[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, 8 deletions

diff --git a/drivers/media/pci/cobalt/cobalt-v4l2.c b/drivers/media/pci/cobalt/cobalt-v4l2.c
index 8cc78c522ac9..c0ba458f6cf3 100644
--- a/drivers/media/pci/cobalt/cobalt-v4l2.c
+++ b/drivers/media/pci/cobalt/cobalt-v4l2.c
@@ -43,11 +43,10 @@ static const struct v4l2_dv_timings cea1080p60 = V4L2_DV_BT_CEA_1920X1080P60;
 
 /* vb2 DMA streaming ops */
 
-static int cobalt_queue_setup(struct vb2_queue *q, const void *parg,
+static int cobalt_queue_setup(struct vb2_queue *q,
 			unsigned int *num_buffers, unsigned int *num_planes,
 			unsigned int sizes[], void *alloc_ctxs[])
 {
-	const struct v4l2_format *fmt = parg;
 	struct cobalt_stream *s = q->drv_priv;
 	unsigned size = s->stride * s->height;
 
@@ -55,14 +54,11 @@ static int cobalt_queue_setup(struct vb2_queue *q, const void *parg,
 		*num_buffers = 3;
 	if (*num_buffers > NR_BUFS)
 		*num_buffers = NR_BUFS;
+	alloc_ctxs[0] = s->cobalt->alloc_ctx;
+	if (*num_planes)
+		return sizes[0] < size ? -EINVAL : 0;
 	*num_planes = 1;
-	if (fmt) {
-		if (fmt->fmt.pix.sizeimage < size)
-			return -EINVAL;
-		size = fmt->fmt.pix.sizeimage;
-	}
 	sizes[0] = size;
-	alloc_ctxs[0] = s->cobalt->alloc_ctx;
 	return 0;
 }