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authorHans Verkuil <hans.verkuil@cisco.com>2015-10-28 03:50:37 +0100
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-12-18 16:48:19 +0100
commitdf9ecb0cad14b952a2865f8b3af86b2bbadfab45 (patch)
treea6a9501e8fc5a3a59e6e3fbf54e8e5c5559aaf23 /drivers/media/usb/usbtv
parent[media] cx23885: video instead of vbi register used (diff)
downloadlinux-df9ecb0cad14b952a2865f8b3af86b2bbadfab45.tar.xz
linux-df9ecb0cad14b952a2865f8b3af86b2bbadfab45.zip
[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>
Diffstat (limited to 'drivers/media/usb/usbtv')
-rw-r--r--drivers/media/usb/usbtv/usbtv-video.c9
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;
}