Messages in this thread Patch in this message | | | From | Lipengcheng <> | Subject | [PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value | Date | Tue, 26 Dec 2017 02:52:08 +0000 |
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The value is 4, it can cache four descriptors. When streaming_interval = 1, it can tolerate 500us. Some busy scenes, it may be more than 500us because cpu scheduling is not timely. There will have some problems. It is better set to eight.
Signed-off-by: Pengcheng Li <lpc.li@hisilicon.com> --- drivers/usb/gadget/function/uvc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index a64e07e..901487e 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -90,7 +90,7 @@ extern unsigned int uvc_gadget_trace_param; * Driver specific constants */
-#define UVC_NUM_REQUESTS 4 +#define UVC_NUM_REQUESTS 8 #define UVC_MAX_REQUEST_SIZE 64 #define UVC_MAX_EVENTS 4
-- 2.7.4
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