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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2015-04-14 07:19:51 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-30 15:11:40 (GMT) |
| commit | 7195f61b801104add6453e1d8a39d5c8366fc446 (patch) | |
| tree | 2ff6a537e4710fc76d164dbb5765da328e8f5057 /drivers/media/usb/uvc | |
| parent | baf06b519051047b4ca6bcaa94ee2d85672dd443 (diff) | |
| download | linux-7195f61b801104add6453e1d8a39d5c8366fc446.tar.xz | |
[media] uvcvideo: Implement DMABUF exporter role
Now that videobuf2-vmalloc supports exporting buffers, add support for
the DMABUF exporter role by plugging in the videobuf2 ioctl helper.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/usb/uvc')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_queue.c | 12 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvc_v4l2.c | 13 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvcvideo.h | 2 |
3 files changed, 27 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c index 87a19f3..f16b9b4 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -270,6 +270,18 @@ int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf) return ret; } +int uvc_export_buffer(struct uvc_video_queue *queue, + struct v4l2_exportbuffer *exp) +{ + int ret; + + mutex_lock(&queue->mutex); + ret = vb2_expbuf(&queue->queue, exp); + mutex_unlock(&queue->mutex); + + return ret; +} + int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf, int nonblocking) { diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index c4b1ac6..69d0180 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -723,6 +723,18 @@ static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) return uvc_queue_buffer(&stream->queue, buf); } +static int uvc_ioctl_expbuf(struct file *file, void *fh, + struct v4l2_exportbuffer *exp) +{ + struct uvc_fh *handle = fh; + struct uvc_streaming *stream = handle->stream; + + if (!uvc_has_privileges(handle)) + return -EBUSY; + + return uvc_export_buffer(&stream->queue, exp); +} + static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) { struct uvc_fh *handle = fh; @@ -1478,6 +1490,7 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = { .vidioc_reqbufs = uvc_ioctl_reqbufs, .vidioc_querybuf = uvc_ioctl_querybuf, .vidioc_qbuf = uvc_ioctl_qbuf, + .vidioc_expbuf = uvc_ioctl_expbuf, .vidioc_dqbuf = uvc_ioctl_dqbuf, .vidioc_create_bufs = uvc_ioctl_create_bufs, .vidioc_streamon = uvc_ioctl_streamon, diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 1b594c2..ead00a8 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -635,6 +635,8 @@ extern int uvc_create_buffers(struct uvc_video_queue *queue, struct v4l2_create_buffers *v4l2_cb); extern int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf); +extern int uvc_export_buffer(struct uvc_video_queue *queue, + struct v4l2_exportbuffer *exp); extern int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf, int nonblocking); extern int uvc_queue_streamon(struct uvc_video_queue *queue, |