Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932425Ab2FWArC (ORCPT ); Fri, 22 Jun 2012 20:47:02 -0400 Received: from mail-lb0-f174.google.com ([209.85.217.174]:61097 "EHLO mail-lb0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756736Ab2FWArA convert rfc822-to-8bit (ORCPT ); Fri, 22 Jun 2012 20:47:00 -0400 MIME-Version: 1.0 In-Reply-To: <20120622111131.GB18249@linux-mips.org> References: <1340334073-17804-1-git-send-email-chenhc@lemote.com> <1340334073-17804-12-git-send-email-chenhc@lemote.com> <87txy3sn20.fsf@lebrac.rtp-net.org> <20120622111131.GB18249@linux-mips.org> Date: Sat, 23 Jun 2012 08:46:59 +0800 Message-ID: Subject: Re: [PATCH V3 11/16] drm/radeon: Make radeon card usable for Loongson. From: Huacai Chen To: Ralf Baechle Cc: Arnaud Patard , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, Fuxin Zhang , Zhangjin Wu , Huacai Chen , Hongliang Tao , Hua Yan , dri-devel@lists.freedesktop.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1006 Lines: 21 On Fri, Jun 22, 2012 at 7:11 PM, Ralf Baechle wrote: > On Fri, Jun 22, 2012 at 06:55:40PM +0800, Huacai Chen wrote: > >> > btw, would it be a good idea to use uncached accelerated instead ? >> I have tried uncached accelerated, there will be random points in the >> monitor, it seems a hw issue... > > Have you flushed the pages from memory before switching their cache mode > to uncached accelerated? ?The MIPS architecture defines the result of > mixing cache modes as UNPREDICTABLE so be careful to flush caches before > switching cache mode of a page. Not because of flushing, CPU designing team told us a method but very complex, and that method will cause other performance drop. So, we won't use uncached accelerate mode. > > ?Ralf -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/