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[media] uvcvideo: Update uvc_endpoint_max_bpi to handle USB_SPEED_WIRELESS devices 

Isochronous endpoints on devices with speed == USB_SPEED_WIRELESS can
have a max packet size ranging from 1-3584 bytes.  Add a case to
uvc_endpoint_max_bpi to handle USB_SPEED_WIRELESS.  Otherwise endpoints
for those devices will fall to the default case which masks off any
values > 2047.  This causes uvc_init_video to underestimate the
bandwidth available and fail to find a suitable alt setting for high
bandwidth video streams.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Thomas Pugliese 2014-01-24 18:17:28 -03:00 committed by Mauro Carvalho Chehab
parent daf41ac2c4
commit 79af67e77f
1 changed files with 3 additions and 0 deletions
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3
drivers/media/usb/uvc/uvc_video.c
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@ -1453,6 +1453,9 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
case USB_SPEED_HIGH:
psize = usb_endpoint_maxp(&ep->desc);
return (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
case USB_SPEED_WIRELESS:
psize = usb_endpoint_maxp(&ep->desc);
return psize;
default:
psize = usb_endpoint_maxp(&ep->desc);
return psize & 0x07ff;