Otherwise you cannot get the current clip and bitmap information from
an overlay.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 46f45f0..e620387 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1145,6 +1145,30 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
+ /*
+ * fmt can't be cleared for these overlay types due to the 'clips'
+ * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
+ * Those are provided by the user. So handle these two overlay types
+ * first, and then just do a simple memset for the other types.
+ */
+ switch (p->type) {
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
+ struct v4l2_clip *clips = p->fmt.win.clips;
+ u32 clipcount = p->fmt.win.clipcount;
+ void *bitmap = p->fmt.win.bitmap;
+
+ memset(&p->fmt, 0, sizeof(p->fmt));
+ p->fmt.win.clips = clips;
+ p->fmt.win.clipcount = clipcount;
+ p->fmt.win.bitmap = bitmap;
+ break;
+ }
+ default:
+ memset(&p->fmt, 0, sizeof(p->fmt));
+ break;
+ }
+
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
@@ -2140,7 +2164,7 @@ struct v4l2_ioctl_info {
static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
- IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
+ IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
--
2.0.1
--
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