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[media] soc_camera: Support VIDIOC_EXPBUF ioctl

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This patch allows for exporting a dmabuf descriptor from soc_camera drivers.

Signed-off-by: Kazunori Kobayashi <kkobayas@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Kazunori Kobayashi 2014-09-11 03:09:38 -03:00 committed by Mauro Carvalho Chehab
parent 5d6de11c33
commit c710f591a6
1 changed files with 17 additions and 0 deletions
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17
drivers/media/platform/soc_camera/soc_camera.c
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@ -437,6 +437,22 @@ static int soc_camera_prepare_buf(struct file *file, void *priv,
return vb2_prepare_buf(&icd->vb2_vidq, b);
}
static int soc_camera_expbuf(struct file *file, void *priv,
struct v4l2_exportbuffer *p)
{
struct soc_camera_device *icd = file->private_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
if (icd->streamer != file)
return -EBUSY;
/* videobuf2 only */
if (ici->ops->init_videobuf)
return -EINVAL;
else
return vb2_expbuf(&icd->vb2_vidq, p);
}
/* Always entered with .host_lock held */
static int soc_camera_init_user_formats(struct soc_camera_device *icd)
{
@ -2083,6 +2099,7 @@ static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
.vidioc_dqbuf = soc_camera_dqbuf,
.vidioc_create_bufs = soc_camera_create_bufs,
.vidioc_prepare_buf = soc_camera_prepare_buf,
.vidioc_expbuf = soc_camera_expbuf,
.vidioc_streamon = soc_camera_streamon,
.vidioc_streamoff = soc_camera_streamoff,
.vidioc_cropcap = soc_camera_cropcap,