From d56ae6fbf33ddeb7ab2ffac896229ca473a7457f Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 4 Oct 2011 09:53:00 -0300 Subject: [PATCH] [media] em28xx: Add VIDIOC_QUERYSTD support Allow subdevs to return the detected standards Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/em28xx/em28xx-video.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 61f35c8d66d2..62182e311060 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1156,6 +1156,21 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) return 0; } +static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + int rc; + + rc = check_dev(dev); + if (rc < 0) + return rc; + + v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); + + return 0; +} + static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) { struct em28xx_fh *fh = priv; @@ -2354,6 +2369,7 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = { .vidioc_qbuf = vidioc_qbuf, .vidioc_dqbuf = vidioc_dqbuf, .vidioc_g_std = vidioc_g_std, + .vidioc_querystd = vidioc_querystd, .vidioc_s_std = vidioc_s_std, .vidioc_g_parm = vidioc_g_parm, .vidioc_s_parm = vidioc_s_parm, -- 2.20.1