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

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Date:   Wed, 10 Feb 2021 11:28:20 +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>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Johan Hovold <johan@...nel.org>,
        Kars Mulder <kerneldev@...smulder.nl>,
        Jonathan Cox <jonathan@...ox.net>,
        Tomasz Meresiński <tomasz@...esinski.eu>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] 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 f232914de5fd..f888deaf7bab 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -480,6 +480,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* novation SoundControl XL */
 	{ USB_DEVICE(0x1235, 0x0061), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* ELMO L-12F document camera */
+	{ USB_DEVICE(0x09a1, 0x0028), .driver_info = USB_QUIRK_DELAY_CTRL_MSG },
+
 	{ }  /* terminating entry must be last */
 };
 
-- 
2.17.1