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@gmail.com
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.
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