Dne 24.1.2017 v 19:20 Felipe Balbi napsal(a):
> 
> Hi,
> 
> Petr Cvek <petr.c...@tul.cz> writes:
>>> Greg KH <g...@kroah.com> writes:
>>>>>>> fine by me. Just lsusb will look funky ;-)
>>>>>>
>>>>>> Heh, true, but I thought lsusb would use a string if the device provided
>>>>>> it.  Haven't looked at that portion of the code in a very long time...
>>>>>>
>>>>>
>>>>> My lsusb shows separate strings (using usbutils from slackware64-current):
>>>>>
>>>>> Bus 004 Device 003: ID 1d6b:0102 Linux Foundation EEM Gadget
>>>>> ...
>>>>>   idVendor           0x1d6b Linux Foundation
>>>>>   idProduct          0x0102 EEM Gadget
>>>>>   bcdDevice            4.07
>>>>>   iManufacturer           1 Linux Foundation
>>>>>   iProduct                2 Webcam gadget
>>>>> ...
>>>>
>>>> Ah, I guess it doesn't, but who knows how old that version of usbutils
>>>> is, considering the last release I did was well over a year ago.  I
>>>> should do a new one one of these days...
>>>>
>>>> Anyway, I'd like to not assign a product id to a chunk of code that is
>>>> going to be eventually deleted.  Felipe, what's the plan for the
>>>> "legacy" gadget code.  Is it ever going away?
>>>
>>> Well, I wasn't really planning on deleting them just stopped accepting
>>> any new one. I wanted to avoid angry mobs complaining about not having a
>>> g_mass_storage.ko anymore.
>>>
>>> Personally, I don't feel strongly about the legacy gadget
>>> drivers. They're not really needed anymore as everything they do can be
>>> done with configfs already. Perhaps we could schedule their removal for
>>> v5.0?
>>>
>>
>> If you want to remove legacy g_webcam then there should be a way to
>> set its module parameters from somewhere (it seems I can't find it
>> anywhere). For PXA27x especially "opts->streaming_maxpacket" from
>> f_uvc.c is critical. Default max packet size in PXA27x UDC (but
>> lowering the limit to 256 by g_webcam parameter works).
> 
> it should be part of the function's configfs interface. If it's not,
> please send a patch. Have a look at
> Documentation/usb/gadget_configfs.txt for more info.
> 

Hi 

sorry for a late answer (it took so much time to get my machine to the stage 
with working UVC :-/ ). It is really not working and I think I found why. Will 
send a patch soon.

Petr
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