Re: [PATCH v5 3/3] media: uvcvideo: add quirks for Razer Kiyo Pro webcam

Jeffrey Hein
2026-04-09T07:39:10Z

Hi Ricardo,

On Thu, 9 Apr 2026 at 08:49, Ricardo Ribalda <ribalda@chromium.org> wrote:
> When we add a quirk to the list we include the output of `lsusb -v -d
> 1532:` to the commit message. Please add it to your next version.

Added the Device Descriptor section from lsusb -v to the v6 commit
message for patch 2/2.

Thanks,
JP

On Wed, Apr 8, 2026 at 11:50 PM Ricardo Ribalda <ribalda@chromium.org> wrote:
>
> Hi JP
>
> When we add a quirk to the list we include the output of `lsusb -v -d
> 1532:` to the commit message. Please add it to your next version.
>
> Thanks!
>
> On Tue, 31 Mar 2026 at 02:38, JP Hein <jp@jphein.com> wrote:
> >
> > The Razer Kiyo Pro (1532:0e05) is a USB 3.0 webcam whose firmware has
> > two failure modes that cascade into full xHCI host controller death,
> > disconnecting every USB device on the bus:
> >
> > 1. LPM/autosuspend resume: the device fails to reinitialize its UVC
> > endpoints on resume, producing EPIPE on SET_CUR. The stalled
> > endpoint triggers an xHCI stop-endpoint timeout.
> >
> > 2. Rapid control transfers: sustained rapid SET_CUR operations
> > (hundreds over several seconds) overwhelm the firmware.
> >
> > Add the device to the UVC driver table with:
> >
> > - UVC_QUIRK_CTRL_THROTTLE: rate-limit SET_CUR (50ms interval) and
> > skip error-code queries after EPIPE to prevent crash trigger #2.
> >
> > - UVC_QUIRK_DISABLE_AUTOSUSPEND: prevent USB autosuspend transitions
> > that trigger crash #1. Same approach as Insta360 Link.
> >
> > - UVC_QUIRK_NO_RESET_RESUME: avoid the fragile reset-during-resume
> > path. Same approach as Logitech Rally Bar.
> >
> > Cc: stable@vger.kernel.org
> > Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2061177
> > Signed-off-by: JP Hein <jp@jphein.com>
> > ---
> > drivers/media/usb/uvc/uvc_driver.c | 17 +++++++++++++++++
> > 1 file changed, 17 insertions(+)
> >
> > diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> > index b0ca81d92..e8b4de942 100644
> > --- a/drivers/media/usb/uvc/uvc_driver.c
> > +++ b/drivers/media/usb/uvc/uvc_driver.c
> > @@ -2920,6 +2920,23 @@ static const struct usb_device_id uvc_ids[] = {
> > .bInterfaceSubClass = 1,
> > .bInterfaceProtocol = 0,
> > .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
> > +
> > + /*
> > + * Razer Kiyo Pro -- firmware crashes under rapid control transfers
> > + * and on LPM/autosuspend resume, cascading into xHCI controller
> > + * death that disconnects all USB devices on the bus.
> > + */
> > + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> > + | USB_DEVICE_ID_MATCH_INT_INFO,
> > + .idVendor = 0x1532,
> > + .idProduct = 0x0e05,
> > + .bInterfaceClass = USB_CLASS_VIDEO,
> > + .bInterfaceSubClass = 1,
> > + .bInterfaceProtocol = 0,
> > + .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_CTRL_THROTTLE
> > + | UVC_QUIRK_DISABLE_AUTOSUSPEND
> > + | UVC_QUIRK_NO_RESET_RESUME) },
> > +
> > /* Kurokesu C1 PRO */
> > { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> > | USB_DEVICE_ID_MATCH_INT_INFO,
> > --
> > 2.43.0
> >
>
>
> --
> Ricardo Ribalda

--
Jeffrey Pine Hein
Just plain helpful.
jphein.com ☀️ techempower.org
(530) 798-4099