3 files changed, 35 insertions, 6 deletions

diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index be85e0b0cbb..58e568d7d2e 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -66,8 +66,8 @@ static unsigned int latency = UNSET;
 module_param(latency, int, 0444);
 MODULE_PARM_DESC(latency,"pci latency timer");
 
-static int no_overlay=-1;
-module_param(no_overlay, int, 0444);
+int saa7134_no_overlay=-1;
+module_param_named(no_overlay, saa7134_no_overlay, int, 0444);
 MODULE_PARM_DESC(no_overlay,"allow override overlay default (0 disables, 1 enables)"
 		" [some VIA/SIS chipsets are known to have problem with overlay]");
 
@@ -843,11 +843,11 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 			printk(KERN_INFO "%s: quirk: this driver and your "
 					"chipset may not work together"
 					" in overlay mode.\n",dev->name);
-			if (!no_overlay) {
+			if (!saa7134_no_overlay) {
 				printk(KERN_INFO "%s: quirk: overlay "
 						"mode will be disabled.\n",
 						dev->name);
-				no_overlay = 1;
+				saa7134_no_overlay = 1;
 			} else {
 				printk(KERN_INFO "%s: quirk: overlay "
 						"mode will be forced. Use this"
@@ -957,6 +957,11 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 	v4l2_prio_init(&dev->prio);
 
 	/* register v4l devices */
+	if (saa7134_no_overlay <= 0) {
+		saa7134_video_template.type |= VID_TYPE_OVERLAY;
+	} else {
+		printk("bttv: Overlay support disabled.\n");
+	}
 	dev->video_dev = vdev_init(dev,&saa7134_video_template,"video");
 	err = video_register_device(dev->video_dev,VFL_TYPE_GRABBER,
 				    video_nr[dev->nr]);
diff --git a/drivers/media/video/saa7134/saa7134-video.c b/drivers/media/video/saa7134/saa7134-video.c
index 600c3c7e3dc..57a11e71d99 100644
--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -1462,6 +1462,10 @@ static int saa7134_g_fmt(struct saa7134_dev *dev, struct saa7134_fh *fh,
 			f->fmt.pix.height * f->fmt.pix.bytesperline;
 		return 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+		if (saa7134_no_overlay > 0) {
+			printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
+			return -EINVAL;
+		}
 		f->fmt.win = fh->win;
 		return 0;
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
@@ -1526,6 +1530,10 @@ static int saa7134_try_fmt(struct saa7134_dev *dev, struct saa7134_fh *fh,
 		return 0;
 	}
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+		if (saa7134_no_overlay > 0) {
+			printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
+			return -EINVAL;
+		}
 		err = verify_preview(dev,&f->fmt.win);
 		if (0 != err)
 			return err;
@@ -1556,6 +1564,10 @@ static int saa7134_s_fmt(struct saa7134_dev *dev, struct saa7134_fh *fh,
 		fh->cap.field = f->fmt.pix.field;
 		return 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+		if (saa7134_no_overlay > 0) {
+			printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
+			return -EINVAL;
+		}
 		err = verify_preview(dev,&f->fmt.win);
 		if (0 != err)
 			return err;
@@ -1715,11 +1727,13 @@ static int video_do_ioctl(struct inode *inode, struct file *file,
 		cap->version = SAA7134_VERSION_CODE;
 		cap->capabilities =
 			V4L2_CAP_VIDEO_CAPTURE |
-			V4L2_CAP_VIDEO_OVERLAY |
 			V4L2_CAP_VBI_CAPTURE |
 			V4L2_CAP_READWRITE |
 			V4L2_CAP_STREAMING |
 			V4L2_CAP_TUNER;
+		if (saa7134_no_overlay <= 0) {
+			cap->capabilities |= V4L2_CAP_VIDEO_OVERLAY;
+		}
 
 		if ((tuner_type == TUNER_ABSENT) || (tuner_type == UNSET))
 			cap->capabilities &= ~V4L2_CAP_TUNER;
@@ -1970,6 +1984,10 @@ static int video_do_ioctl(struct inode *inode, struct file *file,
 		switch (type) {
 		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+			if (saa7134_no_overlay > 0) {
+				printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
+				return -EINVAL;
+			}
 			if (index >= FORMATS)
 				return -EINVAL;
 			if (f->type == V4L2_BUF_TYPE_VIDEO_OVERLAY &&
@@ -2030,6 +2048,11 @@ static int video_do_ioctl(struct inode *inode, struct file *file,
 		int *on = arg;
 
 		if (*on) {
+			if (saa7134_no_overlay > 0) {
+				printk ("no_overlay\n");
+				return -EINVAL;
+			}
+
 			if (!res_get(dev,fh,RESOURCE_OVERLAY))
 				return -EBUSY;
 			spin_lock_irqsave(&dev->slock,flags);
@@ -2281,7 +2304,7 @@ static struct file_operations radio_fops =
 struct video_device saa7134_video_template =
 {
 	.name          = "saa7134-video",
-	.type          = VID_TYPE_CAPTURE|VID_TYPE_TUNER|VID_TYPE_OVERLAY|
+	.type          = VID_TYPE_CAPTURE|VID_TYPE_TUNER|
 			 VID_TYPE_CLIPPING|VID_TYPE_SCALES,
 	.hardware      = 0,
 	.fops          = &video_fops,
diff --git a/drivers/media/video/saa7134/saa7134.h b/drivers/media/video/saa7134/saa7134.h
index 683e785c18b..17ba34f3076 100644
--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -557,6 +557,7 @@ struct saa7134_dev {
 /* saa7134-core.c                                              */
 
 extern struct list_head  saa7134_devlist;
+extern int saa7134_no_overlay;
 
 void saa7134_track_gpio(struct saa7134_dev *dev, char *msg);