aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2015-04-14 04:19:51 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-30 12:11:40 -0300
commit7195f61b801104add6453e1d8a39d5c8366fc446 (patch)
tree2ff6a537e4710fc76d164dbb5765da328e8f5057
parentbaf06b519051047b4ca6bcaa94ee2d85672dd443 (diff)
downloadlinux-linaro-stable-7195f61b801104add6453e1d8a39d5c8366fc446.tar.gz
[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>
-rw-r--r--drivers/media/usb/uvc/uvc_queue.c12
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c13
-rw-r--r--drivers/media/usb/uvc/uvcvideo.h2
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 87a19f33e460..f16b9b42689d 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 c4b1ac6750d8..69d01803e0aa 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 1b594c203992..ead00a83df04 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,