On Fri, Sep 6, 2013 at 5:20 PM, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
> On Friday 06 September 2013 14:43:56 Geert Uytterhoeven wrote:
>> If NO_DMA=y:
>>
>> warning: (... && VIDEO_RENESAS_VSP1 && ...) selects VIDEOBUF2_DMA_CONTIG
>> which has unmet direct dependencies (MEDIA_SUPPORT && HAS_DMA)
>>
>> drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’:
>> drivers/media/v4l2-core/videobuf2-dma-contig.c:202: error: implicit
>> declaration of function ‘dma_mmap_coherent’
>> drivers/media/v4l2-core/videobuf2-dma-contig.c: In function
>> ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:385:
>> error: implicit declaration of function ‘dma_get_sgtable’ make[7]: ***
>> [drivers/media/v4l2-core/videobuf2-dma-contig.o] Error 1
>>
>> VIDEO_RENESAS_VSP1 (which doesn't have a platform dependency) selects
>> VIDEOBUF2_DMA_CONTIG, but the latter depends on HAS_DMA.
>>
>> Make VIDEO_RENESAS_VSP1 depend on HAS_DMA to fix this.
>
> Is there a chance we could fix the Kconfig infrastructure instead ? It warns
> about the unmet dependency, shouldn't it disallow selecting the driver in the
> first place ? I have a vague feeling that this topic has been discussed before
> though.
This has come up several times before.
Unfortunately "select" was "designed" to circumvent all dependencies of
the target symbol.
> If that's not possible,
>
>> Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
>
> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
>> ---
>> drivers/media/platform/Kconfig | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
>> index 8068d7b..fbc0611 100644
>> --- a/drivers/media/platform/Kconfig
>> +++ b/drivers/media/platform/Kconfig
>> @@ -212,7 +212,7 @@ config VIDEO_SH_VEU
>>
>> config VIDEO_RENESAS_VSP1
>> tristate "Renesas VSP1 Video Processing Engine"
>> - depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
>> + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && HAS_DMA
>> select VIDEOBUF2_DMA_CONTIG
>> ---help---
>> This is a V4L2 driver for the Renesas VSP1 video processing engine.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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