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=-8.3 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,USER_AGENT_SANE_1 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 4A61FC7618B for ; Thu, 25 Jul 2019 15:15:27 +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 20BF52238C for ; Thu, 25 Jul 2019 15:15:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Y9R5LHIo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20BF52238C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com 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-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=MIe0VD+nmJpF5A1vF1cm8gffSgojuRzJ2reLSmaUPPo=; b=Y9R5LHIoPlob+zQ3o2fOgRlem 4swTjfTeTgklxUMBh+aCMWN48eYczP4E1PszH7tew9T9zo5zsoIzh0PQ4rl++SHWddQ/GURpqhUz7 t4REIDRHwDdYMY+WmxYQ7mwkWxQggzjOjl2q8w+0KRuAOpKx5ujqB1DKXqCtzCA63WGXscy1RvFXw k6Vgwx7iSXnJ0aGMBImB+zf+fuiJU9JuUg6p7SmCPJu4ukVN2F+AiCBY+rEF1nSSH838nZIm5F2PJ dQa/YgIqwo0Y6vTGArHz74VSutsCZuX6nxJYD3xl0O0Gu8qnzsJfqKPo5aEEBibrqK2MIudYYbPlQ oupi07NGw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hqfSm-0004G4-D4; Thu, 25 Jul 2019 15:15:24 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hqfSj-0004FL-5r for linux-arm-kernel@lists.infradead.org; Thu, 25 Jul 2019 15:15:22 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 99079344; Thu, 25 Jul 2019 08:15:18 -0700 (PDT) Received: from [10.1.197.57] (e110467-lin.cambridge.arm.com [10.1.197.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5C78E3F71A; Thu, 25 Jul 2019 08:15:17 -0700 (PDT) Subject: Re: [PATCH] arm64: dts: fast models: Increase clcd's max-memory-bandwidth To: Kevin Brodsky , linux-arm-kernel@lists.infradead.org References: <20190725145040.42182-1-kevin.brodsky@arm.com> From: Robin Murphy Message-ID: <042d5c3d-96fe-5466-3869-a0a3a08b964d@arm.com> Date: Thu, 25 Jul 2019 16:15:16 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190725145040.42182-1-kevin.brodsky@arm.com> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190725_081521_265950_562C668A X-CRM114-Status: GOOD ( 19.69 ) 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: devicetree@vger.kernel.org, Pawel Moll , Ruben Ayrapetyan , Linus Walleij , Liviu Dudau , dri-devel@lists.freedesktop.org, Sudeep Holla , Brian Starkey Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Kevin, On 25/07/2019 15:50, Kevin Brodsky wrote: > It may be desirable on certain platforms, such as Android, to > use 32bpp buffers. Since there is no clear bandwidth limit for the > CLCD component on the fast model, let's increase > max-memory-bandwidth to allow using 32bpp buffers. Given that the property is optional anyway, would it hurt to just remove it? After trying to dig up any relevant internal email history, it's still far from clear how and why it got here in the first place. Robin. > Reported-by: Ruben Ayrapetyan > Signed-off-by: Kevin Brodsky > --- > arch/arm64/boot/dts/arm/fvp-base-revc.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/arm/fvp-base-revc.dts b/arch/arm64/boot/dts/arm/fvp-base-revc.dts > index 687707020ec1..3aee49ed6d88 100644 > --- a/arch/arm64/boot/dts/arm/fvp-base-revc.dts > +++ b/arch/arm64/boot/dts/arm/fvp-base-revc.dts > @@ -269,7 +269,7 @@ > motherboard { > iofpga@3,00000000 { > clcd@1f0000 { > - max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */ > + max-memory-bandwidth = <260000000>; /* 32bpp @ 63.5MHz */ > }; > }; > }; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel