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path: root/drivers/media/video/au0828/au0828-video.c
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Diffstat (limited to 'drivers/media/video/au0828/au0828-video.c')
-rw-r--r--drivers/media/video/au0828/au0828-video.c118
1 files changed, 100 insertions, 18 deletions
diff --git a/drivers/media/video/au0828/au0828-video.c b/drivers/media/video/au0828/au0828-video.c
index 162fd5f9d44..e41e4ad5cc4 100644
--- a/drivers/media/video/au0828/au0828-video.c
+++ b/drivers/media/video/au0828/au0828-video.c
@@ -122,6 +122,7 @@ static void au0828_irq_callback(struct urb *urb)
{
struct au0828_dmaqueue *dma_q = urb->context;
struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
+ unsigned long flags = 0;
int rc, i;
switch (urb->status) {
@@ -139,9 +140,9 @@ static void au0828_irq_callback(struct urb *urb)
}
/* Copy data from URB */
- spin_lock(&dev->slock);
+ spin_lock_irqsave(&dev->slock, flags);
rc = dev->isoc_ctl.isoc_copy(dev, urb);
- spin_unlock(&dev->slock);
+ spin_unlock_irqrestore(&dev->slock, flags);
/* Reset urb buffers */
for (i = 0; i < urb->number_of_packets; i++) {
@@ -576,7 +577,7 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
p += 4;
au0828_isocdbg("Video frame %s\n",
(fbyte & 0x40) ? "odd" : "even");
- if (!(fbyte & 0x40)) {
+ if (fbyte & 0x40) {
/* VBI */
if (vbi_buf != NULL)
vbi_buffer_filled(dev,
@@ -597,6 +598,15 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
outp = NULL;
else
outp = videobuf_to_vmalloc(&buf->vb);
+
+ /* As long as isoc traffic is arriving, keep
+ resetting the timer */
+ if (dev->vid_timeout_running)
+ mod_timer(&dev->vid_timeout,
+ jiffies + (HZ / 10));
+ if (dev->vbi_timeout_running)
+ mod_timer(&dev->vbi_timeout,
+ jiffies + (HZ / 10));
}
if (buf != NULL) {
@@ -907,6 +917,57 @@ static int get_ressource(struct au0828_fh *fh)
}
}
+/* This function ensures that video frames continue to be delivered even if
+ the ITU-656 input isn't receiving any data (thereby preventing applications
+ such as tvtime from hanging) */
+void au0828_vid_buffer_timeout(unsigned long data)
+{
+ struct au0828_dev *dev = (struct au0828_dev *) data;
+ struct au0828_dmaqueue *dma_q = &dev->vidq;
+ struct au0828_buffer *buf;
+ unsigned char *vid_data;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&dev->slock, flags);
+
+ buf = dev->isoc_ctl.buf;
+ if (buf != NULL) {
+ vid_data = videobuf_to_vmalloc(&buf->vb);
+ memset(vid_data, 0x00, buf->vb.size); /* Blank green frame */
+ buffer_filled(dev, dma_q, buf);
+ }
+ get_next_buf(dma_q, &buf);
+
+ if (dev->vid_timeout_running == 1)
+ mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
+
+ spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+void au0828_vbi_buffer_timeout(unsigned long data)
+{
+ struct au0828_dev *dev = (struct au0828_dev *) data;
+ struct au0828_dmaqueue *dma_q = &dev->vbiq;
+ struct au0828_buffer *buf;
+ unsigned char *vbi_data;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&dev->slock, flags);
+
+ buf = dev->isoc_ctl.vbi_buf;
+ if (buf != NULL) {
+ vbi_data = videobuf_to_vmalloc(&buf->vb);
+ memset(vbi_data, 0x00, buf->vb.size);
+ vbi_buffer_filled(dev, dma_q, buf);
+ }
+ vbi_get_next_buf(dma_q, &buf);
+
+ if (dev->vbi_timeout_running == 1)
+ mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
+ spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+
static int au0828_v4l2_open(struct file *filp)
{
int ret = 0;
@@ -976,7 +1037,6 @@ static int au0828_v4l2_open(struct file *filp)
V4L2_FIELD_SEQ_TB,
sizeof(struct au0828_buffer), fh, NULL);
-
return ret;
}
@@ -987,11 +1047,19 @@ static int au0828_v4l2_close(struct file *filp)
struct au0828_dev *dev = fh->dev;
if (res_check(fh, AU0828_RESOURCE_VIDEO)) {
+ /* Cancel timeout thread in case they didn't call streamoff */
+ dev->vid_timeout_running = 0;
+ del_timer_sync(&dev->vid_timeout);
+
videobuf_stop(&fh->vb_vidq);
res_free(fh, AU0828_RESOURCE_VIDEO);
}
if (res_check(fh, AU0828_RESOURCE_VBI)) {
+ /* Cancel timeout thread in case they didn't call streamoff */
+ dev->vbi_timeout_running = 0;
+ del_timer_sync(&dev->vbi_timeout);
+
videobuf_stop(&fh->vb_vbiq);
res_free(fh, AU0828_RESOURCE_VBI);
}
@@ -1048,6 +1116,13 @@ static ssize_t au0828_v4l2_read(struct file *filp, char __user *buf,
if (!res_get(fh, AU0828_RESOURCE_VBI))
return -EBUSY;
+ if (dev->vbi_timeout_running == 0) {
+ /* Handle case where caller tries to read without
+ calling streamon first */
+ dev->vbi_timeout_running = 1;
+ mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
+ }
+
return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
}
@@ -1577,10 +1652,15 @@ static int vidioc_streamon(struct file *file, void *priv,
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
}
- if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
rc = videobuf_streamon(&fh->vb_vidq);
- else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
+ dev->vid_timeout_running = 1;
+ mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
+ } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
rc = videobuf_streamon(&fh->vb_vbiq);
+ dev->vbi_timeout_running = 1;
+ mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
+ }
return rc;
}
@@ -1607,6 +1687,9 @@ static int vidioc_streamoff(struct file *file, void *priv,
fh, type, fh->resources, dev->resources);
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ dev->vid_timeout_running = 0;
+ del_timer_sync(&dev->vid_timeout);
+
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
rc = au0828_stream_interrupt(dev);
if (rc != 0)
@@ -1621,6 +1704,9 @@ static int vidioc_streamoff(struct file *file, void *priv,
videobuf_streamoff(&fh->vb_vidq);
res_free(fh, AU0828_RESOURCE_VIDEO);
} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+ dev->vbi_timeout_running = 0;
+ del_timer_sync(&dev->vbi_timeout);
+
videobuf_streamoff(&fh->vb_vbiq);
res_free(fh, AU0828_RESOURCE_VBI);
}
@@ -1723,15 +1809,6 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
}
-#ifdef CONFIG_VIDEO_V4L1_COMPAT
-static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
-{
- struct au0828_fh *fh = priv;
-
- return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
-}
-#endif
-
static struct v4l2_file_operations au0828_v4l_fops = {
.owner = THIS_MODULE,
.open = au0828_v4l2_open,
@@ -1775,9 +1852,6 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
.vidioc_s_register = vidioc_s_register,
#endif
.vidioc_g_chip_ident = vidioc_g_chip_ident,
-#ifdef CONFIG_VIDEO_V4L1_COMPAT
- .vidiocgmbuf = vidiocgmbuf,
-#endif
};
static const struct video_device au0828_video_template = {
@@ -1840,6 +1914,14 @@ int au0828_analog_register(struct au0828_dev *dev,
INIT_LIST_HEAD(&dev->vbiq.active);
INIT_LIST_HEAD(&dev->vbiq.queued);
+ dev->vid_timeout.function = au0828_vid_buffer_timeout;
+ dev->vid_timeout.data = (unsigned long) dev;
+ init_timer(&dev->vid_timeout);
+
+ dev->vbi_timeout.function = au0828_vbi_buffer_timeout;
+ dev->vbi_timeout.data = (unsigned long) dev;
+ init_timer(&dev->vbi_timeout);
+
dev->width = NTSC_STD_W;
dev->height = NTSC_STD_H;
dev->field_size = dev->width * dev->height;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 20:27:48 +0000