From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Use v4l2_fh which gives you control events and priority handling for free.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/common/saa7146_fops.c | 18 ++++++++++++------
drivers/media/common/saa7146_video.c | 4 ++++
include/media/saa7146_vv.h | 3 +++
3 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
index 2ea67da..afa922f 100644
--- a/drivers/media/common/saa7146_fops.c
+++ b/drivers/media/common/saa7146_fops.c
@@ -198,7 +198,6 @@ static int fops_open(struct file *file)
struct saa7146_dev *dev = video_drvdata(file);
struct saa7146_fh *fh = NULL;
int result = 0;
-
enum v4l2_buf_type type;
DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
@@ -227,7 +226,9 @@ static int fops_open(struct file *file)
goto out;
}
- file->private_data = fh;
+ v4l2_fh_init(&fh->fh, vdev);
+
+ file->private_data = &fh->fh;
fh->dev = dev;
if (vdev->vfl_type == VFL_TYPE_VBI) {
@@ -251,6 +252,7 @@ static int fops_open(struct file *file)
}
result = 0;
+ v4l2_fh_add(&fh->fh);
out:
if (fh && result != 0) {
kfree(fh);
@@ -280,6 +282,8 @@ static int fops_release(struct file *file)
saa7146_video_uops.release(dev,file);
}
+ v4l2_fh_del(&fh->fh);
+ v4l2_fh_exit(&fh->fh);
module_put(dev->ext->module);
file->private_data = NULL;
kfree(fh);
@@ -322,12 +326,13 @@ static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
struct saa7146_fh *fh = file->private_data;
struct videobuf_buffer *buf = NULL;
struct videobuf_queue *q;
+ unsigned int res = v4l2_ctrl_poll(file, wait);
DEB_EE("file:%p, poll:%p\n", file, wait);
if (vdev->vfl_type == VFL_TYPE_VBI) {
if( 0 == fh->vbi_q.streaming )
- return videobuf_poll_stream(file, &fh->vbi_q, wait);
+ return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
q = &fh->vbi_q;
} else {
DEB_D("using video queue\n");
@@ -339,17 +344,17 @@ static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
if (!buf) {
DEB_D("buf == NULL!\n");
- return POLLERR;
+ return res | POLLERR;
}
poll_wait(file, &buf->done, wait);
if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
DEB_D("poll succeeded!\n");
- return POLLIN|POLLRDNORM;
+ return res | POLLIN | POLLRDNORM;
}
DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
- return 0;
+ return res;
}
static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
@@ -579,6 +584,7 @@ int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
vfd->lock = &dev->v4l2_lock;
vfd->v4l2_dev = &dev->v4l2_dev;
vfd->tvnorms = 0;
+ set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
for (i = 0; i < dev->ext_vv_data->num_stds; i++)
vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
strlcpy(vfd->name, name, sizeof(vfd->name));
diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c
index 8507990..4ca9a25 100644
--- a/drivers/media/common/saa7146_video.c
+++ b/drivers/media/common/saa7146_video.c
@@ -2,6 +2,8 @@
#include <media/saa7146_vv.h>
#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ctrls.h>
#include <linux/module.h>
static int max_memory = 32;
@@ -1021,6 +1023,8 @@ const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_g_parm = vidioc_g_parm,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/*********************************************************************************/
diff --git a/include/media/saa7146_vv.h b/include/media/saa7146_vv.h
index 2cc32c5..2bbdf30 100644
--- a/include/media/saa7146_vv.h
+++ b/include/media/saa7146_vv.h
@@ -3,6 +3,7 @@
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fh.h>
#include <media/saa7146.h>
#include <media/videobuf-dma-sg.h>
@@ -84,6 +85,8 @@ struct saa7146_overlay {
/* per open data */
struct saa7146_fh {
+ /* Must be the first field! */
+ struct v4l2_fh fh;
struct saa7146_dev *dev;
/* video capture */
--
1.7.10
--
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