[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>

drivers/media/platform/rcar_jpu.c

@@ -1015,28 +1015,33 @@ error_free:
  * ============================================================================
  */
 static int jpu_queue_setup(struct vb2_queue *vq,
-			   const void *parg,
 			   unsigned int *nbuffers, unsigned int *nplanes,
 			   unsigned int sizes[], void *alloc_ctxs[])
 {
-	const struct v4l2_format *fmt = parg;
 	struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
 	struct jpu_q_data *q_data;
 	unsigned int i;
 
 	q_data = jpu_get_q_data(ctx, vq->type);
 
+	if (*nplanes) {
+		if (*nplanes != q_data->format.num_planes)
+			return -EINVAL;
+
+		for (i = 0; i < *nplanes; i++) {
+			unsigned int q_size = q_data->format.plane_fmt[i].sizeimage;
+
+			if (sizes[i] < q_size)
+				return -EINVAL;
+			alloc_ctxs[i] = ctx->jpu->alloc_ctx;
+		}
+		return 0;
+	}
+
 	*nplanes = q_data->format.num_planes;
 
 	for (i = 0; i < *nplanes; i++) {
-		unsigned int q_size = q_data->format.plane_fmt[i].sizeimage;
-		unsigned int f_size = fmt ?
-			fmt->fmt.pix_mp.plane_fmt[i].sizeimage : 0;
-
-		if (fmt && f_size < q_size)
-			return -EINVAL;
-
-		sizes[i] = fmt ? f_size : q_size;
+		sizes[i] = q_data->format.plane_fmt[i].sizeimage;
 		alloc_ctxs[i] = ctx->jpu->alloc_ctx;
 	}