git: 8558dd61e674 - main - linuxkpi: add pci_is_vga()

The branch main has been updated by wulf:

URL: https://cgit.FreeBSD.org/src/commit/?id=8558dd61e6747fef424ef924b19f4095072fc2f3

commit 8558dd61e6747fef424ef924b19f4095072fc2f3
Author:     Denis Borovikov <denis.borovikov@gmail.com>
AuthorDate: 2026-10-17 19:55:17 +0000
Commit:     Vladimir Kondratyev <wulf@FreeBSD.org>
CommitDate: 2026-10-17 19:55:17 +0000

    linuxkpi: add pci_is_vga()
    
    Returns true for a VGA-compatible display controller and for the
    pre-PCI 2.0 VGA class (base 0x00, subclass 0x01), as Linux's
    pci_is_vga() does. Used by drm/virtio to decide whether to remove
    the firmware framebuffer on virtio-vga.
    
    Signed-off-by:  Denis Borovikov <denis.borovikov@gmail.com>
    Reviewed by:    wulf
    Differential Revision:  https://reviews.freebsd.org/D60200
---
 sys/compat/linuxkpi/common/include/linux/pci.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
index b46bb99612c8..a68fd6b13254 100644
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -408,6 +408,17 @@ pci_dev_id(struct pci_dev *pdev)
 	return (PCI_DEVID(pdev->bus->number, pdev->devfn));
 }
 
+static inline bool
+pci_is_vga(struct pci_dev *pdev)
+{
+	/* pdev->class holds only the base class. */
+	uint8_t class = pci_get_class(pdev->dev.bsddev);
+	uint8_t subclass  = pci_get_subclass(pdev->dev.bsddev);
+
+	return ((class == PCIC_DISPLAY && subclass == PCIS_DISPLAY_VGA) ||
+	    (class == PCIC_OLD && subclass == PCIS_OLD_VGA));
+}
+
 static inline int
 pci_resource_type(struct pci_dev *pdev, int bar)
 {