int saa7146_start_preview(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
struct v4l2_format fmt;
int ret = 0, err = 0;
DEB_EE("dev:%p, fh:%p\n", dev, fh);
/* check if we have overlay information */
if (vv->ov.fh == NULL) {
DEB_D("no overlay data available. try S_FMT first.\n");
return -EAGAIN;
}
/* check if streaming capture is running */
if (IS_CAPTURE_ACTIVE(fh) != 0) {
DEB_D("streaming capture is active\n");
return -EBUSY;
}
/* check if overlay is running */
if (IS_OVERLAY_ACTIVE(fh) != 0) {
if (vv->video_fh == fh) {
DEB_D("overlay is already active\n");
return 0;
}
DEB_D("overlay is already active in another open\n");
return -EBUSY;
}
if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
DEB_D("cannot get necessary overlay resources\n");
return -EBUSY;
}
fmt.fmt.win = vv->ov.win;
err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
if (0 != err) {
saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return -EBUSY;
}
vv->ov.win = fmt.fmt.win;
DEB_D("%dx%d+%d+%d %s field=%s\n",
vv->ov.win.w.width, vv->ov.win.w.height,
vv->ov.win.w.left, vv->ov.win.w.top,
vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]);
if (0 != (ret = saa7146_enable_overlay(fh))) {
DEB_D("enabling overlay failed: %d\n", ret);
saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return ret;
}
vv->video_status = STATUS_OVERLAY;
vv->video_fh = fh;
return 0;
}
int saa7146_stop_preview(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
DEB_EE(("dev:%p, fh:%p\n",dev,fh));
/* check if streaming capture is running */
if (IS_CAPTURE_ACTIVE(fh) != 0) {
DEB_D(("streaming capture is active.\n"));
return -EBUSY;
}
/* check if overlay is running at all */
if ((vv->video_status & STATUS_OVERLAY) == 0) {
DEB_D(("no active overlay.\n"));
return 0;
}
if (vv->video_fh != fh) {
DEB_D(("overlay is active, but in another open.\n"));
return -EBUSY;
}
vv->video_status = 0;
vv->video_fh = NULL;
saa7146_disable_overlay(fh);
saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
return 0;
}
static int video_end(struct saa7146_fh *fh, struct file *file)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt = NULL;
unsigned long flags;
unsigned int resource;
u32 dmas = 0;
DEB_EE(("dev:%p, fh:%p\n",dev,fh));
if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
DEB_S(("not capturing.\n"));
return 0;
}
if (vv->video_fh != fh) {
DEB_S(("capturing, but in another open.\n"));
return -EBUSY;
}
fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
/* we need to have a valid format set here */
BUG_ON(NULL == fmt);
if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
dmas = MASK_22 | MASK_21 | MASK_20;
} else {
resource = RESOURCE_DMA1_HPS;
dmas = MASK_22;
}
spin_lock_irqsave(&dev->slock,flags);
/* disable rps0 */
saa7146_write(dev, MC1, MASK_28);
/* disable rps0 irqs */
SAA7146_IER_DISABLE(dev, MASK_27);
/* shut down all used video dma transfers */
saa7146_write(dev, MC1, dmas);
spin_unlock_irqrestore(&dev->slock, flags);
vv->video_fh = NULL;
vv->video_status = 0;
saa7146_res_free(fh, resource);
if (vv->ov_suspend != NULL) {
saa7146_start_preview(vv->ov_suspend);
vv->ov_suspend = NULL;
}
return 0;
}
static void vbi_close(struct saa7146_dev *dev, struct file *file)
{
struct saa7146_fh *fh = file->private_data;
struct saa7146_vv *vv = dev->vv_data;
DEB_VBI("dev:%p, fh:%p\n", dev, fh);
if( fh == vv->vbi_streaming ) {
vbi_stop(fh, file);
}
saa7146_res_free(fh, RESOURCE_DMA3_BRS);
}
