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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 3E7CDCA9EB5 for ; Mon, 4 Nov 2019 13:55:07 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E4B6C20869 for ; Mon, 4 Nov 2019 13:55:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rdQppMdi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E4B6C20869 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0rUInDpVK1SQwhaNHHalwga5mTwSA21d1ijGx/GJF2w=; b=rdQppMdiVdfHsO Zhs7X1Je6Z99p0ib+Wbt2Lheu86VoDckDfw4PlU8zNvpMe6ILRfujBotGj2jN7O7z2xUuHLlg/+vl 327Ho2z0PzoVxS/PWAea3msJGonjMeMKKzsUVSZ5yw7N3KAhGptp/bvY2oc917m3jIQ0yXGVp83s9 vNDE6dS4J+ebttkxzd6QUydqAViEQov2QPXppM41+IyNDXkiSKkz3UHFYY2zeuaXg3IcxOySZZWgU cwriS5UrWzWJtW2yeI5YLPNzPdD85SB1R4QSJeSybTqtK+LIJkvZG65tsKcczJ8tQ40QftJOux+6n lYUjxsr7zTqNdnXH4b7g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iRcot-000239-KV; Mon, 04 Nov 2019 13:54:59 +0000 Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iRcok-0001t9-Ub; Mon, 04 Nov 2019 13:54:52 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 05295AE07; Mon, 4 Nov 2019 13:54:47 +0000 (UTC) From: Nicolas Saenz Julienne To: catalin.marinas@arm.com, devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Rob Herring , Mark Rutland , Eric Anholt , Stefan Wahren Subject: [PATCH 1/2] ARM: dts: bcm2711: force CMA into first GB of memory Date: Mon, 4 Nov 2019 14:54:11 +0100 Message-Id: <20191104135412.32118-2-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191104135412.32118-1-nsaenzjulienne@suse.de> References: <20191104135412.32118-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191104_055451_130054_1ED7AB53 X-CRM114-Status: GOOD ( 12.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, Nicolas Saenz Julienne Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org arm64 places the CMA in ZONE_DMA32, which is not good enough for the Raspberry Pi 4 since it contains peripherals that can only address the first GB of memory. Explicitly place the CMA into that area. Signed-off-by: Nicolas Saenz Julienne --- arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts index cccc1ccd19be..3c7833e9005a 100644 --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts @@ -19,6 +19,25 @@ reg = <0 0 0>; }; + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + ranges; + + /* + * arm64 reserves the CMA by default somewhere in ZONE_DMA32, + * that's not good enough for the Raspberry Pi 4 as some + * devices can only address the lower 1G of memory (ZONE_DMA). + */ + linux,cma { + compatible = "shared-dma-pool"; + size = <0x2000000>; /* 32MB */ + alloc-ranges = <0x0 0x00000000 0x40000000>; + reusable; + linux,cma-default; + }; + }; + leds { act { gpios = <&gpio 42 GPIO_ACTIVE_HIGH>; -- 2.23.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel