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 CF7AACCF2D6 for ; Mon, 19 Oct 2026 13:25:39 +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:References:In-Reply-To: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:List-Owner; bh=UuFuN1oxKEfnvw+6wAwkdT8F1FrmY0AhYnpatZF4Q4g=; b=RkkRfga4LtiCbUxcr8yK/0AeB8 cmYphu4FkhaGagG5dVbi0wBvw6+EM6tF9o+rWnQBdkq4GztWaKvpqJAoRoA43hyObXGkV2JD9ocBR rQ4urrSS8yvN1yxraGu/XkzF4thySFPzMFWoVov1SlOnaO/rot3a7YDhn7iuqt2t0ZPtZcSxk9bB7 gMQgN1lQDW6wtI/9xji6KhWthXpPks5CwK3O45TNCJyYzbzs8t8WKaUmJtfNmRnb0Wwz/K0Ig6gY/ lw2/cdbBmFD/pIwRWg4Bj1vTGEXiEu36eUXaDzKvARZIuiCQ07fYf37schQfccIqtpYGks1FSF4wm YEeQpeGQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xInMo-00000007Vlz-49na; Mon, 19 Oct 2026 13:25:30 +0000 Received: from nimiomail.com ([217.160.32.16]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xInMl-00000007VkW-3PXm; Mon, 19 Oct 2026 13:25:30 +0000 Received: from nimiomail.com (localhost.localdomain [127.0.0.1]) by nimiomail.com (Postfix) with ESMTP id 4BE2981700; Mon, 19 Oct 2026 15:25:24 +0200 (CEST) Authentication-Results: nimiomail.com (amavis) (amavisd-new); dkim=pass (2048-bit key) header.d=gluon.es Received: from nimiomail.com ([127.0.0.1]) by nimiomail.com (nimiomail.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ui28TZHKyGdY; Mon, 19 Oct 2026 15:25:23 +0200 (CEST) Received: from DESKTOP-2QFDG0H.tail76f4b.ts.net (21.red-2-139-241.staticip.rima-tde.net [2.139.241.21]) by nimiomail.com (Postfix) with ESMTPSA id 9759680C3B; Mon, 19 Oct 2026 15:25:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gluon.es; s=default; t=1792416323; bh=UuFuN1oxKEfnvw+6wAwkdT8F1FrmY0AhYnpatZF4Q4g=; h=From:To:Subject; b=IQHUfwV7yw62rgNEWUYH5woMq0H871U/xN3bYCH7ngoEoHNNMv3dp8B3yKkAdnggb j4iBG71UuvYWMD/rVCCUxbl90rY5iUD1qTyX4cQBDjYaOXFyo/um0fR+3gFEbJQwI0 xqgUfd5e2AZ6mVl6bFWZobgfmRQsdNnFOcV8Jg5LinGWEpXBg3XQMbqxujyx9F1yTl dnQPOe+yousYddfhp/5GizNy0ow0A9r4DPvdVqSaDXCHWLEhnFNhbS4UhpVspUwlNn McBMAgrBUSGZL31Kx4f9aJiflrQ5ndzcYMsmbHJCWPXaETXpWj5Cdlug/vece4JjNy Del2rES0Q9ytA== Authentication-Results: nimiomail.com; spf=pass (sender IP is 2.139.241.21) smtp.mailfrom=info@gluon.es smtp.helo=DESKTOP-2QFDG0H.tail76f4b.ts.net Received-SPF: pass (nimiomail.com: connection is authenticated) From: Miguel Jesus Seron Gonzalez To: Dongjin Kim Cc: Chukun Pan , Heiko Stuebner , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value Date: Mon, 19 Oct 2026 15:25:13 +0200 Message-ID: <20261019132513.879-1-info@gluon.es> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: <20250819075522.2238643-1-tobetter@gmail.com> <20250819151019.877709-1-amadeus@jmu.edu.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-PPP-Message-ID: <179241632328.1079602.4812919760712785367@nimiomail.com> X-PPP-Vhost: gluon.es X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261019_062528_307601_E782F8C4 X-CRM114-Status: GOOD ( 12.22 ) 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 Hi Dongjin, On Wed, Aug 20, 2025 at 11:40:44AM +0900, Dongjin Kim wrote: > Thank you for suggesting me to try 'rgmii-id' again. > > I'd remember that 'rgmii-id' didn't work with the very early version of > the board, however your suggestion works. Let me test the change with > more boards and submit the new patch when it's done. I ran into the same problem on an ODROID-M1 board marked "REV 1.0 20211112", an earlier revision than the 20220613 one in your patch, running Home Assistant OS (kernel 6.18.52). With the current tx_delay = <0x4f>, about 6.6% of all TCP segments were retransmitted at 1000 Mbit/s and larger HTTP transfers stalled. I tested Chukun's suggestion (phy-mode = "rgmii-id", with tx_delay and rx_delay removed; the driver reports "init for RGMII_ID") on the same board, on a 1000 Mbit/s full-duplex link. It works fine on this early revision as well: - 3 retransmitted TCP segments out of 24929 (0.012%) over 3 h 49 min of uptime, and no RX/TX errors - 90 sequential requests for large files (22.5 MB in total): no failures, 1.4 s in total, the slowest one 47 ms - 120 parallel requests (75 MB in total): no failures, 1.2 s For comparison, tx_delay = <0x35> gave 0.03% retransmissions on the same board. Are you still planning to send a v3 with rgmii-id? If you don't have time for it, I'd be happy to send it with Chukun's Suggested-by. Either way, for the rgmii-id version: Tested-by: Miguel Jesus Seron Gonzalez Thanks, Miguel