The dependecies for BACKLIGHT_CLASS_DEVICE are defined a bit strange, but it seems one has to always select both BACKLIGHT_CLASS_DEVICE and BACKLIGHT_LCD_SUPPORT to avoid this error: drivers/gpu/drm/tilcdc/tilcdc_panel.c:396: undefined reference to `of_find_backlight_by_node' Cc: Rob Clark <robdclark@xxxxxxxxx> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx Cc: Dave Airlie <airlied@xxxxxxxxxx> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- drivers/gpu/drm/tilcdc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig index e461e99..7a4d101 100644 --- a/drivers/gpu/drm/tilcdc/Kconfig +++ b/drivers/gpu/drm/tilcdc/Kconfig @@ -6,6 +6,7 @@ config DRM_TILCDC select DRM_GEM_CMA_HELPER select VIDEOMODE_HELPERS select BACKLIGHT_CLASS_DEVICE + select BACKLIGHT_LCD_SUPPORT help Choose this option if you have an TI SoC with LCDC display controller, for example AM33xx in beagle-bone, DA8xx, or -- 1.8.1.2 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
