2 files changed, 63 insertions, 0 deletions

diff --git a/drivers/media/video/au0828/au0828-video.c b/drivers/media/video/au0828/au0828-video.c
index 20ba5915542f..8d11e544c879 100644
--- a/drivers/media/video/au0828/au0828-video.c
+++ b/drivers/media/video/au0828/au0828-video.c
@@ -312,6 +312,9 @@ static inline void buffer_filled(struct au0828_dev *dev,
 
         list_del(&buf->vb.queue);
         wake_up(&buf->vb.done);
+
+        /* Reset the timer for "no video condition" */
+        mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
 }
 
 static inline void vbi_buffer_filled(struct au0828_dev *dev,
@@ -329,6 +332,9 @@ static inline void vbi_buffer_filled(struct au0828_dev *dev,
 
         list_del(&buf->vb.queue);
         wake_up(&buf->vb.done);
+
+        /* Reset the timer for "no video condition" */
+        mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
 }
 
 /*
@@ -907,6 +913,50 @@ 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;
+
+        spin_lock(&dev->slock);
+
+        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);
+        }
+
+        spin_unlock(&dev->slock);
+}
+
+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;
+
+        spin_lock(&dev->slock);
+
+        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);
+        }
+
+        spin_unlock(&dev->slock);
+}
+
+
 static int au0828_v4l2_open(struct file *filp)
 {
         int ret = 0;
@@ -976,6 +1026,15 @@ static int au0828_v4l2_open(struct file *filp)
                                     V4L2_FIELD_SEQ_TB,
                                     sizeof(struct au0828_buffer), fh, NULL);
 
+        if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+                dev->vid_timeout.function = au0828_vid_buffer_timeout;
+                dev->vid_timeout.data = (unsigned long) dev;
+                init_timer(&dev->vid_timeout);
+        } else {
+                dev->vbi_timeout.function = au0828_vbi_buffer_timeout;
+                dev->vbi_timeout.data = (unsigned long) dev;
+                init_timer(&dev->vbi_timeout);
+        }
 
         return ret;
 }
@@ -987,11 +1046,13 @@ static int au0828_v4l2_close(struct file *filp)
         struct au0828_dev *dev = fh->dev;
 
         if (res_check(fh, AU0828_RESOURCE_VIDEO)) {
+                del_timer(&dev->vid_timeout);
                 videobuf_stop(&fh->vb_vidq);
                 res_free(fh, AU0828_RESOURCE_VIDEO);
         }
 
         if (res_check(fh, AU0828_RESOURCE_VBI)) {
+                del_timer(&dev->vbi_timeout);
                 videobuf_stop(&fh->vb_vbiq);
                 res_free(fh, AU0828_RESOURCE_VBI);
         }
diff --git a/drivers/media/video/au0828/au0828.h b/drivers/media/video/au0828/au0828.h
index 4dd8ce7f139e..ef46a889da20 100644
--- a/drivers/media/video/au0828/au0828.h
+++ b/drivers/media/video/au0828/au0828.h
@@ -204,6 +204,8 @@ struct au0828_dev {
         unsigned int resources; /* resources in use */
         struct video_device *vdev;
         struct video_device *vbi_dev;
+        struct timer_list vid_timeout;
+        struct timer_list vbi_timeout;
         int width;
         int height;
         int vbi_width;