From 7195f61b801104add6453e1d8a39d5c8366fc446 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 14 Apr 2015 04:19:51 -0300 Subject: [PATCH] [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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/uvc/uvc_queue.c | 12 ++++++++++++ drivers/media/usb/uvc/uvc_v4l2.c | 13 +++++++++++++ drivers/media/usb/uvc/uvcvideo.h | 2 ++ 3 files changed, 27 insertions(+) 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, -- 2.20.1