When CONFIG_V4L2 is built as a loadable module, the new video mux driver fails to link as built-in code:
drivers/media/platform/video-mux.o: In function `video_mux_remove': video-mux.c:(.text+0x24): undefined reference to `v4l2_async_unregister_subdev' drivers/media/platform/video-mux.o: In function `video_mux_probe': video-mux.c:(.text+0x800): undefined reference to `v4l2_subdev_init' video-mux.c:(.text+0xa10): undefined reference to `v4l2_async_register_subdev' This makes it use the same Kconfig dependency as all the other users of the VIDEO_V4L2_SUBDEV_API symbol. Fixes: 68803ad4522f ("[media] platform: add video-multiplexer subdevice driver") Cc: Sascha Hauer <s.ha...@pengutronix.de> Cc: Philipp Zabel <p.za...@pengutronix.de> Signed-off-by: Arnd Bergmann <a...@arndb.de> --- Cc: Russell King <li...@armlinux.org.uk> Cc: Steve Longerbeam <steve_longerb...@mentor.com> Cc: Sakari Ailus <sakari.ai...@linux.intel.com> Cc: Pavel Machek <pa...@ucw.cz> --- 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 fb1fa0b82077..20179eb8f31e 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -76,7 +76,7 @@ config VIDEO_M32R_AR_M64278 config VIDEO_MUX tristate "Video Multiplexer" - depends on OF && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER + depends on VIDEO_V4L2 && OF && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER select REGMAP help This driver provides support for N:1 video bus multiplexers. -- 2.9.0