Hi Ricardo,
Thank you for the patch.
On Tue, Apr 02, 2024 at 12:09:29PM +0000, Ricardo Ribalda wrote:
> 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 in the Rally Bar that make them completely unusable.
>
> There is an open discussion about if we should fix this in the core or
> add a quirk in the UVC driver. In order to enable this hardware, let's
> land this patch first, and we can revert it later if there is a
> different conclusion.
>
> Fixes: e387ef5c47dd ("usb: Add USB_QUIRK_RESET_RESUME for all Logitech UVC webcams")
> Cc: <stable@xxxxxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Cc: Oliver Neukum <oneukum@xxxxxxxx>
> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Devinder Khroad <dkhroad@xxxxxxxxxxxx>
> Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> ---
> Tested with a Rallybar Mini with an Acer Chromebook Spin 513
> ---
> Changes in v5:
> - Update commit message to describe that this is a temp solution.
> - Link to v4: https://lore.kernel.org/r/20240108-rallybar-v4-1-a7450641e41b@xxxxxxxxxxxx
>
> Changes in v4:
> - Include Logi Rally Bar Huddle (Thanks Kyle!)
> - Link to v3: https://lore.kernel.org/r/20240102-rallybar-v3-1-0ab197ce4aa2@xxxxxxxxxxxx
>
> Changes in v3:
> - Move quirk to uvc driver
> - Link to v2: https://lore.kernel.org/r/20231222-rallybar-v2-1-5849d62a9514@xxxxxxxxxxxx
>
> Changes in v2:
> - Add Fixes tag
> - Add UVC maintainer as Cc
> - Link to v1: https://lore.kernel.org/r/20231222-rallybar-v1-1-82b2a4d3106f@xxxxxxxxxxxx
> ---
> drivers/media/usb/uvc/uvc_driver.c | 30 ++++++++++++++++++++++++++++++
> drivers/media/usb/uvc/uvcvideo.h | 1 +
> 2 files changed, 31 insertions(+)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 08fcd2ffa727b..9663bcac68438 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)
The quirk isn't really about forcing resume, but about not resetting on
resume. Can we name it UVC_QUIRK_NO_RESET_RESUME ?
> + udev->quirks &= ~USB_QUIRK_RESET_RESUME;
Let's move this before the uvc_dbg().
With that, the patch looks good to me. I can apply those changes
locally if you don't want to submit a v6.
> usb_enable_autosuspend(udev);
> return 0;
>
> @@ -2574,6 +2577,33 @@ 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 Huddle */
> + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> + | USB_DEVICE_ID_MATCH_INT_INFO,
> + .idVendor = 0x046d,
> + .idProduct = 0x087c,
> + .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 = 0x089b,
> + .bInterfaceClass = USB_CLASS_VIDEO,
> + .bInterfaceSubClass = 1,
> + .bInterfaceProtocol = 0,
> + .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_RESUME) },
> + /* Logitech Rally Bar Mini */
> + { .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 6fb0a78b1b009..fa59a21d2a289 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
--
Regards,
Laurent Pinchart
