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PCI: Prevent xHCI driver from claiming AMD VanGogh USB3 DRD device 

The AMD VanGogh SoC contains a DesignWare USB3 Dual-Role Device that can be
operated as either a USB Host or a USB Device, similar to on the AMD Nolan
platform.

be6646bfba ("PCI: Prevent xHCI driver from claiming AMD Nolan USB3 DRD
device") added a quirk to let the dwc3 driver claim the Nolan device since
it provides more specific support.

Extend that quirk to include the VanGogh SoC USB3 device.

Link: https://lore.kernel.org/r/20230927202212.2388216-1-vi@endrift.com
Signed-off-by: Vicki Pfau <vi@endrift.com>
[bhelgaas: include be6646bfba reference, add stable tag]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org	# v3.19+
This commit is contained in:
Vicki Pfau 2023-09-27 13:22:12 -07:00 committed by Bjorn Helgaas
parent 0bb80ecc33
commit 7e6f3b6d2c
2 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pci/quirks.c
View File

@ -690,7 +690,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_
/*
* In the AMD NL platform, this device ([1022:7912]) has a class code of
* PCI_CLASS_SERIAL_USB_XHCI (0x0c0330), which means the xhci driver will
* claim it.
* claim it. The same applies on the VanGogh platform device ([1022:163a]).
*
* But the dwc3 driver is a more specific driver for this device, and we'd
* prefer to use it instead of xhci. To prevent xhci from claiming the
@ -698,7 +698,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_
* defines as "USB device (not host controller)". The dwc3 driver can then
* claim it based on its Vendor and Device ID.
*/
static void quirk_amd_nl_class(struct pci_dev *pdev)
static void quirk_amd_dwc_class(struct pci_dev *pdev)
{
u32 class = pdev->class;
@ -708,7 +708,9 @@ static void quirk_amd_nl_class(struct pci_dev *pdev)
class, pdev->class);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,
quirk_amd_nl_class);
quirk_amd_dwc_class);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VANGOGH_USB,
quirk_amd_dwc_class);
/*
* Synopsys USB 3.x host HAPS platform has a class code of

1
include/linux/pci_ids.h
View File

@ -579,6 +579,7 @@
#define PCI_DEVICE_ID_AMD_1AH_M00H_DF_F3 0x12c3
#define PCI_DEVICE_ID_AMD_1AH_M20H_DF_F3 0x16fb
#define PCI_DEVICE_ID_AMD_MI200_DF_F3 0x14d3
#define PCI_DEVICE_ID_AMD_VANGOGH_USB 0x163a
#define PCI_DEVICE_ID_AMD_CNB17H_F3 0x1703
#define PCI_DEVICE_ID_AMD_LANCE 0x2000
#define PCI_DEVICE_ID_AMD_LANCE_HOME 0x2001