Need help in enable configuration when compile Kernel module

[m silverstri]

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 at gmail.com> 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 at 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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>
>