If DRM_RCAR_MIPI_DSI is enabled, then DRM_RCAR_DU should depend on DRM_RCAR_MIPI_DSI to prevent DRM_RCAR_MIPI_DSI=m and DRM_RCAR_DU=y, which causes build errors: aarch64-linux-ld: drivers/gpu/drm/rcar-du/rcar_du_crtc.o: in function `rcar_du_crtc_atomic_enable': drivers/gpu/drm/rcar-du/rcar_du_crtc.c:760: undefined reference to `rcar_mipi_dsi_pclk_enable' aarch64-linux-ld: drivers/gpu/drm/rcar-du/rcar_du_crtc.o: in function `rcar_du_crtc_atomic_disable': drivers/gpu/drm/rcar-du/rcar_du_crtc.c:806: undefined reference to `rcar_mipi_dsi_pclk_disable' Fixes: 957fe62d7d15 ("drm: rcar-du: Fix DSI enable & disable sequence") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Yu Liao <liaoyu15@xxxxxxxxxx> --- drivers/gpu/drm/rcar-du/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig index c959e8c6be7d..b256ff962893 100644 --- a/drivers/gpu/drm/rcar-du/Kconfig +++ b/drivers/gpu/drm/rcar-du/Kconfig @@ -4,6 +4,7 @@ config DRM_RCAR_DU depends on DRM && OF depends on ARM || ARM64 depends on ARCH_RENESAS || COMPILE_TEST + depends on DRM_RCAR_MIPI_DSI || DRM_RCAR_MIPI_DSI=n select DRM_KMS_HELPER select DRM_GEM_DMA_HELPER select VIDEOMODE_HELPERS -- 2.25.1