linux-kernel - [PATCH v3] media: ucvideo: Add quirk for Logitech Rally Bar

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Message-Id: <20240102-rallybar-v3-1-0ab197ce4aa2@chromium.org>
Date: Tue, 02 Jan 2024 14:38:45 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Alan Stern <stern@...land.harvard.edu>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-media@...r.kernel.org, stable@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v3] media: ucvideo: Add quirk for Logitech Rally Bar

Logitech Rally Bar devices, despite behaving as UVC cameras, have a
different power management system that the other cameras from Logitech.

USB_QUIRK_RESET_RESUME is applied to all the UVC cameras from Logitech
at the usb core. Unfortunately, USB_QUIRK_RESET_RESUME causes undesired
USB disconnects, that make them completely unusable.

Instead of creating a list for this family of devices in the core, let's
create a quirk in the UVC driver.

Fixes: e387ef5c47dd ("usb: Add USB_QUIRK_RESET_RESUME for all Logitech UVC webcams")
Cc: stable@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
Tested with a Rallybar Mini with an Acer Chromebook Spin 513
---
Changes in v3:
- Move quirk to uvc driver
- Link to v2: https://lore.kernel.org/r/20231222-rallybar-v2-1-5849d62a9514@chromium.org

Changes in v2:
- Add Fixes tag
- Add UVC maintainer as Cc
- Link to v1: https://lore.kernel.org/r/20231222-rallybar-v1-1-82b2a4d3106f@chromium.org
---
 drivers/media/usb/uvc/uvc_driver.c | 21 +++++++++++++++++++++
 drivers/media/usb/uvc/uvcvideo.h   |  1 +
 2 files changed, 22 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 08fcd2ffa727..77c1932c29ca 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
+#include <linux/usb/quirks.h>
 #include <linux/usb/uvc.h>
 #include <linux/videodev2.h>
 #include <linux/vmalloc.h>
@@ -2233,6 +2234,8 @@ static int uvc_probe(struct usb_interface *intf,
 	}
 
 	uvc_dbg(dev, PROBE, "UVC device initialized\n");
+	if (dev->quirks & UVC_QUIRK_FORCE_RESUME)
+		udev->quirks &= ~USB_QUIRK_RESET_RESUME;
 	usb_enable_autosuspend(udev);
 	return 0;
 
@@ -2574,6 +2577,24 @@ static const struct usb_device_id uvc_ids[] = {
 	  .bInterfaceSubClass	= 1,
 	  .bInterfaceProtocol	= 0,
 	  .driver_info		= UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
+	/* Logitech Rally Bar */
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
+				| USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor		= 0x046d,
+	  .idProduct		= 0x089b,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= UVC_INFO_QUIRK(UVC_QUIRK_FORCE_RESUME) },
+	/* Logitech Rally Bar */
+	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
+				| USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor		= 0x046d,
+	  .idProduct		= 0x08d3,
+	  .bInterfaceClass	= USB_CLASS_VIDEO,
+	  .bInterfaceSubClass	= 1,
+	  .bInterfaceProtocol	= 0,
+	  .driver_info		= UVC_INFO_QUIRK(UVC_QUIRK_FORCE_RESUME) },
 	/* Chicony CNF7129 (Asus EEE 100HE) */
 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
 				| USB_DEVICE_ID_MATCH_INT_INFO,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 6fb0a78b1b00..fa59a21d2a28 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -73,6 +73,7 @@
 #define UVC_QUIRK_FORCE_Y8		0x00000800
 #define UVC_QUIRK_FORCE_BPP		0x00001000
 #define UVC_QUIRK_WAKE_AUTOSUSPEND	0x00002000
+#define UVC_QUIRK_FORCE_RESUME		0x00004000
 
 /* Format flags */
 #define UVC_FMT_FLAG_COMPRESSED		0x00000001

---
base-commit: c0f65a7c112b3cfa691cead54bcf24d6cc2182b5
change-id: 20231222-rallybar-19ce0c64d5e6

Best regards,
-- 
Ricardo Ribalda <ribalda@...omium.org>