Commit 56132c8d authored by Nicolas Saenz Julienne's avatar Nicolas Saenz Julienne Committed by Greg Kroah-Hartman
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usb: host: pci-quirks: Bypass xHCI quirks for Raspberry Pi 4 



The board doesn't need the quirks to be run, and takes care of its own
initialization through a reset controller device. So let's bypass them.

Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629161845.6021-8-nsaenzjulienne@suse.de


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 83a06a10

drivers/usb/host/pci-quirks.c

+17 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/export.h>

#include <linux/acpi.h>

#include <linux/dmi.h>

#include <linux/of.h>



#include "pci-quirks.h"

#include "xhci-ext-caps.h"
@@ -1244,11 +1245,27 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev) 


static void quirk_usb_early_handoff(struct pci_dev *pdev)

{

	struct device_node *parent;

	bool is_rpi;



	/* Skip Netlogic mips SoC's internal PCI USB controller.

	 * This device does not need/support EHCI/OHCI handoff

	 */

	if (pdev->vendor == 0x184e)	/* vendor Netlogic */

		return;



	/*

	 * Bypass the Raspberry Pi 4 controller xHCI controller, things are

	 * taken care of by the board's co-processor.

	 */

	if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) {

		parent = of_get_parent(pdev->bus->dev.of_node);

		is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie");

		of_node_put(parent);

		if (is_rpi)

			return;

	}



	if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&

			pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&

			pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&