PCI: Add quirk for Intersil/Techwell TW686[4589] AV capture cards

Intersil/Techwell TW686[4589]-based video capture cards have an empty
(zero) class code.  Fix it.

Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 1fd0ce8208d0bb199a754089cf822d77ee4cf1f1..1b9fc4ed39a34ce8059c5b9295e15ca2e76a8dc0 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -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