And please help me udnerstand what is the difference between 'y' and 'm' in 'CONFIG_VIDEOBUF2_CORE=y instead of CONFIG_VIDEOBUF2_CORE=m'? On Thu, Jan 9, 2014 at 10:23 PM, m silverstri <michael.j.silverstri@xxxxxxxxx> wrote: > Thanks. Can you please help me understand what you mean by 'make this > to build into kernel instead of static'? > > > On Thu, Jan 9, 2014 at 7:18 PM, Ashokkumar G > <ashok.sysprogrammer@xxxxxxxxx> wrote: >> Dear Silverstri, >> >> I am not sure for which platform you are compiling Kernel. >> >> But for X86(_64) and ARM, CONFIG_VIDEOBUF2_CORE will be selected as a module >> (will not build into kernel image static), this is the dependency >> VIDEOBUF2_DMA_CONTIG [=m] && MEDIA_SUPPORT [=m] && HAS_DMA [=y] || >> VIDEOBUF2_VMALLOC [=m] && MEDIA_SUPPORT [=m] || VIDEOBUF2_DMA_SG [=n] && >> MEDIA_SUPPORT [=m] || SOC_CAMERA [=m] && MEDIA_SUPPORT [=m] && >> V4L_PLATFORM_DRIVERS [=y] && VIDEO_V4L2 [=m] && HAS_DMA [=y] && I2C [=y]. >> >> select MEDIA_SUPPORT and SOC_CAMERA to build into kernel image static (when >> you select one of MEDIA_SUPPORT/SOC_CAMERA/VIDEO_V4L2 as build static into >> kernel, .config will have CONFIG_VIDEOBUF2_CORE=y instead of >> CONFIG_VIDEOBUF2_CORE=m) >> >> For ARM board I used Device Drivers->Multimedia Support (make this to build >> into kernel instead of static)->V4L platform devices (make this to build >> into kernel instead of static)->Soc Camera Support(make this to build into >> kernel instead of static). >> >> -- >> Best Regards >> Ashokkumar.G >> 100 Things can not be taken back. 001. A lost opportunity. 010. A spoken >> word. 011. A sped arrow. 100. Time spent. >> >> >> On Thu, Jan 9, 2014 at 7:16 PM, m silverstri >> <michael.j.silverstri@xxxxxxxxx> wrote: >>> >>> I am using 3.10.x kernel tree. My kernel module needs config VIDEOBUF2. >>> >>> That is defined in drivers/media/v4l2-core/Kconfig: >>> >>> # Used by drivers that need Videobuf2 modules >>> config VIDEOBUF2_CORE >>> select DMA_SHARED_BUFFER >>> tristate >>> >>> So I put 'CONFIG_VIDEOBUF2_CORE=y' in my Kernel config file and >>> compile. From the Kconfig it has CONFIG_VIDEOBUF2_CORE has no >>> dependency and I think adding CONFIG_VIDEOBUF2_CORE=y to my kernel >>> config should work. I am modify the right kernel config file since I >>> set other flags like CONFIG_VIDEO_DEV=y and that works. >>> >>> The generated .config does not contain 'CONFIG_VIDEOBUF2_CORE=y' >>> >>> and the compilation fails with a bunch of >>> >>> undefined reference to `vb2_buffer_done' >>> undefined reference to `vb2_buffer_done' >>> undefined reference to `vb2_buffer_done' >>> undefined reference to `vb2_buffer_done' >>> >>> I really appreciate if someone can help me with this. >>> >>> Thank you. >>> >>> _______________________________________________ >>> Kernelnewbies mailing list >>> Kernelnewbies@xxxxxxxxxxxxxxxxx >>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
