diff options
| author | Roger Quadros <rogerq@ti.com> | 2017-03-08 16:05:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:41:23 +0200 |
| commit | d8ec35ad8b36eba708af614b54eda471ba125eed (patch) | |
| tree | 54f2195d6a11843576a26490056f8dacde5dcbd7 /drivers/usb/gadget | |
| parent | ff8d97a822c65e8ae6ceaa67369c0d56f6797c9b (diff) | |
usb: gadget: f_uvc: Fix SuperSpeed companion descriptor's wBytesPerInterval
commit 09424c50b7dff40cb30011c09114404a4656e023 upstream.
The streaming_maxburst module parameter is 0 offset (0..15)
so we must add 1 while using it for wBytesPerInterval
calculation for the SuperSpeed companion descriptor.
Without this host uvcvideo driver will always see the wrong
wBytesPerInterval for SuperSpeed uvc gadget and may not find
a suitable video interface endpoint.
e.g. for streaming_maxburst = 0 case it will always
fail as wBytePerInterval was evaluating to 0.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/function/f_uvc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 29b41b5dee04..c7689d05356c 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -625,7 +625,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst; uvc_ss_streaming_comp.wBytesPerInterval = cpu_to_le16(max_packet_size * max_packet_mult * - opts->streaming_maxburst); + (opts->streaming_maxburst + 1)); /* Allocate endpoints. */ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); |