Hi Yue,
On Mon, Jul 22, 2019 at 09:47:49PM +0800, YueHaibing wrote:
> If IOMMU_SUPPORT is not set, ipu3 driver may select IOMMU_IOVA to m.
> But for many drivers, they use "select IOMMU_IOVA if IOMMU_SUPPORT"
> in the Kconfig, for example, CONFIG_TEGRA_VDE is set to y but IOMMU_IOVA
> is m, then the building fails like this:
>
> drivers/staging/media/tegra-vde/iommu.o: In function `tegra_vde_iommu_map':
> iommu.c:(.text+0x41): undefined reference to `alloc_iova'
> iommu.c:(.text+0x56): undefined reference to `__free_iova'
>
> Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
> Fixes: 7fc7af649ca7 ("media: staging/intel-ipu3: Add imgu top level pci device driver")
> Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
> ---
> drivers/staging/media/ipu3/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/ipu3/Kconfig b/drivers/staging/media/ipu3/Kconfig
> index 4b51c67..b7df18f 100644
> --- a/drivers/staging/media/ipu3/Kconfig
> +++ b/drivers/staging/media/ipu3/Kconfig
> @@ -4,7 +4,7 @@ config VIDEO_IPU3_IMGU
> depends on PCI && VIDEO_V4L2
> depends on MEDIA_CONTROLLER && VIDEO_V4L2_SUBDEV_API
> depends on X86
> - select IOMMU_IOVA
> + select IOMMU_IOVA if IOMMU_SUPPORT
This doesn't seem right: the ipu3-cio2 driver needs IOMMU_IOVA
independently of IOMMU_SUPPORT.
Looking at tegra-vde, it seems to depend on IOMMU_SUPPORT but that's not
declared in its Kconfig entry. I wonder if adding that would be the right
way to fix this.
Cc'ing the IOMMU list.
> select VIDEOBUF2_DMA_SG
> help
> This is the Video4Linux2 driver for Intel IPU3 image processing unit,
--
Regards,
Sakari Ailus
sakari.ailus@xxxxxxxxxxxxxxx
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