[media] uvcvideo: Set device_caps in VIDIOC_QUERYCAP

Set the capabilities field to global capabilities, and the device_caps
field to the video node capabilities.
This issue was found by the v4l2-compliance tool.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 13 insertions, 4 deletions

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 5967081747ce..ae24f7d70b03 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1741,6 +1741,11 @@ static int uvc_register_video(struct uvc_device *dev,
                 return ret;
         }
 
+        if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
+        else
+                stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
+
         atomic_inc(&dev->nstreams);
         return 0;
 }
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 3bd93736a82a..b1aa55fb8984 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -565,12 +565,14 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
                 usb_make_path(stream->dev->udev,
                               cap->bus_info, sizeof(cap->bus_info));
                 cap->version = LINUX_VERSION_CODE;
+                cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
+                                  | chain->caps;
                 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
-                        cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
-                                          | V4L2_CAP_STREAMING;
+                        cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
+                                         | V4L2_CAP_STREAMING;
                 else
-                        cap->capabilities = V4L2_CAP_VIDEO_OUTPUT
-                                          | V4L2_CAP_STREAMING;
+                        cap->device_caps = V4L2_CAP_VIDEO_OUTPUT
+                                         | V4L2_CAP_STREAMING;
                 break;
         }
 
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index d83b6baf703a..a6c561f631a0 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -371,6 +371,8 @@ struct uvc_video_chain {
         struct uvc_entity *selector;            /* Selector unit */
 
         struct mutex ctrl_mutex;                /* Protects ctrl.info */
+
+        u32 caps;                               /* V4L2 chain-wide caps */
 };
 
 struct uvc_stats_frame {