media: vb2: videobuf -> videobuf2

It is confusing to use the term 'videobuf' or 'video-buf' since that
usually refers to the old videobuf version 1 framework. Rename to
'videobuf2' or vb2.

Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/common/videobuf2/videobuf2-core.c

···
 }
 
 /*
- * __vb2_queue_alloc() - allocate videobuf buffer structures and (for MMAP type)
+ * __vb2_queue_alloc() - allocate vb2 buffer structures and (for MMAP type)
  * video buffer memory for all buffers/planes on the queue and initializes the
  * queue
  *
···
 			    VB2_MAX_FRAME - q->num_buffers);
 
 	for (buffer = 0; buffer < num_buffers; ++buffer) {
-		/* Allocate videobuf buffer structures */
+		/* Allocate vb2 buffer structures */
 		vb = kzalloc(q->buf_struct_size, GFP_KERNEL);
 		if (!vb) {
 			dprintk(q, 1, "memory alloc for buffer struct failed\n");
···
 	}
 #endif
 
-	/* Free videobuf buffers */
+	/* Free vb2 buffers */
 	for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
 	     ++buffer) {
 		kfree(q->bufs[buffer]);
···
 	if (pb)
 		call_void_bufop(q, fill_user_buffer, vb, pb);
 
-	/* Remove from videobuf queue */
+	/* Remove from vb2 queue */
 	list_del(&vb->queued_entry);
 	q->queued_count--;
 
···
  * __vb2_queue_cancel() - cancel and stop (pause) streaming
  *
  * Removes all queued buffers from driver's queue and all buffers queued by
- * userspace from videobuf's queue. Returns to state after reqbufs.
+ * userspace from vb2's queue. Returns to state after reqbufs.
  */
 static void __vb2_queue_cancel(struct vb2_queue *q)
 {
···
 	q->uses_qbuf = 0;
 
 	/*
-	 * Remove all buffers from videobuf's list...
+	 * Remove all buffers from vb2's list...
 	 */
 	INIT_LIST_HEAD(&q->queued_list);
 	/*
···
 
 	/*
 	 * Cancel will pause streaming and remove all buffers from the driver
-	 * and videobuf, effectively returning control over them to userspace.
+	 * and vb2, effectively returning control over them to userspace.
 	 *
 	 * Note that we do this even if q->streaming == 0: if you prepare or
 	 * queue buffers, and then call streamoff without ever having called

drivers/media/common/videobuf2/videobuf2-dvb.c

···
  *
  * some helper function for simple DVB cards which simply DMA the
  * complete transport stream and let the computer sort everything else
- * (i.e. we are using the software demux, ...).  Also uses the
- * video-buf to manage DMA buffers.
+ * (i.e. we are using the software demux, ...).  Also uses vb2
+ * to manage DMA buffers.
  *
  * (c) 2004 Gerd Knorr <[e-mail]> [SUSE Labs]
  */

drivers/media/common/videobuf2/videobuf2-v4l2.c

···
 		/*
 		 * Single-planar buffers do not use planes array,
 		 * so fill in relevant v4l2_buffer struct fields instead.
-		 * In videobuf we use our internal V4l2_planes struct for
+		 * In vb2 we use our internal V4l2_planes struct for
 		 * single-planar buffers as well, for simplicity.
 		 *
 		 * If bytesused == 0 for the output buffer, then fall back
···
 
 /*
  * vb2_querybuf() - query video buffer information
- * @q:		videobuf queue
+ * @q:		vb2 queue
  * @b:		buffer struct passed from userspace to vidioc_querybuf handler
  *		in driver
  *

include/media/videobuf2-core.h

···
  *		 DMABUF memory types.
  * @get_userptr: acquire userspace memory for a hardware operation; used for
  *		 USERPTR memory types; vaddr is the address passed to the
- *		 videobuf layer when queuing a video buffer of USERPTR type;
+ *		 videobuf2 layer when queuing a video buffer of USERPTR type;
  *		 should return an allocator private per-buffer structure
  *		 associated with the buffer on success, ERR_PTR() on failure;
  *		 the returned private structure will then be passed as @buf_priv
···
  *		associated with the passed private structure or NULL if not
  *		available.
  * @num_users:	return the current number of users of a memory buffer;
- *		return 1 if the videobuf layer (or actually the driver using
+ *		return 1 if the videobuf2 layer (or actually the driver using
  *		it) is the only user.
  * @mmap:	setup a userspace mapping for a given memory buffer under
  *		the provided virtual memory region.
···
  * enum vb2_buffer_state - current video buffer state.
  * @VB2_BUF_STATE_DEQUEUED:	buffer under userspace control.
  * @VB2_BUF_STATE_IN_REQUEST:	buffer is queued in media request.
- * @VB2_BUF_STATE_PREPARING:	buffer is being prepared in videobuf.
- * @VB2_BUF_STATE_QUEUED:	buffer queued in videobuf, but not in driver.
+ * @VB2_BUF_STATE_PREPARING:	buffer is being prepared in videobuf2.
+ * @VB2_BUF_STATE_QUEUED:	buffer queued in videobuf2, but not in driver.
  * @VB2_BUF_STATE_ACTIVE:	buffer queued in driver and possibly used
  *				in a hardware operation.
- * @VB2_BUF_STATE_DONE:		buffer returned from driver to videobuf, but
+ * @VB2_BUF_STATE_DONE:		buffer returned from driver to videobuf2, but
  *				not yet dequeued to userspace.
  * @VB2_BUF_STATE_ERROR:	same as above, but the operation on the buffer
  *				has ended with an error, which will be reported
···
 };
 
 /**
- * struct vb2_queue - a videobuf queue.
+ * struct vb2_queue - a videobuf2 queue.
  *
  * @type:	private buffer type whose content is defined by the vb2-core
  *		caller. For example, for V4L2, it should match
···
  * @mmap_lock:	private mutex used when buffers are allocated/freed/mmapped
  * @memory:	current memory type used
  * @dma_dir:	DMA mapping direction.
- * @bufs:	videobuf buffer structures
+ * @bufs:	videobuf2 buffer structures
  * @num_buffers: number of allocated/used buffers
  * @queued_list: list of buffers currently queued from userspace
  * @queued_count: number of buffers queued and ready for streaming.
···
 void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no);
 
 /**
- * vb2_buffer_done() - inform videobuf that an operation on a buffer
+ * vb2_buffer_done() - inform videobuf2 that an operation on a buffer
  *	is finished.
  * @vb:		pointer to &struct vb2_buffer to be used.
  * @state:	state of the buffer, as defined by &enum vb2_buffer_state.

include/media/videobuf2-dvb.h

···
 	struct dvb_frontend	*frontend;
 	struct vb2_queue	dvbq;
 
-	/* video-buf-dvb state info */
+	/* vb2-dvb state info */
 	struct mutex		lock;
 	int			nfeeds;