linux-kernel - Re: [PATCH v4 3/3] media: uvcvideo: Add a unique suffix to camera names

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Date:   Mon, 5 Dec 2022 14:04:54 +0900
From:   Yunke Cao <yunkec@...omium.org>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/3] media: uvcvideo: Add a unique suffix to camera names

On Sat, Dec 3, 2022 at 2:08 AM Ricardo Ribalda <ribalda@...omium.org> wrote:
>
> Some cameras have multiple data inputs (i.e. IR sensor and RGB sensor),
> append a unique number to the device name.
>
> Fixes v4l2-compliance:
>     Media Controller ioctls:
>          fail: v4l2-test-media.cpp(205): v2_entity_names_set.find(key) != v2_entity_names_set.end()
>        test MEDIA_IOC_G_TOPOLOGY: FAIL
>          fail: v4l2-test-media.cpp(394): num_data_links != num_links
>        test MEDIA_IOC_ENUM_ENTITIES/LINKS: FAIL
>
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  drivers/media/usb/uvc/uvc_driver.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 215fb483efb0..f4032ebb3689 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -1963,7 +1963,8 @@ int uvc_register_video_device(struct uvc_device *dev,
>                 break;
>         }
>
> -       strscpy(vdev->name, dev->name, sizeof(vdev->name));
> +       snprintf(vdev->name, sizeof(vdev->name), "%s %u", dev->name,
> +                stream->header.bTerminalLink);
>
>         /*
>          * Set the driver data before calling video_register_device, otherwise
>
> --
> 2.39.0.rc0.267.gcb52ba06e7-goog-b4-0.11.0-dev-696ae

Reviewed-by: Yunke Cao <yunkec@...omium.org>