Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752582AbcD1N4q (ORCPT ); Thu, 28 Apr 2016 09:56:46 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:35469 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751534AbcD1N4n (ORCPT ); Thu, 28 Apr 2016 09:56:43 -0400 Subject: Re: [PATCH 2/2] ARC: [axs10x] Specify reserved memory for frame buffer To: Alexey Brodkin References: <1461767701-12208-1-git-send-email-abrodkin@synopsys.com> <1461767701-12208-3-git-send-email-abrodkin@synopsys.com> <572190F3.3020709@synopsys.com> <1461851171.3673.30.camel@synopsys.com> Cc: "dri-devel@lists.freedesktop.org" , lkml , "devicetree@vger.kernel.org" , arcml From: Vineet Gupta Organization: Synopsys Message-ID: <57221693.50401@synopsys.com> Date: Thu, 28 Apr 2016 19:26:35 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1461851171.3673.30.camel@synopsys.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 555 Lines: 11 On Thursday 28 April 2016 07:16 PM, Alexey Brodkin wrote: >> > Note that the IOC start alignment needs to follow >> > max(4k, size). What will be maximum size of frame buffer - 16M always ! > What do you mean by that? For HS38, we intend to bypass the frame buffer traffic from IOC port. So the frame buffer start needs to be inside the IOC aperture base address. That value can't be arbitrary - it is atleast 4K aligned value and further also needs to be aligned to the size of aperture. So if the size is 16M it needs to be 16M aligned etc... -Vineet