Laurent Pinchart wrote: > Hi Greg, > > On Monday 03 May 2010 19:15:48 Greg KH wrote: >> On Mon, May 03, 2010 at 02:29:57PM +0200, Laurent Pinchart wrote: >>> On Monday 03 May 2010 13:14:11 Viral Mehta wrote: >>>> Hi, >>>> >>>>> This USB video class function driver implements a video capture device >>>> >from the host's point of view. It creates a V4L2 output device on the >>>>> gadget's side to transfer data from a userspace application over USB. >>>>> >>>>> The UVC-specific descriptors are passed by the gadget driver to the >>>>> UVC function driver, making them completely configurable without any >>>>> modification to the function's driver code. >>>> I wanted to test this code. I git cloned[1] tree. It has >>>> v4l2-event.[c,h] and so I assume that now this tree has support for >>>> v4l2 event code. >>>> >>>> But, while compilation, I am getting this error. >>>> [root@viral linux-next]# make uImage > /dev/null && make modules >>>> >>>> CHK include/linux/version.h >>>> CHK include/generated/utsrelease.h >>>> >>>> make[1]: `include/generated/mach-types.h' is up to date. >>>> >>>> CALL scripts/checksyscalls.sh >>>> Building modules, stage 2. >>>> MODPOST 5 modules >>>> >>>> ERROR: "v4l2_event_dequeue" [drivers/usb/gadget/g_webcam.ko] undefined! >>>> ERROR: "v4l2_event_init" [drivers/usb/gadget/g_webcam.ko] undefined! >>>> make[1]: *** [__modpost] Error 1 >>>> make: *** [modules] Error 2 >>>> >>>> And by looking at the code, those symbols are not exported and thus the >>>> error is obvious. Can you please point me out where to take v4l2-event >>>> code? I tried to look for on linuxtv.org but was not able to locate the >>>> right code. >>>> >>>> [1]git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-next.git >>> There's a patch pending on the linux-media list to export those two >>> functions. It has been acked by Sakari (the author of the V4L2 events >>> patch set), but not committed by Mauro to his linux-next yet. That >>> should be a matter of days. >> Do you have a pointer to that patch? I'll take it into my usb tree for >> now, to keep things building, and let Mauro send it to Linus for >> merging. > > Sure > > https://patchwork.kernel.org/patch/96373/ > > But please note it requires the V4L2 events patch set from Mauro's linux-next > tree. Btw, this patch is already on my linux-next tree. -- Cheers, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
