From: Mario Limonciello <mario.limoncie...@amd.com> Several places in the kernel do class shifting to match whether a PCI device is display class. Introduce a helper for those places to use.
Acked-by: Bjorn Helgaas <bhelg...@google.com> Reviewed-by: Daniel Dadap <dda...@nvidia.com> Reviewed-by: Simona Vetter <simona.vet...@ffwll.ch> Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com> --- include/linux/pci.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/pci.h b/include/linux/pci.h index 05e68f35f3923..e77754e43c629 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 a PCI device is a display controller + * @pdev: Pointer to the PCI device structure + * + * This function determines 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 -- 2.43.0