Hello Yue,
26.08.2019 16:31, YueHaibing пишет:
> If COMPILE_TEST is y and IOMMU_SUPPORT is n, selecting TEGRA_VDE
> to m will set IOMMU_IOVA to m, this fails the building of
> TEGRA_HOST1X and DRM_TEGRA which is y like this:
>
> drivers/gpu/host1x/cdma.o: In function `host1x_cdma_init':
> cdma.c:(.text+0x66c): undefined reference to `alloc_iova'
> cdma.c:(.text+0x698): undefined reference to `__free_iova'
>
> drivers/gpu/drm/tegra/drm.o: In function `tegra_drm_unload':
> drm.c:(.text+0xeb0): undefined reference to `put_iova_domain'
> drm.c:(.text+0xeb4): undefined reference to `iova_cache_put'
>
> Reported-by: Hulk Robot <hul...@huawei.com>
> Fixes: 6b2265975239 ("media: staging: tegra-vde: Fix build error")
> Fixes: b301f8de1925 ("media: staging: media: tegra-vde: Add IOMMU support")
> Signed-off-by: YueHaibing <yuehaib...@huawei.com>
> ---
> drivers/staging/media/tegra-vde/Kconfig | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/media/tegra-vde/Kconfig
> b/drivers/staging/media/tegra-vde/Kconfig
> index ba49ea5..a41d30c 100644
> --- a/drivers/staging/media/tegra-vde/Kconfig
> +++ b/drivers/staging/media/tegra-vde/Kconfig
> @@ -1,9 +1,9 @@
> # SPDX-License-Identifier: GPL-2.0
> config TEGRA_VDE
> tristate "NVIDIA Tegra Video Decoder Engine driver"
> - depends on ARCH_TEGRA || COMPILE_TEST
> + depends on ARCH_TEGRA
> select DMA_SHARED_BUFFER
> - select IOMMU_IOVA if (IOMMU_SUPPORT || COMPILE_TEST)
> + select IOMMU_IOVA if IOMMU_SUPPORT
> select SRAM
> help
> Say Y here to enable support for the NVIDIA Tegra video decoder
>
What about this variant:
select IOMMU_IOVA if (IOMMU_SUPPORT && !COMPILE_TEST)
which should fix the building and preserve compile-testing.
It shouldn't matter at all whether IOVA is enabled or not for
compile-testing of the driver.
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