From patchwork Thu Feb 24 22:47:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 12759381 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 361F4C433EF for ; Thu, 24 Feb 2022 22:48:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4160210E8C9; Thu, 24 Feb 2022 22:48:15 +0000 (UTC) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by gabe.freedesktop.org (Postfix) with ESMTPS id 928EE10E8C9 for ; Thu, 24 Feb 2022 22:48:13 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 15E92B829B0; Thu, 24 Feb 2022 22:48:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A896C340E9; Thu, 24 Feb 2022 22:48:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645742890; bh=mq9dKAAdR4sGpDiR/XkJZTQe0eGrb9bDd12WMQAtQmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mc24Rd3hIVxAAQK95QfN76TVXOExNmM9OY0D4CWmRuE8yfUQoTAjqKWvUtMFX8fMi jYz55taNRg2zvko1TMuqGVWjNdmqEQS+b58c+eaBCiv9N4Dtj1WNL05NF1nAqzw63a 5sLJQ7tPVT8h1sbDzLLTa5SFoWF45aJj1d1a9b2pSW908CyeTIwo7ZgFzmyiA6tCV/ OL4C1HkkhbgJkSZ2PkGIrk2mI9jjVtEgI6Xuccbi6wrM5COk2s+WuBKT+xW21Hb73Z SS5bAV14+wGcdC+RbWnaeOgvQsndAK2M0ZyAw+xPANZnU8utPXtJs+qbUdSl3OdBIg VXO5gtS7Nc9hQ== From: Bjorn Helgaas To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann Subject: [PATCH v9 03/11] PCI/VGA: Factor out vga_select_framebuffer_device() Date: Thu, 24 Feb 2022 16:47:45 -0600 Message-Id: <20220224224753.297579-4-helgaas@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220224224753.297579-1-helgaas@kernel.org> References: <20220224224753.297579-1-helgaas@kernel.org> 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: , Cc: David Airlie , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, =?utf-8?q?Br?= =?utf-8?q?uno_Pr=C3=A9mont?= , Bjorn Helgaas , Xuefeng Li , Huacai Chen Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Bjorn Helgaas On x86 and ia64, if a VGA device BARs include a framebuffer reported by platform firmware, we select the device as the default VGA device. Factor this code to a separate function. No functional change intended. Signed-off-by: Bjorn Helgaas Cc: Bruno Prémont --- drivers/pci/vgaarb.c | 99 ++++++++++++++++++++++++-------------------- 1 file changed, 53 insertions(+), 46 deletions(-) diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c index 6c57ffb77770..3f8fead49197 100644 --- a/drivers/pci/vgaarb.c +++ b/drivers/pci/vgaarb.c @@ -565,6 +565,58 @@ void vga_put(struct pci_dev *pdev, unsigned int rsrc) } EXPORT_SYMBOL(vga_put); +static void __init vga_select_framebuffer_device(struct pci_dev *pdev) +{ +#if defined(CONFIG_X86) || defined(CONFIG_IA64) + struct device *dev = &pdev->dev; + u64 base = screen_info.lfb_base; + u64 size = screen_info.lfb_size; + u64 limit; + resource_size_t start, end; + unsigned long flags; + int i; + + /* Select the device owning the boot framebuffer if there is one */ + + 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(pdev, i); + + if ((flags & IORESOURCE_MEM) == 0) + continue; + + start = pci_resource_start(pdev, i); + end = pci_resource_end(pdev, i); + + if (!start || !end) + continue; + + if (base < start || limit >= end) + continue; + + if (!vga_default_device()) + vgaarb_info(dev, "setting as boot device\n"); + else if (pdev != vga_default_device()) + vgaarb_info(dev, "overriding boot device\n"); + vga_set_default_device(pdev); + } +#endif +} + static bool vga_arb_integrated_gpu(struct device *dev) { #if defined(CONFIG_ACPI) @@ -1446,54 +1498,9 @@ static void __init vga_arb_select_default_device(void) struct pci_dev *pdev, *found = NULL; struct vga_device *vgadev; -#if defined(CONFIG_X86) || defined(CONFIG_IA64) - u64 base = screen_info.lfb_base; - u64 size = screen_info.lfb_size; - u64 limit; - resource_size_t start, end; - unsigned long flags; - int i; - - if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - base |= (u64)screen_info.ext_lfb_base << 32; - - limit = base + size; - list_for_each_entry(vgadev, &vga_list, list) { - struct device *dev = &vgadev->pdev->dev; - /* - * 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 (!vga_default_device()) - vgaarb_info(dev, "setting as boot device\n"); - else if (vgadev->pdev != vga_default_device()) - vgaarb_info(dev, "overriding boot device\n"); - vga_set_default_device(vgadev->pdev); - } + vga_select_framebuffer_device(vgadev->pdev); } -#endif if (!vga_default_device()) { list_for_each_entry_reverse(vgadev, &vga_list, list) {