From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755316Ab2DPU03 (ORCPT ); Mon, 16 Apr 2012 16:26:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1184 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754698Ab2DPU01 (ORCPT ); Mon, 16 Apr 2012 16:26:27 -0400 From: Matthew Garrett To: linux-kernel@vger.kernel.org Cc: Matthew Garrett , benh@kernel.crashing.org, airlied@redhat.com Subject: [PATCH V2 1/4] vgaarb: Add support for setting the default video device Date: Mon, 16 Apr 2012 16:26:02 -0400 Message-Id: <1334607965-9582-1-git-send-email-mjg@redhat.com> X-SA-Do-Not-Run: Yes X-SA-Exim-Connect-IP: 66.187.233.202 X-SA-Exim-Mail-From: mjg@redhat.com X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The default VGA device is a somewhat fluid concept on platforms with multiple GPUs. Add support for setting it so switching code can update things appropriately, and make sure that the sysfs code returns the right device if it's changed. Signed-off-by: Matthew Garrett Cc: benh@kernel.crashing.org Cc: airlied@redhat.com --- Updated to fix builds when __ARCH_HAS_VGA_DEFAULT_DEVICE is false. drivers/gpu/vga/vgaarb.c | 7 +++++++ drivers/pci/pci-sysfs.c | 5 +++++ include/linux/vgaarb.h | 2 ++ 3 files changed, 14 insertions(+) diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index 111d956..e223b96 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -136,6 +136,11 @@ struct pci_dev *vga_default_device(void) { return vga_default; } + +void vga_set_default_device(struct pci_dev *pdev) +{ + vga_default = pdev; +} #endif static inline void vga_irq_set_state(struct vga_device *vgadev, bool state) @@ -605,10 +610,12 @@ static bool vga_arbiter_del_pci_device(struct pci_dev *pdev) goto bail; } +#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE if (vga_default == pdev) { pci_dev_put(vga_default); vga_default = NULL; } +#endif if (vgadev->decodes & (VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM)) vga_decode_count--; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index a3cd8ca..7dd9f2b 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "pci.h" static int sysfs_initialized; /* = 0 */ @@ -414,6 +415,10 @@ static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *vga_dev = vga_default_device(); + + if (vga_dev) + return sprintf(buf, "%u\n", (pdev == vga_dev)); return sprintf(buf, "%u\n", !!(pdev->resource[PCI_ROM_RESOURCE].flags & diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h index 9c3120d..759a25b 100644 --- a/include/linux/vgaarb.h +++ b/include/linux/vgaarb.h @@ -31,6 +31,7 @@ #ifndef LINUX_VGA_H #define LINUX_VGA_H +#include