From c7a52f8dced9ee325b8e3a16a5ac07d191fc3d9b Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 7 Jun 2011 10:20:23 -0300 Subject: [PATCH] [media] vivi: support control events Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/vivi.c | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c index 2f0a1b40dd29..e81c10607bb2 100644 --- a/drivers/media/video/vivi.c +++ b/drivers/media/video/vivi.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #define VIVI_MODULE_NAME "vivi" @@ -978,12 +979,26 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i) if (i >= NUM_INPUTS) return -EINVAL; + if (i == dev->input) + return 0; + dev->input = i; precalculate_bars(dev); precalculate_line(dev); return 0; } +static int vidioc_subscribe_event(struct v4l2_fh *fh, + struct v4l2_event_subscription *sub) +{ + switch (sub->type) { + case V4L2_EVENT_CTRL: + return v4l2_ctrl_subscribe_fh(fh, sub, 0); + default: + return -EINVAL; + } +} + /* --- controls ---------------------------------------------- */ static int vivi_g_volatile_ctrl(struct v4l2_ctrl *ctrl) @@ -1022,10 +1037,17 @@ static unsigned int vivi_poll(struct file *file, struct poll_table_struct *wait) { struct vivi_dev *dev = video_drvdata(file); + struct v4l2_fh *fh = file->private_data; struct vb2_queue *q = &dev->vb_vidq; + unsigned int res; dprintk(dev, 1, "%s\n", __func__); - return vb2_poll(q, file, wait); + res = vb2_poll(q, file, wait); + if (v4l2_event_pending(fh)) + res |= POLLPRI; + else + poll_wait(file, &fh->events->wait, wait); + return res; } static int vivi_close(struct file *file) @@ -1132,7 +1154,7 @@ static const struct v4l2_ctrl_config vivi_ctrl_string = { static const struct v4l2_file_operations vivi_fops = { .owner = THIS_MODULE, - .open = v4l2_fh_open, + .open = v4l2_fh_open, .release = vivi_close, .read = vivi_read, .poll = vivi_poll, @@ -1156,6 +1178,8 @@ static const struct v4l2_ioctl_ops vivi_ioctl_ops = { .vidioc_s_input = vidioc_s_input, .vidioc_streamon = vidioc_streamon, .vidioc_streamoff = vidioc_streamoff, + .vidioc_subscribe_event = vidioc_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; static struct video_device vivi_template = { -- 2.30.2