diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2021-06-28 17:53:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-27 15:59:18 +0200 |
| commit | 9973772dbb2b9c12a0707eca692f0dabf6295978 (patch) | |
| tree | bbf9a6659924a6d79a012a279d0e4dc566cc2f25 /drivers/usb/gadget/function/uvc_queue.c | |
| parent | c6e23b89a95db73bb85be28079664c66389323f0 (diff) | |
usb: gadget: uvc: make uvc_num_requests depend on gadget speed
While sending bigger images is possible with USB_SPEED_SUPER it is
better to use more isochronous requests in flight. This patch makes the
number uvc_num_requests dynamic by changing it depending on the gadget
speed.
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20210628155311.16762-3-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget/function/uvc_queue.c')
| -rw-r--r-- | drivers/usb/gadget/function/uvc_queue.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 61e2c94cc0b0..ff0cc08531d2 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -43,6 +43,7 @@ static int uvc_queue_setup(struct vb2_queue *vq, { struct uvc_video_queue *queue = vb2_get_drv_priv(vq); struct uvc_video *video = container_of(queue, struct uvc_video, queue); + struct usb_composite_dev *cdev = video->uvc->func.config->cdev; if (*nbuffers > UVC_MAX_VIDEO_BUFFERS) *nbuffers = UVC_MAX_VIDEO_BUFFERS; @@ -51,6 +52,11 @@ static int uvc_queue_setup(struct vb2_queue *vq, sizes[0] = video->imagesize; + if (cdev->gadget->speed < USB_SPEED_SUPER) + video->uvc_num_requests = 4; + else + video->uvc_num_requests = 64; + return 0; } |