[media] cx25821: add create_bufs support

Add support for the VIDIOC_CREATE_BUFS ioctl. This was missing in this
driver and in vb2 it's trivial to add.

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

diff --git a/drivers/media/pci/cx25821/cx25821-video.c b/drivers/media/pci/cx25821/cx25821-video.c
index 3497946c72ea48859e65028380c9488faa4d78c2..827c3c036ba3c6af892b5b7c9cb09f7e4e73c1dd 100644 (file)
--- a/drivers/media/pci/cx25821/cx25821-video.c
+++ b/drivers/media/pci/cx25821/cx25821-video.c
@@ -146,9 +146,13 @@ static int cx25821_queue_setup(struct vb2_queue *q, const struct v4l2_format *fm
                           unsigned int sizes[], void *alloc_ctxs[])
 {
        struct cx25821_channel *chan = q->drv_priv;
+       unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;
+
+       if (fmt && fmt->fmt.pix.sizeimage < size)
+               return -EINVAL;
 
        *num_planes = 1;
-       sizes[0] = (chan->fmt->depth * chan->width * chan->height) >> 3;
+       sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
        alloc_ctxs[0] = chan->dev->alloc_ctx;
        return 0;
 }
@@ -610,6 +614,7 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
        .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
        .vidioc_reqbufs       = vb2_ioctl_reqbufs,
        .vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
+       .vidioc_create_bufs   = vb2_ioctl_create_bufs,
        .vidioc_querybuf      = vb2_ioctl_querybuf,
        .vidioc_qbuf          = vb2_ioctl_qbuf,
        .vidioc_dqbuf         = vb2_ioctl_dqbuf,