With CONFIG_V4L2=m and VIDEO_SAMSUNG_EXYNOS4_IS=y, we can select the individual drivers as built-in code when that should not be possible: drivers/built-in.o: In function `s5pcsis_set_fmt': policy.c:(.text+0x13afdc): undefined reference to `v4l_bound_align_image' drivers/built-in.o: In function `s5pcsis_probe': policy.c:(.text+0x13b440): undefined reference to `v4l2_of_parse_endpoint' policy.c:(.text+0x13b72c): undefined reference to `v4l2_subdev_init' Changing VIDEO_SAMSUNG_EXYNOS4_IS to tristate means that the dependency from CONFIG_V4L2 propates to the individual Kconfig symbols and they can only be built as loadable modules if V4L2 or any other of the dependencies itself is a module. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> diff --git a/drivers/media/platform/exynos4-is/Kconfig b/drivers/media/platform/exynos4-is/Kconfig index 40423c6c5324..57d42c6172c5 100644 --- a/drivers/media/platform/exynos4-is/Kconfig +++ b/drivers/media/platform/exynos4-is/Kconfig @@ -1,6 +1,6 @@ config VIDEO_SAMSUNG_EXYNOS4_IS - bool "Samsung S5P/EXYNOS4 SoC series Camera Subsystem driver" + tristate "Samsung S5P/EXYNOS4 SoC series Camera Subsystem driver" depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API depends on ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST depends on OF && COMMON_CLK -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
