From patchwork Mon Sep 4 19:57:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng X-Patchwork-Id: 13374297 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 C5DC9C71153 for ; Mon, 4 Sep 2023 20:05:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EDBDE10E3FB; Mon, 4 Sep 2023 20:05:37 +0000 (UTC) X-Greylist: delayed 471 seconds by postgrey-1.36 at gabe; Mon, 04 Sep 2023 20:05:31 UTC Received: from out-229.mta1.migadu.com (out-229.mta1.migadu.com [IPv6:2001:41d0:203:375::e5]) by gabe.freedesktop.org (Postfix) with ESMTPS id D1C3810E3F7 for ; Mon, 4 Sep 2023 20:05:31 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693857462; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Kmuyy5d8TjfKPYFKMrpKxMdJxlBIiyPktdk9/3dqaTc=; b=MRbIL1ezV+MLDlrq8FrN2e2iqKWOCBSzCMXu00ItCM4BykmOR85mcBF+KstvvBGs6g1CU3 mO/B8rdGeNOFX1B78Vqej0MqiBxruE4A0+Vuxx2Pu/ErmZJgbG1UNtUYiHBqabuPRdixNg 0+mVRFLiH5Q5VIHnOltwIszhLHFeGRg= From: Sui Jingfeng To: Bjorn Helgaas Date: Tue, 5 Sep 2023 03:57:18 +0800 Message-Id: <20230904195724.633404-4-sui.jingfeng@linux.dev> In-Reply-To: <20230904195724.633404-1-sui.jingfeng@linux.dev> References: <20230904195724.633404-1-sui.jingfeng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Subject: [Intel-gfx] [RFC, drm-misc-next v4 3/9] drm/radeon: Implement .be_primary() callback X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sui Jingfeng , nouveau@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-pci@vger.kernel.org, Alex Deucher , Christian Koenig Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Sui Jingfeng On a machine with multiple GPUs, a Linux user has no control over which one is primary at boot time. This patch tries to solve the mentioned problem by implementing the .be_primary() callback. Pass radeon.modeset=10 on the kernel cmd line if you really want the device bound by radeon to be the primary video adapter, no matter what VGAARB say. Cc: Alex Deucher Cc: Christian Koenig Signed-off-by: Sui Jingfeng --- drivers/gpu/drm/radeon/radeon_device.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 71f2ff39d6a1..b661cd3a8dc2 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -1263,6 +1263,14 @@ static const struct vga_switcheroo_client_ops radeon_switcheroo_ops = { .can_switch = radeon_switcheroo_can_switch, }; +static bool radeon_want_to_be_primary(struct pci_dev *pdev) +{ + if (radeon_modeset == 10) + return true; + + return false; +} + /** * radeon_device_init - initialize the driver * @@ -1425,7 +1433,7 @@ int radeon_device_init(struct radeon_device *rdev, /* if we have > 1 VGA cards, then disable the radeon VGA resources */ /* this will fail for cards that aren't VGA class devices, just * ignore it */ - vga_client_register(rdev->pdev, radeon_vga_set_decode, NULL); + vga_client_register(rdev->pdev, radeon_vga_set_decode, radeon_want_to_be_primary); if (rdev->flags & RADEON_IS_PX) runtime = true;