Merge branch 'pci/boot-display'

- Add pci_is_display() to check for "Display" base class and use it in
  ALSA hda, vfio, vga_switcheroo, vt-d (Mario Limonciello)

* pci/boot-display:
  ALSA: hda: Use pci_is_display()
  iommu/vt-d: Use pci_is_display()
  vga_switcheroo: Use pci_is_display()
  vfio/pci: Use pci_is_display()
  PCI: Add pci_is_display() to check if device is a display controller

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 05e68f35f392..4fff6405a830 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -744,6 +744,21 @@ static inline bool pci_is_vga(struct pci_dev *pdev)
 	return false;
 }
 
+/**
+ * pci_is_display - check if the PCI device is a display controller
+ * @pdev: PCI device
+ *
+ * Determine whether the given PCI device corresponds to a display
+ * controller. Display controllers are typically used for graphical output
+ * and are identified based on their class code.
+ *
+ * Return: true if the PCI device is a display controller, false otherwise.
+ */
+static inline bool pci_is_display(struct pci_dev *pdev)
+{
+	return (pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY;
+}
+
 #define for_each_pci_bridge(dev, bus)				\
 	list_for_each_entry(dev, &bus->devices, bus_list)	\
 		if (!pci_is_bridge(dev)) {} else