linux-kernel - Re: [net-next PATCH] net: stmmac: dwmac-ipq806x: account for rgmii-txid/rxid/id phy-mode

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Date: Tue, 7 May 2024 03:20:49 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH] net: stmmac: dwmac-ipq806x: account for
 rgmii-txid/rxid/id phy-mode

On Mon, May 06, 2024 at 02:32:46PM +0200, Christian Marangi wrote:
> Currently the ipq806x dwmac driver is almost always used attached to the
> CPU port of a switch and phy-mode was always set to "rgmii" or "sgmii".
> 
> Some device came up with a special configuration where the PHY is
> directly attached to the GMAC port and in those case phy-mode needs to
> be set to "rgmii-id" to make the PHY correctly work and receive packets.
> 
> Since the driver supports only "rgmii" and "sgmii" mode, when "rgmii-id"
> (or variants) mode is set, the mode is rejected and probe fails.
> 
> Add support also for these phy-modes to correctly setup PHYs that requires
> delay applied to tx/rx.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew