[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, 5 insertions, 6 deletions

diff --git a/drivers/media/pci/dt3155/dt3155.c b/drivers/media/pci/dt3155/dt3155.c
index d84abde5ea29..f09bd73bd16f 100644
--- a/drivers/media/pci/dt3155/dt3155.c
+++ b/drivers/media/pci/dt3155/dt3155.c
@@ -131,22 +131,21 @@ static int wait_i2c_reg(void __iomem *addr)
 }
 
 static int
-dt3155_queue_setup(struct vb2_queue *vq, const void *parg,
+dt3155_queue_setup(struct vb2_queue *vq,
 		unsigned int *nbuffers, unsigned int *num_planes,
 		unsigned int sizes[], void *alloc_ctxs[])
 
 {
-	const struct v4l2_format *fmt = parg;
 	struct dt3155_priv *pd = vb2_get_drv_priv(vq);
 	unsigned size = pd->width * pd->height;
 
 	if (vq->num_buffers + *nbuffers < 2)
 		*nbuffers = 2 - vq->num_buffers;
-	if (fmt && fmt->fmt.pix.sizeimage < size)
-		return -EINVAL;
-	*num_planes = 1;
-	sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
 	alloc_ctxs[0] = pd->alloc_ctx;
+	if (*num_planes)
+		return sizes[0] < size ? -EINVAL : 0;
+	*num_planes = 1;
+	sizes[0] = size;
 	return 0;
 }