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 X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02E84C4BA18 for ; Wed, 26 Feb 2020 17:17:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFA39206E6 for ; Wed, 26 Feb 2020 17:17:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=raspberrypi.com header.i=@raspberrypi.com header.b="KPTIuJ6h" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726694AbgBZRRf (ORCPT ); Wed, 26 Feb 2020 12:17:35 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:39597 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726151AbgBZRRf (ORCPT ); Wed, 26 Feb 2020 12:17:35 -0500 Received: by mail-wm1-f67.google.com with SMTP id c84so47509wme.4 for ; Wed, 26 Feb 2020 09:17:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raspberrypi.com; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=D5NgFvpvyGD2NAkidGgia/jVmr0ryRkNn23SZkfip3U=; b=KPTIuJ6hOKN4eNm6446oV+ufMfdLlLPWUE/tcfYlDyTvUttjmb4fzCSa0EzUQQTqQd 4A6Lk8gDTE75gNGQNVL7pThfh+KOKigyKwqXaZmiVC0p6B4Tvs0pwoFlJ7elicCo8hrn WchqZZ8SHT/si1iGF31t/ZKMIEwvTsxHMUqr43GAELsgjrORQeYSKwABRgw02f/xA3Zw 4vK0eYbFLJal+Ic4ZjMmDqgc9per9KH3xgnJeg3epqAhAdt8fRkPfoAZryfDW+Ev5n59 K+UKrDlgGf+BZdmaLwxciFqLtwmoDJVZAHZVRhIt2/WIglamTAcdGRk9VzdwR1vk003J rk1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=D5NgFvpvyGD2NAkidGgia/jVmr0ryRkNn23SZkfip3U=; b=jsDueHASThP+jV9a6bPxtIC5WiPv8WPvh3efkkkFGq946HXc7O7RKdUJQSlci3g+lO nGNqW0KwFfrpkz4l5V+Zd/ji1x7LVSTRXM0rIAELxEwAskovO6vFGiL6kdKjhTZZEMgQ Nawv+4Zh+k+tNmY7mUA9nJbDSJn0wzLtDmE6UirClW4aLxkTCgBWx58aC+IsHfUFQo3E sXE47WnOOqSkRCF/8YiWDqdCrliIbKTp7X0GzG5P6jRWVBMroIC6jMNuKOWwzwfXzyxB Fsf0Fj6FccLfxA59Xt9uWZfwVvkCoM3By/K0I0gjBz6DzfWMmff3x/Quxup+TEaDHYKg 7Y3A== X-Gm-Message-State: APjAAAUDQeUAM9WluK6abkL6y7J8HFOpQx8lGWnwqZvTVUc06IrxHlIJ nwneoRQiRIa+kYYqx/RUVhaUddolTe8Uog== X-Google-Smtp-Source: APXvYqxrttVIAUjGEZgZ4W32J3SfMG1F9ArDXDphkR2AMS3TDMpZqL7cqVnwvPG+nsAXG0VspMUfLw== X-Received: by 2002:a05:600c:299:: with SMTP id 25mr6704261wmk.68.1582737451052; Wed, 26 Feb 2020 09:17:31 -0800 (PST) Received: from ?IPv6:2a00:1098:3142:14:a5b1:f6ea:e382:15d7? ([2a00:1098:3142:14:a5b1:f6ea:e382:15d7]) by smtp.gmail.com with ESMTPSA id z21sm3719210wml.5.2020.02.26.09.17.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 Feb 2020 09:17:30 -0800 (PST) Subject: Re: [PATCH] ARM: dts: bcm2711: Add pcie0 alias To: Nicolas Saenz Julienne , Rob Herring , Florian Fainelli Cc: phil@raspberrypi.org, devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20200226164601.20150-1-nsaenzjulienne@suse.de> From: Phil Elwell Message-ID: <51e9f945-b047-eb66-28c0-54d467ce51a7@raspberrypi.com> Date: Wed, 26 Feb 2020 17:17:30 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200226164601.20150-1-nsaenzjulienne@suse.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Nicolas, On 26/02/2020 16:46, Nicolas Saenz Julienne wrote: > Some bcm2711 revisions have different DMA constraints on the their PCIE > bus. The lower common denominator, being able to access the lower 3GB of > memory, is the default setting for now. Newer SoC revisions are able to > access the whole memory space. > > Raspberry Pi 4's firmware is aware of this limitation and will correct > the PCIE's dma-ranges property if a pcie0 alias is available. So add > it. I can confirm that this is exactly what the firmware is looking for, so Reviewed-by: Phil Elwell Phil