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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id AB8ADEB64DC for ; Thu, 20 Jul 2023 10:23:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 380A210E592; Thu, 20 Jul 2023 10:23:19 +0000 (UTC) Received: from out-61.mta1.migadu.com (out-61.mta1.migadu.com [95.215.58.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id A270010E12A for ; Wed, 19 Jul 2023 22:44:51 +0000 (UTC) Message-ID: <74994ce2-c060-f662-9210-14d09a15162f@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1689806688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fjbO79xlLNloGHqzkmh/GrwE5dqq196RqzVZxz+HQuY=; b=tyL+5EjVO88fUgTXUzZJvKY+JfMezNTNqLlky4Key7ELBF1/bJEXZwIzwfXEU5giFkbOHo bs2sLXFvTbu5KRkClnah41uJLYUoPnho/GiocT6aPhwta72XhksZVZ/iUoXF/ZG9ZHo7Cc K41KgUorxkZsDqez3UfEW48aM4qvmjI= Date: Thu, 20 Jul 2023 06:44:29 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v3 4/9] PCI/VGA: Improve the default VGA device selection Content-Language: en-US To: suijingfeng , Bjorn Helgaas References: <20230719193233.GA511659@bhelgaas> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Sui Jingfeng In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-Mailman-Approved-At: Thu, 20 Jul 2023 10:23:18 +0000 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Cornelia Huck , Karol Herbst , linux-pci@vger.kernel.org, Joonas Lahtinen , dri-devel@lists.freedesktop.org, YiPeng Chai , Mario Limonciello , Likun Gao , David Airlie , Ville Syrjala , Yi Liu , kvm@vger.kernel.org, amd-gfx@lists.freedesktop.org, Jason Gunthorpe , Ben Skeggs , Kevin Tian , Lijo Lazar , Thomas Zimmermann , Jani Nikula , Bokun Zhang , intel-gfx@lists.freedesktop.org, Maarten Lankhorst , Jani Nikula , Alex Williamson , Abhishek Sahu , Maxime Ripard , Rodrigo Vivi , Bjorn Helgaas , Tvrtko Ursulin , Yishai Hadas , Pan Xinhui , linux-kernel@vger.kernel.org, Daniel Vetter , Alex Deucher , Christian Konig , Hawking Zhang Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" On 2023/7/20 06:32, suijingfeng wrote: > it will be works no matter CONFIG_DRM_AST=m or CONFIG_DRM_AST=y It will be works regardless of CONFIG_DRM_AST=m or CONFIG_DRM_AST=y. When vgaarb call to the device driver, device driver already loaded successfully. and the PCI(e) device emulation already finished. So the last change the vgaarb gave us to override is actually happen very late. But it will be happen as long as the device driver get loaded successfully.