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 <hulkci@xxxxxxxxxx> Fixes: 6b2265975239 ("media: staging: tegra-vde: Fix build error") Fixes: b301f8de1925 ("media: staging: media: tegra-vde: Add IOMMU support") Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> --- 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 -- 2.7.4