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Subject[PATCH v10 11/21] media: uvcvideo: Set unique vdev name based in type
Date
All the entities must have a unique name. We can have a descriptive and
unique name by appending the function and the entity->id.

This is even resilent to multi chain devices.

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@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
drivers/media/usb/uvc/uvc_driver.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 14b60792ffab..037bf80d1100 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2194,6 +2194,7 @@ int uvc_register_video_device(struct uvc_device *dev,
const struct v4l2_file_operations *fops,
const struct v4l2_ioctl_ops *ioctl_ops)
{
+ const char *name;
int ret;

/* Initialize the video buffers queue. */
@@ -2222,16 +2223,20 @@ int uvc_register_video_device(struct uvc_device *dev,
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
default:
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ name = "Video Capture";
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ name = "Video Output";
break;
case V4L2_BUF_TYPE_META_CAPTURE:
vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
+ name = "Metadata";
break;
}

- strscpy(vdev->name, dev->name, sizeof(vdev->name));
+ snprintf(vdev->name, sizeof(vdev->name), "%s %u", name,
+ stream->header.bTerminalLink);

/*
* Set the driver data before calling video_register_device, otherwise
--
2.32.0.288.g62a8d224e6-goog
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