Commit b36a4f81 authored by Guido Gunther's avatar Guido Gunther

MLK-18095 media: v4l2: Add VIDIOC_EXPBUF ioctl for DMABUF mode

Add VIDIOC_EXPBUF ioctl which exports a buffer as a DMABUF file descriptor.
After calling VIDIOC_EXPBUF the fd field will be set by a driver. This is a
DMABUF file descriptor. The application may pass it to other DMABUF-aware
devices. See V4L2 spec for more details.
Signed-off-by: default avatarRobby Cai <>
parent 1ca380bc
......@@ -1491,6 +1491,17 @@ static int mx6s_vidioc_querycap(struct file *file, void *priv,
return 0;
static int mx6s_vidioc_expbuf(struct file *file, void *priv,
struct v4l2_exportbuffer *eb)
struct mx6s_csi_dev *csi_dev = video_drvdata(file);
if (eb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return vb2_expbuf(&csi_dev->vb2_vidq, eb);
return -EINVAL;
static int mx6s_vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type i)
......@@ -1673,6 +1684,7 @@ static const struct v4l2_ioctl_ops mx6s_csi_ioctl_ops = {
.vidioc_enum_input = mx6s_vidioc_enum_input,
.vidioc_g_input = mx6s_vidioc_g_input,
.vidioc_s_input = mx6s_vidioc_s_input,
.vidioc_expbuf = mx6s_vidioc_expbuf,
.vidioc_streamon = mx6s_vidioc_streamon,
.vidioc_streamoff = mx6s_vidioc_streamoff,
.vidioc_g_parm = mx6s_vidioc_g_parm,
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