[media] vb2: drop v4l2_format argument from queue_setup

The queue_setup callback has a void pointer that is just for V4L2
and is the pointer to the v4l2_format struct that was passed to
VIDIOC_CREATE_BUFS. The idea was that drivers would use the information
from that struct to buffers suitable for the requested format.

After the vb2 split series this pointer is now a void pointer,
which is ugly, and the reality is that all existing drivers will
effectively just look at the sizeimage field of v4l2_format.

To make this more generic the queue_setup callback is changed:
the void pointer is dropped, instead if the *num_planes argument
is 0, then use the current format size, if it is non-zero, then
it contains the number of requested planes and the sizes array
contains the requested sizes. If either is unsupported, then return
-EINVAL, otherwise use the requested size(s).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
index e645c9df2d94..05cbd2f4b445 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -599,19 +599,18 @@ static struct v4l2_file_operations usbtv_fops = {
 };
 
 static int usbtv_queue_setup(struct vb2_queue *vq,
-	const void *parg, unsigned int *nbuffers,
+	unsigned int *nbuffers,
 	unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 {
-	const struct v4l2_format *fmt = parg;
 	struct usbtv *usbtv = vb2_get_drv_priv(vq);
 	unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
 
 	if (vq->num_buffers + *nbuffers < 2)
 		*nbuffers = 2 - vq->num_buffers;
+	if (*nplanes)
+		return sizes[0] < size ? -EINVAL : 0;
 	*nplanes = 1;
-	if (fmt && fmt->fmt.pix.sizeimage < size)
-		return -EINVAL;
-	sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
+	sizes[0] = size;
 
 	return 0;
 }