Re: [PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value

2018-01-08 Thread Felipe Balbi
Hi, Lipengcheng writes: > 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: Pengch

RE: [PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value

2017-12-25 Thread Lipengcheng
: [PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value > > Hi, > > > On 12/26/2017 8:22 AM, Lipengcheng wrote: > > 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 > >

Re: [PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value

2017-12-25 Thread Manu Gautam
Hi, On 12/26/2017 8:22 AM, Lipengcheng wrote: > 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. > >

[PATCH] usb: gadget: uvc:change the UVC_NUM_REQUESTS value

2017-12-25 Thread Lipengcheng
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 --- drivers/usb/gadget/functi