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media: usb: uvc: make use of new usb_endpoint_maxp_mult()

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We have introduced a helper to calculate multiplier
value from wMaxPacketSize. Start using it.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: <linux-media@vger.kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-09-28 13:22:53 +03:00
parent b72b7979c3
commit 08295ee0e6
1 changed files with 3 additions and 1 deletions
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4
drivers/media/usb/uvc/uvc_video.c
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@ -1467,6 +1467,7 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
struct usb_host_endpoint *ep)
{
u16 psize;
u16 mult;
switch (dev->speed) {
case USB_SPEED_SUPER:
@ -1474,7 +1475,8 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval);
case USB_SPEED_HIGH:
psize = usb_endpoint_maxp(&ep->desc);
return (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
mult = usb_endpoint_maxp_mult(&ep->desc);
return (psize & 0x07ff) * mult;
case USB_SPEED_WIRELESS:
psize = usb_endpoint_maxp(&ep->desc);
return psize;