Received: by 2002:a05:6a10:1a4d:0:0:0:0 with SMTP id nk13csp201294pxb; Mon, 31 Jan 2022 19:36:59 -0800 (PST) X-Google-Smtp-Source: ABdhPJztnNDEVr1Onm+XdsOxovuSu1FE/EI8U7gYhVXBsTINTZpveDZwXcpZAR7a3/IoabPk8HlR X-Received: by 2002:a17:90b:4b4b:: with SMTP id mi11mr63282pjb.103.1643686618859; Mon, 31 Jan 2022 19:36:58 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1643686618; cv=none; d=google.com; s=arc-20160816; b=Ua6j641/2LRtGU4ZPp0EeWiORF9liBaGPENU3bFHJrhc97JpHkXrnGAWq4b9gqJ2Bq yXmOpn8cB+uKExBGX0kJozQkGAE8mD2V0eCphCe4RKOMwIGG9ErfxgLAPet50hcsLAd/ jiP9trmgnvYRRBqchB/fRwooe0D8LbVZSboB7NoneZqeOHh/8fWMLsYm/E4jubn/b3Yc OsbNU91e+TqhsTj8Shkuipbg7lXdlP4KdXsqgmp/qWLBbAhgcmURPpDFDdbBh2ffAVB+ YvmnLratZehWr+8Vwsq+akn9WByIcWaaznEh4lSGC5HPRyD2ksDJpTSNkXmBSH93vv7g 7QlQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=G/P3w2QO56gHkUccxjCXu93pxnOCseIJnwz3LNUuDEE=; b=sBybNB7XPwki3uOUSXVKdiW8eEqknBrXicproGHxl2BmutJg5/xEbZte6pVEZ0u2cI WZJ2HAEuBxsXN1TVn/WpQQ35T2pC4VGbrnBqH18BdZzAAwCv3D+lnZS52er5Fpm4/00B L0KfCaN7kK4tXcpu6hUnyK+nA1L3N8vG1+sWjvPxQxBO/kRLVfJ6pa/N8wvFPEsq1Iks AHSSPBtogbMIUR+ochFrlvFBF3MT49sufGDieQ7PRmNxRDqFDsv0xOXtwWbdbbyNLiFZ MkE8j4LUASYNf1P7XyjfhSamW50hNo+rxBZbeHVul59SrJ7nFMJaq+mtqfl9AeZQB844 Xu+g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id e12si15213160plh.484.2022.01.31.19.36.46; Mon, 31 Jan 2022 19:36:58 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352846AbiA2R5u (ORCPT + 99 others); Sat, 29 Jan 2022 12:57:50 -0500 Received: from gloria.sntech.de ([185.11.138.130]:49014 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346274AbiA2R5m (ORCPT ); Sat, 29 Jan 2022 12:57:42 -0500 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nDryj-0005eg-E7; Sat, 29 Jan 2022 18:57:37 +0100 From: Heiko Stuebner To: "quentin.schulz@theobroma-systems.com" , robh+dt@kernel.org Cc: Heiko Stuebner , Jakob Unterwurzacher , linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Quentin Schulz , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: Re: [PATCH] arm64: dts: rockchip: fix rk3399-puma eMMC HS400 signal integrity Date: Sat, 29 Jan 2022 18:57:40 +0100 Message-Id: <164347899463.1472860.17160610322270835288.b4-ty@sntech.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220119134948.1444965-1-quentin.schulz@theobroma-systems.com> References: <20220119134948.1444965-1-quentin.schulz@theobroma-systems.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 19 Jan 2022 14:49:48 +0100, quentin.schulz@theobroma-systems.com wrote: > There are signal integrity issues running the eMMC at 200MHz on Puma > RK3399-Q7. > > Similar to the work-around found for RK3399 Gru boards, lowering the > frequency to 100MHz made the eMMC much more stable, so let's lower the > frequency to 100MHz. > > [...] Applied, thanks! [1/1] arm64: dts: rockchip: fix rk3399-puma eMMC HS400 signal integrity commit: 7623e16af6bac131305292eb99cea988adbf0484 Best regards, -- Heiko Stuebner