lkml.org 
[lkml]   [2018]   [Sep]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v4 6/8] usb: dwc3: check for requests in started list for stream capable endpoints
Date
Hi,

On 9/10/2018 1:13 PM, Thinh Nguyen wrote:
> Hi Anurag,
>
> On 9/8/2018 8:03 AM, Anurag Kumar Vulisha wrote:
>> For stream capable endpoints, uas layer can queue mulpile requests on
>> single ep with different stream ids. So, there can be multiple pending
>> requests waiting to be transferred. This patch changes the code to check
>> for any pending requests waiting to be transferred on ep started_list and
>> calls __dwc3_gadget_kick_transfer() if any.
> Whenever a function driver queues a request, then
> __dwc3_gadget_kick_transfer() will be called right? What case exactly is
> this for? Scatter gathering? If so, then we probably need further
> explanation. (e.g. Why wait to call __dwc3_gadget_kick_transfer() on
> XferComplete event rather than sending a START_TRANSFER command for
> every prepared TRB whenever we do __dwc3_gadget_kick_transfer()?).

Please ignore my question. We only do 1 transfer per stream id at a
time. That's fine.

Thanks,
Thinh

\
 
 \ /
  Last update: 2018-09-11 00:51    [W:0.064 / U:1.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site