From patchwork Sat Sep 11 09:30:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huacai Chen X-Patchwork-Id: 12486283 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E4E4AC433F5 for ; Sat, 11 Sep 2021 09:36:09 +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 B3B7A611B0 for ; Sat, 11 Sep 2021 09:36:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B3B7A611B0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E6D1E6EB61; Sat, 11 Sep 2021 09:36:08 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id ED2A46EB61 for ; Sat, 11 Sep 2021 09:36:07 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id D9AE460F9D; Sat, 11 Sep 2021 09:36:04 +0000 (UTC) From: Huacai Chen To: David Airlie , Daniel Vetter , Bjorn Helgaas Cc: linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, Xuefeng Li , Huacai Chen , Huacai Chen Subject: [PATCH V5 06/11] PCI/VGA: Update default VGA device again for X86/IA64 Date: Sat, 11 Sep 2021 17:30:51 +0800 Message-Id: <20210911093056.1555274-7-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210911093056.1555274-1-chenhuacai@loongson.cn> References: <20210911093056.1555274-1-chenhuacai@loongson.cn> MIME-Version: 1.0 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch is the third step of the rework: On X86 and IA64 platform, update default VGA device if the new found device owns the firmware framebuffer. Signed-off-by: Huacai Chen --- drivers/pci/vgaarb.c | 45 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c index 02b68810273a..c768365138b6 100644 --- a/drivers/pci/vgaarb.c +++ b/drivers/pci/vgaarb.c @@ -584,6 +584,14 @@ static void vga_arb_update_default_device(struct vga_device *vgadev) struct pci_dev *pdev = vgadev->pdev; struct device *dev = &pdev->dev; struct vga_device *vgadev_default; +#if defined(CONFIG_X86) || defined(CONFIG_IA64) + int i; + unsigned long flags; + u64 base = screen_info.lfb_base; + u64 size = screen_info.lfb_size; + u64 limit; + resource_size_t start, end; +#endif /* * If we don't have a default VGA device yet, and this device owns @@ -610,6 +618,43 @@ static void vga_arb_update_default_device(struct vga_device *vgadev) vgaarb_info(dev, "overriding boot VGA device\n"); vga_set_default_device(pdev); } + +#if defined(CONFIG_X86) || defined(CONFIG_IA64) + if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)screen_info.ext_lfb_base << 32; + + limit = base + size; + + /* + * Override vga_arbiter_add_pci_device()'s I/O based detection + * as it may take the wrong device (e.g. on Apple system under + * EFI). + * + * Select the device owning the boot framebuffer if there is + * one. + */ + + /* Does firmware framebuffer belong to us? */ + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + flags = pci_resource_flags(vgadev->pdev, i); + + if ((flags & IORESOURCE_MEM) == 0) + continue; + + start = pci_resource_start(vgadev->pdev, i); + end = pci_resource_end(vgadev->pdev, i); + + if (!start || !end) + continue; + + if (base < start || limit >= end) + continue; + + if (vgadev->pdev != vga_default_device()) + vgaarb_info(dev, "overriding boot device\n"); + vga_set_default_device(vgadev->pdev); + } +#endif } /*