Guennadi, On Sun, Feb 3, 2013 at 2:32 AM, Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote: > On Wed, 30 Jan 2013, Prabhakar Lad wrote: > >> Hi Guennadi, >> >> I am working on adding v4l-asyn for capture and display device.. >> >> Here is my hw details:-- >> 1: The capture device has two subdevs tvp514x @0x5c and tvp514x @0x5d. >> 2: The display device has a one subdev adv7343 @0x2a. >> >> Note:- I have added async support for all the subdevices and the >> capture and display driver too >> >> Test Case:- >> 1: I have v4l2_async_notifier_register() for both capture and >> display driver, as of now I have built >> the subdevices as module. when board is up, I insert the >> tvp514x subdevices and the capture >> driver gets intialized (/dev/video0 & /dev/video1) nodes get >> created, now I do insmod on the other >> subdevice adv7343, the bound callback is called in capture >> driver, but whereas this should have been >> called in the display driver. > > This certainly _should_ not happen. Your subdevice driver should call > v4l2_async_subdev_bound(), which will walk the notifier list and check, > which of them this subdevice matches. I'm afraid you'll have to debug your > set up to see why the wrong notifier matches. > >> 2: When I build the subdevices as part of uImage I hit a crash. >> Attached is the crash log. > > The crash happens in v4l2_async_notifier_register() when a newly > registered notifier walks the list of _already_ successfully probed > subdevices. Then I'm not exactly sure where the actual crash happens, one > of the possibilities is if the match_i2c() function is called for an > invalid or unbound i2c device. You'll have to debug this too. > Trying to debug, I see that list_for_each_entry() in v4l2_async_belongs() is picking up some invalid entry which is causing it to crash! Cheers, --Prabhakar > Thanks > Guennadi > >> 3: When I just build and use either the capture/display driver and >> their respective subdevices only every thing works fine. >> >> Regards, >> --Prabhakar >> > > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
