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Commit 1c2d034e authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

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



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: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 3d265c96

drivers/media/video/videodev.c

+23 −3
Original line number Diff line number Diff line
@@ -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;

		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;

	}