From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 15CB0D59F44 for ; Fri, 12 Dec 2025 22:02:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=750ln4d5IZ+5twsG5klcrtotTQHvrYbgJe5RP9Qdpfk=; b=LcAwk4RLbCjASYN4z0l8G6m/G2 Gq/AAWXYZJvVSEKFss7APN1qiyIsfp2GyyUxFw/pZmT5hrZAzOi47knIfcDlPjiHrWjzUHfrffwmY 5Ee0QZ/1kSM4MI3e7O6NOcLAzmXvaT58kzyHFzUmzl5KgcKCArE1htWUH+Zu69UpWhytJlm0dhMMC f6tCO07Nsy2fFubMnglF13sL02CBEy0F/mu/cwtQ0jsFKS7ESzVTQEKMJG9DXE/9RlbT8tX+JxPtq AZO2VHvBx7DrAq85XpvOvnJt6pIojVn9ppqekkEDHa6cN2NWRB+5L1TrmselqKql16xKPNfPOoI16 JcDN0NYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vUBDb-000000018Su-0PZI; Fri, 12 Dec 2025 22:02:31 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vUBDY-000000018SI-0k8D for linux-arm-kernel@lists.infradead.org; Fri, 12 Dec 2025 22:02:29 +0000 Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id E300D240103 for ; Fri, 12 Dec 2025 23:02:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1765576944; bh=750ln4d5IZ+5twsG5klcrtotTQHvrYbgJe5RP9Qdpfk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version: Content-Transfer-Encoding:From; b=bzVvM2e8Gea+qx5rdLE5QGllabmTMstWgWUcVFNe3oqv9SBq6UB54wNhxC8LIsqza v8Ai3PIOtsEmze425tkEFdLgM/gEHd18OEdwJTluPqWATXiSJ3bHBYJKMV6j+kewWu fRjYu931PtKNRK69lAmpkyHVe8Yp//i5ffMG4REaL3dox4QYXuUEUn/KmkvWfDhzJl lhZwzvUDoCzRQvELQPbt2zCwXazAPo2hcJyIRFeAMH4mdK/hcgqc5k+K7TOp/nGkMq G6tm9pnPkW8a54EOu/2hSP2XnFErAh36niRdBH9zIdT9xWZpRB57NjKr0t3nRJ/mxr GTzQo7sZZF7wA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4dSk2l69Nsz9rxL; Fri, 12 Dec 2025 23:02:23 +0100 (CET) From: Adrian Kossmann To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner Cc: Adrian Kossmann , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] arm64: dts: rockchip: Adjust RGMII TXD/RXD delays for the Rock Pi E Date: Fri, 12 Dec 2025 22:02:24 +0000 Message-ID: <20251212220151.574860-1-adrian.kossmann@posteo.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251212_140228_356683_F707439A X-CRM114-Status: UNSURE ( 9.92 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Current RGMII TXD/RXD delay results in link instability under load, with throughput eventually dropping to zero. Adjust the RGMII TXD/RXD delay values for stable link under load and stable Gigabit throughput Signed-off-by: Adrian Kossmann --- Changes in v2: - Changed the patch subject as the last one contained incorrect changes - Drop incorrect PHY compatible string change from v1 - Adjustments to RGMII RX/TX delay values - Link to v1: https://lore.kernel.org/linux-rockchip/20251209210658.458506-2-adrian.kossmann@posteo.de/ arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts b/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts index a4bdd87d0729..29ff0b8b8f18 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-rock-pi-e.dts @@ -153,8 +153,8 @@ &gmac2io { phy-supply = <&vcc_io>; pinctrl-names = "default"; pinctrl-0 = <&rgmiim1_pins>; - tx_delay = <0x26>; - rx_delay = <0x11>; + tx_delay = <0x1a>; + rx_delay = <0x14>; status = "okay"; mdio { -- 2.52.0