linux-kernel - [PATCH v2] usb: quirks: add quirk to start video capture on ELMO L-12F document camera reliable

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Message-Id: <20210210115144.17014-1-stefan.ursella@wolfvision.net>
Date:   Wed, 10 Feb 2021 12:51:43 +0100
From:   Stefan Ursella <stefan.ursella@...fvision.net>
To:     unlisted-recipients:; (no To-header on input)
Cc:     stefan.ursella@...fvision.net,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Kars Mulder <kerneldev@...smulder.nl>,
        Tomasz Meresiński <tomasz@...esinski.eu>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] usb: quirks: add quirk to start video capture on ELMO L-12F document camera reliable

Without this quirk starting a video capture from the device often fails with

kernel: uvcvideo: Failed to set UVC probe control : -110 (exp. 34).

Signed-off-by: Stefan Ursella <stefan.ursella@...fvision.net>
---
 drivers/usb/core/quirks.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 84b5da0a26a5..270ad082d3ba 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -381,6 +381,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* X-Rite/Gretag-Macbeth Eye-One Pro display colorimeter */
 	{ USB_DEVICE(0x0971, 0x2000), .driver_info = USB_QUIRK_NO_SET_INTF },
 
+	/* ELMO L-12F document camera */
+	{ USB_DEVICE(0x09a1, 0x0028), .driver_info = USB_QUIRK_DELAY_CTRL_MSG },
+
 	/* Broadcom BCM92035DGROM BT dongle */
 	{ USB_DEVICE(0x0a5c, 0x2021), .driver_info = USB_QUIRK_RESET_RESUME },
 
-- 
2.17.1