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V4L/DVB (4637): Add a default method for VIDIOC_G_PARM

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For most drivers, VIDIOC_G_PARM will just return the current standard fps.
So, instead of failing, drivers based on video_ioctl2 will implement the
default method.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2006-09-14 13:36:34 -03:00
parent 3d265c96cc
commit 1c2d034e3c
1 changed files with 23 additions and 3 deletions
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26
drivers/media/video/videodev.c
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@ -1283,9 +1283,29 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
case VIDIOC_G_PARM:
{
struct v4l2_streamparm *p=arg;
if (!vfd->vidioc_g_parm)
break;
ret=vfd->vidioc_g_parm(file, fh, p);
if (vfd->vidioc_g_parm) {
ret=vfd->vidioc_g_parm(file, fh, p);
} else {
struct v4l2_standard s;
if (!vfd->tvnormsize) {
printk (KERN_WARNING "%s: no TV norms defined!\n",
vfd->name);
break;
}
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
v4l2_video_std_construct(&s, vfd->tvnorms[vfd->current_norm].id,
vfd->tvnorms[vfd->current_norm].name);
memset(p,0,sizeof(*p));
p->parm.capture.timeperframe = s.frameperiod;
ret=0;
}
dbgarg (cmd, "type=%d\n", p->type);
break;
}