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| author | Mario Limonciello <mario.limonciello@amd.com> | 2025-07-17 20:38:04 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-07-17 23:30:05 +0300 |
| commit | 76720eed7d18baf51c0f31fe8a3784702f50e3fc (patch) | |
| tree | 9c03aa6ae6656c1c0210f08208020a34ece4ec84 /include/linux | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
| download | linux-76720eed7d18baf51c0f31fe8a3784702f50e3fc.tar.xz | |
PCI: Add pci_is_display() to check if device is a display controller
Several places in the kernel do class shifting to match whether a PCI
device is display class. Add pci_is_display() for those places to use.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Daniel Dadap <ddadap@nvidia.com>
Reviewed-by: Simona Vetter <simona.vetter@ffwll.ch>
Link: https://patch.msgid.link/20250717173812.3633478-2-superm1@kernel.org
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci.h | 15 |
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 |