linux-kernel - [PATCH net-next v1 0/3] dp83tg720: Reduce link recovery

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Message-Id: <20250610081059.3842459-1-o.rempel@pengutronix.de>
Date: Tue, 10 Jun 2025 10:10:56 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH net-next v1 0/3] dp83tg720: Reduce link recovery

This patch series improves the link recovery behavior of the TI
DP83TG720 PHY driver.

Previously, we introduced randomized reset delay logic to avoid reset
collisions in multi-PHY setups. While this approach was functional, it
had notable drawbacks: unpredictable behavior, longer and more variable
link recovery times, and overall higher complexity in link handling.

With this new approach, we replace the randomized delay with
deterministic, role-specific delays in the PHY reset logic. This enables
us to:
- Remove the redundant empirical 600 ms delay in read_status()
- Drop the random polling interval logic
- Introduce a clean, adaptive polling strategy with consistent
behavior and improved responsiveness

As a result, the PHY is now able to recover link reliably in under
1000 ms

David Jander (3):
  net: phy: dp83tg720: implement soft reset with asymmetric delay
  net: phy: dp83tg720: remove redundant 600ms post-reset delay
  net: phy: dp83tg720: switch to adaptive polling and remove random
    delays

 drivers/net/phy/dp83tg720.c | 179 ++++++++++++++++++++++++------------
 1 file changed, 120 insertions(+), 59 deletions(-)

--
2.39.5