[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>

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 898c208..103cd4e 100644 (file)
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -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;