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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 B2D58CA90AF for ; Wed, 13 May 2020 14:01:33 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 16CD12064E for ; Wed, 13 May 2020 14:01:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16CD12064E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=physik.fu-berlin.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C9C326E97E; Wed, 13 May 2020 14:01:32 +0000 (UTC) Received: from outpost1.zedat.fu-berlin.de (outpost1.zedat.fu-berlin.de [130.133.4.66]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1EAA96E97E for ; Wed, 13 May 2020 14:01:32 +0000 (UTC) Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.93) with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (envelope-from ) id 1jYrww-0025mT-A7; Wed, 13 May 2020 16:01:30 +0200 Received: from 87-77-186-151.mna.fu-berlin.de ([87.77.186.151]) by inpost2.zedat.fu-berlin.de (Exim 4.93) with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (envelope-from ) id 1jYrww-003Jln-4G; Wed, 13 May 2020 16:01:30 +0200 Subject: Re: [RFC] Remove AGP support from Radeon/Nouveau/TTM To: Christian Zigotzky , Rui Salvaterra , =?UTF-8?Q?Michel_D=c3=a4nzer?= References: <69696543-7c0e-604d-ed29-721b1b99d44e@daenzer.net> <2612115a-eaa0-9bf9-1227-adbf7f75e1e7@daenzer.net> From: John Paul Adrian Glaubitz Autocrypt: addr=glaubitz@physik.fu-berlin.de; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Original-Sender: glaubitz@physik.fu-berlin.de X-Originating-IP: 87.77.186.151 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?Q?Christian_K=c3=b6nig?= , Maling list - DRI developers , "debian-powerpc@lists.debian.org" , "Karoly Balogh \(Charlie/SGR\)" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hello Christian! On 5/13/20 3:44 PM, Christian Zigotzky wrote: > AGP mode/support is deactivated on PowerPC and it doesn't work reliable???? > > And what does these lines mean: AGP mode is actually disabled in the Radeon driver for PowerPC as Alex has pointed out earlier in this thread [1]. Your graphics cards are basically running in PCI mode. I don't know, however, what the performance impact is when AGP mode is turned off. But it was turned off because it made PowerPC systems unstable. It also seems that AGP mode poses an additional maintenance burden for the KMS/DRM maintainers of the kernel so I understand the reasoning behind such a change. I wonder though whether it would make sense to move the support for older GPUs in legacy drivers, similar to what nVidia does with their commercial drivers. Thanks, Adrian > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=037d1a66ae640ca2723f47c0115ffa9e603699b3 > [2] https://bugs.freedesktop.org/show_bug.cgi?id=95017 -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz@debian.org `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel