netdev - Re: [PATCH] net: mvpp2: add delay at the end of .mac

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Date:   Sun, 1 May 2022 12:30:07 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Baruch Siach <baruch@...s.co.il>
Cc:     Marcin Wojtas <mw@...ihalf.com>, netdev@...r.kernel.org,
        Baruch Siach <baruch.siach@...lu.com>
Subject: Re: [PATCH] net: mvpp2: add delay at the end of .mac_prepare

On Wed, Apr 27, 2022 at 06:05:36PM +0300, Baruch Siach wrote:
> From: Baruch Siach <baruch.siach@...lu.com>
> 
> Without this delay PHY mode switch from XLG to SGMII fails in a weird
> way. Rx side works. However, Tx appears to work as far as the MAC is
> concerned, but packets don't show up on the wire.
> 
> Tested with Marvell 10G 88X3310 PHY.

Which firmware do you have running on the 88x3310 PHY? Early versions
are buggy when switching between modes.

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