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[media] fsl-viu: add control event support 

Convert the driver to use v4l2_fh in order to support control events.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
hifive-unleashed-5.1
Hans Verkuil 2015-07-20 10:09:31 -03:00 committed by Mauro Carvalho Chehab
parent e299bc99bf
commit 7fe0b3d7c7
1 changed files with 18 additions and 3 deletions
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21
drivers/media/platform/fsl-viu.c
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@ -29,6 +29,8 @@
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/videobuf-dma-contig.h>
#define DRV_NAME "fsl_viu"
@ -154,6 +156,8 @@ struct viu_dev {
};
struct viu_fh {
/* must remain the first field of this struct */
struct v4l2_fh fh;
struct viu_dev *dev;
/* video capture */
@ -1199,6 +1203,7 @@ static int viu_open(struct file *file)
return -ENOMEM;
}
v4l2_fh_init(&fh->fh, vdev);
file->private_data = fh;
fh->dev = dev;
@ -1234,6 +1239,7 @@ static int viu_open(struct file *file)
fh->type, V4L2_FIELD_INTERLACED,
sizeof(struct viu_buf), fh,
&fh->dev->lock);
v4l2_fh_add(&fh->fh);
mutex_unlock(&dev->lock);
return 0;
}
@ -1266,13 +1272,17 @@ static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
struct viu_fh *fh = file->private_data;
struct videobuf_queue *q = &fh->vb_vidq;
struct viu_dev *dev = fh->dev;
unsigned int res;
unsigned long req_events = poll_requested_events(wait);
unsigned int res = v4l2_ctrl_poll(file, wait);
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
return POLLERR;
if (!(req_events & (POLLIN | POLLRDNORM)))
return res;
mutex_lock(&dev->lock);
res = videobuf_poll_stream(file, q, wait);
res |= videobuf_poll_stream(file, q, wait);
mutex_unlock(&dev->lock);
return res;
}
@ -1287,6 +1297,8 @@ static int viu_release(struct file *file)
viu_stop_dma(dev);
videobuf_stop(&fh->vb_vidq);
videobuf_mmap_free(&fh->vb_vidq);
v4l2_fh_del(&fh->fh);
v4l2_fh_exit(&fh->fh);
mutex_unlock(&dev->lock);
kfree(fh);
@ -1367,6 +1379,9 @@ static const struct v4l2_ioctl_ops viu_ioctl_ops = {
.vidioc_s_input = vidioc_s_input,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static struct video_device viu_template = {
@ -1468,7 +1483,7 @@ static int viu_of_probe(struct platform_device *op)
goto err_vdev;
}
memcpy(vdev, &viu_template, sizeof(viu_template));
*vdev = viu_template;
vdev->v4l2_dev = &viu_dev->v4l2_dev;