell <noodles@earth.li>,
        Florian Fainelli <f.fainelli@gmail.com>,
        David Miller <davem@davemloft.net>, netdev@vger.kernel.org
References: <b7f5842a-c7b7-6439-ae68-51e1690d2507@ysoft.com>
 <YHRVv/GwCmnRN14j@lunn.ch> <9fa83984-f385-4705-a50f-688928cc366f@ysoft.com>
 <YHWSNaoNELqI3e4r@lunn.ch>
From:   =?UTF-8?B?TWljaGFsIFZva8OhxI0=?= <michal.vokac@ysoft.com>
Message-ID: <a1927419-1392-7599-c74d-5305b536e018@ysoft.com>
Date:   Tue, 13 Apr 2021 15:26:30 +0200
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On 13. 04. 21 14:44, Andrew Lunn wrote:
> On Tue, Apr 13, 2021 at 09:09:37AM +0200, Michal Vokáč wrote:
>> On 12. 04. 21 16:14, Andrew Lunn wrote:
>> The FEC does not have PHY and is connected to the switch at RGMII level.
>> Adding the fixed-link { speed = <1000>; full-duplex; }; subnode to FEC
>> does not help.
> 
> If the FEC does not have a PHY, it should not have a
> phy-handle. Instead, you need a fixed-link.
> 
> What is currently happening is that both the switch and the FEC are
> trying to connect to the same PHY. Probably the switch does its
> connection first and succeeds. When the FEC tries to connect, the PHY
> is in use, so an error is returned.
> 
> By providing a fixed-link, instead of a phy-handle, a simulated PHY is
> generated, which the FEC can connect to.

That was it, thanks a lot Andrew! I will send a patch ASAP.

Michal