linux-kernel - Re: [PATCH 7/9] usb: host: pci-quirks: Bypass xHCI quirks for Raspberry Pi 4

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Date:   Mon, 8 Jun 2020 12:50:58 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        f.fainelli@...il.com, gregkh@...uxfoundation.org, wahrenst@....net,
        robh@...nel.org, mathias.nyman@...ux.intel.com,
        Eric Anholt <eric@...olt.net>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-usb@...r.kernel.org,
        Mathias Nyman <mathias.nyman@...el.com>
Cc:     linux-kernel@...r.kernel.org, tim.gover@...pberrypi.org,
        helgaas@...nel.org, lorenzo.pieralisi@....com
Subject: Re: [PATCH 7/9] usb: host: pci-quirks: Bypass xHCI quirks for
 Raspberry Pi 4



On 6/8/2020 12:26 PM, Nicolas Saenz Julienne wrote:
> The board doesn't need the quirks to be run, and takes case of its own

(if you have to resubmit) takes care

> initialization trough a reset controller device. So let's bypass it

its quirk.

> quirk.
> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> ---
>  drivers/usb/host/pci-quirks.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
> index 92150ecdb036..4b3be05d1290 100644
> --- a/drivers/usb/host/pci-quirks.c
> +++ b/drivers/usb/host/pci-quirks.c
> @@ -16,6 +16,8 @@
>  #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"
>  
> @@ -1248,6 +1250,16 @@ static void quirk_usb_early_handoff(struct pci_dev *pdev)
>  	 */
>  	if (pdev->vendor == 0x184e)	/* vendor Netlogic */
>  		return;
> +
> +	/*
> +	 * Bypass the Raspberry Pi 4 controller xHCI controller, things are
> +	 * taken care by the board's co-processor.

taken care of by.

With that:

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

> +	 */
> +	if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483 &&
> +	    of_device_is_compatible(of_get_parent(pdev->bus->dev.of_node),
> +				    "brcm,bcm2711-pcie"))
> +		return;
> +
>  	if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
>  			pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
>  			pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
> 

-- 
Florian