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[media] em28xx: make sure that the device has video 

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>
This commit is contained in:
Mauro Carvalho Chehab 2016-01-29 12:53:56 -02:00
parent 41a5e7ea7d
commit 22580f7cb9
1 changed files with 10 additions and 1 deletions
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11
drivers/media/usb/em28xx/em28xx-cards.c
View File

@ -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))