From e5ce558a6157e49374ba762471b77ce89ada4df0 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 17 Jul 2014 18:45:45 -0300 Subject: [PATCH] [media] v4l2-ioctl: clips, clipcount and bitmap should not be zeroed Otherwise you cannot get the current clip and bitmap information from an overlay. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- 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 46f45f087a83..e620387b29ca 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)), -- 2.20.1