[PATCH v5 01/18] drm/bridge: Select VIDEOMODE_HELPERS for DRM_OF_DISPLAY_MODE_BRIDGE

[Damon Ding]

The of-display-mode-bridge driver calls of_get_drm_display_mode(),
which is provided when VIDEOMODE_HELPERS is selected.  So far the
dependency has been satisfied by the users selecting
VIDEOMODE_HELPERS themselves (e.g. the Exynos and i.MX DRM drivers),
which breaks as soon as a user does not, resulting in undefined
references to of_get_drm_display_mode() at link time.

Select VIDEOMODE_HELPERS from DRM_OF_DISPLAY_MODE_BRIDGE, so that the
dependency is always satisfied.

Signed-off-by: Damon Ding <damon.ding at rock-chips.com>
---
 drivers/gpu/drm/bridge/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index c7da6b02d7b6..f717523014e8 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -266,6 +266,7 @@ config DRM_NXP_PTN3460
 config DRM_OF_DISPLAY_MODE_BRIDGE
 	tristate
 	depends on DRM_BRIDGE && OF
+	select VIDEOMODE_HELPERS
 	help
 	  This is a DRM bridge implementation that uses of_get_drm_display_mode
 	  to acquire display mode.
-- 
2.34.1