PCI: Add quirk for Intersil/Techwell TW686[4589] AV capture cards (3657cebd) · Commits · 戴 / test

drivers/pci/quirks.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -3663,6 +3663,28 @@ DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias);
		/* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */
		DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);

		/*
		* Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
		* class code. Fix it.
		*/
		static void quirk_tw686x_class(struct pci_dev *pdev)
		{
		u32 class = pdev->class;

		/* Use "Multimedia controller" class */
		pdev->class = (PCI_CLASS_MULTIMEDIA_OTHER << 8) \| 0x01;
		dev_info(&pdev->dev, "TW686x PCI class overridden (%#08x -> %#08x)\n",
		class, pdev->class);
		}
		DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6864, PCI_CLASS_NOT_DEFINED, 0,
		quirk_tw686x_class);
		DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6865, PCI_CLASS_NOT_DEFINED, 0,
		quirk_tw686x_class);
		DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6868, PCI_CLASS_NOT_DEFINED, 0,
		quirk_tw686x_class);
		DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6869, PCI_CLASS_NOT_DEFINED, 0,
		quirk_tw686x_class);

		/*
		* AMD has indicated that the devices below do not support peer-to-peer
		* in any system where they are found in the southbridge with an AMD