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.h | |
| parent | usb: dwc3: gadget: set gadgets parent to the right controller (diff) | |
| download | linux-9973772dbb2b9c12a0707eca692f0dabf6295978.tar.xz linux-9973772dbb2b9c12a0707eca692f0dabf6295978.zip | |
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.h')
| -rw-r--r-- | drivers/usb/gadget/function/uvc.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 23ee25383c1f..52f894183ecf 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -65,13 +65,17 @@ extern unsigned int uvc_gadget_trace_param; * Driver specific constants */ -#define UVC_NUM_REQUESTS 4 #define UVC_MAX_REQUEST_SIZE 64 #define UVC_MAX_EVENTS 4 /* ------------------------------------------------------------------------ * Structures */ +struct uvc_request { + struct usb_request *req; + u8 *req_buffer; + struct uvc_video *video; +}; struct uvc_video { struct uvc_device *uvc; @@ -87,10 +91,11 @@ struct uvc_video { unsigned int imagesize; struct mutex mutex; /* protects frame parameters */ + unsigned int uvc_num_requests; + /* Requests */ unsigned int req_size; - struct usb_request *req[UVC_NUM_REQUESTS]; - __u8 *req_buffer[UVC_NUM_REQUESTS]; + struct uvc_request *ureq; struct list_head req_free; spinlock_t req_lock; |