On Thu, Oct 23, 2025 at 04:48:53PM +0200, Emanuele Ghidoli wrote:
From: Emanuele Ghidoli emanuele.ghidoli@toradex.com
While the DP83867 PHYs report EEE capability through their feature registers, the actual hardware does not support EEE (see Links). When the connected MAC enables EEE, it causes link instability and communication failures.
The issue is reproducible with a iMX8MP and relevant stmmac ethernet port. Since the introduction of phylink-managed EEE support in the stmmac driver, EEE is now enabled by default, leading to issues on systems using the DP83867 PHY.
Call phy_disable_eee during phy initialization to prevent EEE from being enabled on DP83867 PHYs.
Link: https://e2e.ti.com/support/interface-group/interface/f/interface-forum/14452... Link: https://e2e.ti.com/support/interface-group/interface/f/interface-forum/65863...
Interesting statement this last one. "None of our gigabit PHYs support EEE operation today."
I wounder if any of the other TI PHY drivers need this fix?
Fixes: 2a10154abcb7 ("net: phy: dp83867: Add TI dp83867 phy") Cc: stable@vger.kernel.org Signed-off-by: Emanuele Ghidoli emanuele.ghidoli@toradex.com
Reviewed-by: Andrew Lunn andrew@lunn.ch
Andrew