From nobody Sat Feb 7 23:23:05 2026 Received: from secondary.pambor.com (secondary.pambor.com [46.38.233.203]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0983A1B592; Sun, 4 Feb 2024 10:11:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.38.233.203 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707041512; cv=none; b=CgcRwZpZgpgLpHNoP5Iz9xG3O+rDrxaBU8l0YOBcmxX2IwMwn7PNBWL49X4cje6hpGRUYEXzi9Yjw+zkqsRxV6LvZ8r7CnLQL1scd9yVV/vKrBO1bLubgHGyZI6HJdsTETK77m1HcuO7TBFL6RKsWSN0M68c3UsHTQZMXwwau9A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707041512; c=relaxed/simple; bh=GP/K0NDMKaVN58IzCg9WjhrcSkEgoqe/cArG54xldsk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=S+5eIJFhkxkaLWiUXaCXeYcQE7H66JdsDAwRdL930taVDcjyKbkaN0bvbqpgv9ZNFy7PwLAGZMUetDXDDHtkDkc7IZDauLPfDu8vKmQquHBAKoC/gTyEmD7Lelg8gLoSZLDaOsbS2h82phwNcRcCRYcHrqqLDVZj7YzhFkqeLXg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=osasysteme.de; spf=pass smtp.mailfrom=osasysteme.de; dkim=pass (2048-bit key) header.d=osasysteme.de header.i=@osasysteme.de header.b=Eef8+IUx; arc=none smtp.client-ip=46.38.233.203 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=osasysteme.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=osasysteme.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=osasysteme.de header.i=@osasysteme.de header.b="Eef8+IUx" Received: from localhost (localhost [127.0.0.1]) by secondary.pambor.com (Postfix) with ESMTP id 2C0396EFF59; Sun, 4 Feb 2024 11:12:11 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=osasysteme.de; s=19022017; t=1707041531; bh=GP/K0NDMKaVN58IzCg9WjhrcSkEgoqe/cArG54xldsk=; h=From:To:Cc:Subject:Date:From; b=Eef8+IUxJ317AplhtmwG/8ulU4OYW5UtcgCdAZRUys/MAFhmzSUnnpkE6WT/hkity JmTe4QuvnGsjD7XQeCqPGTBJ7hCUi8OiGPb/YBDiLpPyrfFW8/m7sieKVfQ9J2oh5N Jy/aT1xI1F6f5RNPSHt2ybNDLSe+/XzR7csD+WfBfiZc+O36JCNmYuLf1kM24//0iU 9ZZYPmbzeJBC++kFvX0VdDwTnKAeTeKfvLeXoUdGLROM5tZsNNW6mTMlrpQexaxNX/ X/ODuYjMhnobCluYSkYrEOzMzrvVhTs2emsmZ4yReJPxAHZzSIB0Unfg+MqOBa+LGE q08tsqs73cV8w== X-Virus-Scanned: Debian amavisd-new at secondary.pambor.com Received: from secondary.pambor.com ([127.0.0.1]) by localhost (secondary.pambor.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id I7Kpfd2cu_BG; Sun, 4 Feb 2024 11:12:08 +0100 (CET) Received: from chromebook.fritz.box (dynamic-2a01-0c22-d419-0100-dbc6-7578-807d-f886.c22.pool.telefonica.de [IPv6:2a01:c22:d419:100:dbc6:7578:807d:f886]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.osasysteme.de (Postfix) with ESMTPSA id 3BD166EFE8E; Sun, 4 Feb 2024 11:12:07 +0100 (CET) From: Tim Pambor To: Andrew Lunn Cc: Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Dan Murphy , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Tim Pambor Subject: [PATCH v2] net: phy: dp83822: Fix RGMII TX delay configuration Date: Sun, 4 Feb 2024 11:11:28 +0100 Message-ID: <20240204101128.49336-1-tp@osasysteme.de> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The logic for enabling the TX clock shift is inverse of enabling the RX clock shift. The TX clock shift is disabled when DP83822_TX_CLK_SHIFT is set. Correct the current behavior and always write the delay configuration to ensure consistent delay settings regardless of bootloader configuration. Reference: https://www.ti.com/lit/ds/symlink/dp83822i.pdf p. 69 Fixes: 8095295292b5 ("net: phy: DP83822: Add setting the fixed internal del= ay") Signed-off-by: Tim Pambor --- Changes in v2: - Further cleanup of RGMII configuration - Check for errors setting DP83822_RGMII_MODE_EN --- drivers/net/phy/dp83822.c | 41 +++++++++++++-------------------------- 1 file changed, 14 insertions(+), 27 deletions(-) diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c index b7cb71817780..1b2c34a97396 100644 --- a/drivers/net/phy/dp83822.c +++ b/drivers/net/phy/dp83822.c @@ -380,42 +380,29 @@ static int dp83822_config_init(struct phy_device *phy= dev) { struct dp83822_private *dp83822 =3D phydev->priv; struct device *dev =3D &phydev->mdio.dev; - int rgmii_delay; - s32 rx_int_delay; - s32 tx_int_delay; + int rcsr_mask =3D DP83822_RGMII_MODE_EN; + int rcsr =3D 0; int err =3D 0; int bmcr; =20 if (phy_interface_is_rgmii(phydev)) { - rx_int_delay =3D phy_get_internal_delay(phydev, dev, NULL, 0, - true); + rcsr |=3D DP83822_RGMII_MODE_EN; =20 - if (rx_int_delay <=3D 0) - rgmii_delay =3D 0; - else - rgmii_delay =3D DP83822_RX_CLK_SHIFT; + /* Set DP83822_RX_CLK_SHIFT to enable rx clk internal delay */ + if (phy_get_internal_delay(phydev, dev, NULL, 0, true) > 0) + rcsr |=3D DP83822_RX_CLK_SHIFT; =20 - tx_int_delay =3D phy_get_internal_delay(phydev, dev, NULL, 0, - false); - if (tx_int_delay <=3D 0) - rgmii_delay &=3D ~DP83822_TX_CLK_SHIFT; - else - rgmii_delay |=3D DP83822_TX_CLK_SHIFT; + /* Set DP83822_TX_CLK_SHIFT to disable tx clk internal delay */ + if (phy_get_internal_delay(phydev, dev, NULL, 0, false) <=3D 0) + rcsr |=3D DP83822_TX_CLK_SHIFT; =20 - if (rgmii_delay) { - err =3D phy_set_bits_mmd(phydev, DP83822_DEVADDR, - MII_DP83822_RCSR, rgmii_delay); - if (err) - return err; - } - - phy_set_bits_mmd(phydev, DP83822_DEVADDR, - MII_DP83822_RCSR, DP83822_RGMII_MODE_EN); - } else { - phy_clear_bits_mmd(phydev, DP83822_DEVADDR, - MII_DP83822_RCSR, DP83822_RGMII_MODE_EN); + rcsr_mask |=3D DP83822_RX_CLK_SHIFT | DP83822_TX_CLK_SHIFT; } =20 + err =3D phy_modify_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR, rcsr_ma= sk, rcsr); + if (err < 0) + return err; + if (dp83822->fx_enabled) { err =3D phy_modify(phydev, MII_DP83822_CTRL_2, DP83822_FX_ENABLE, 1); --=20 2.43.0