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[1/3,media] em28xx: make sure that the device has video

Message ID 759f0a1be7c9e2937056189acdd7338e737d609f.1454087508.git.mchehab@osg.samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Mauro Carvalho Chehab Jan. 29, 2016, 5:11 p.m. UTC 
There are some devices, like Terratec Cinergy HTC, where
while the device supports analog TV, the driver is not
capable yet of handling it, because the analog TV driver
was not written.

So, don't bind the em28xx-v4l drivers on such devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---
 drivers/media/usb/em28xx/em28xx-cards.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index 2001c9c14784..ec4e95119877 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3468,7 +3468,7 @@  static int em28xx_usb_probe(struct usb_interface *interface,
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(interface, dev);
 
-	/* allocate device struct */
+	/* allocate device struct and check if the device is a webcam */
 	mutex_init(&dev->lock);
 	retval = em28xx_init_dev(dev, udev, interface, nr);
 	if (retval) {
@@ -3484,6 +3484,15 @@  static int em28xx_usb_probe(struct usb_interface *interface,
 		try_bulk = usb_xfer_mode > 0;
 	}
 
+	/* Disable V4L2 if the device doesn't have a decoder */
+	if (has_video &&
+	    dev->board.decoder == EM28XX_NODECODER && !dev->board.is_webcam) {
+		printk(DRIVER_NAME
+		       ": Currently, V4L2 is not supported on this model\n");
+		has_video = false;
+		dev->has_video = false;
+	}
+
 	/* Select USB transfer types to use */
 	if (has_video) {
 		if (!dev->analog_ep_isoc || (try_bulk && dev->analog_ep_bulk))