[PATCH] drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP

[Thomas Zimmermann]

As reported in [1], DRM_PANEL_EDP depends on DRM_DP_HELPER. Select
the option to fix the build failure. The issue has been reported
before, when DisplayPort helpers where hidden behind the option
CONFIG_DRM_KMS_HELPER. [2]

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Fixes: adb9d5a2cc77 ("drm/dp: Move DisplayPort helpers into separate helper module")
Fixes: 5f04e7ce392d ("drm/panel-edp: Split eDP panels out of panel-simple")
Reported-by: Naresh Kamboju <naresh.kamboju at linaro.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Lyude Paul <lyude at redhat.com>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: dri-devel at lists.freedesktop.org
---
 drivers/gpu/drm/panel/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 434c2861bb40..0aec5a10b064 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -106,6 +106,7 @@ config DRM_PANEL_EDP
 	depends on PM
 	select VIDEOMODE_HELPERS
 	select DRM_DP_AUX_BUS
+	select DRM_DP_HELPER
 	help
 	  DRM panel driver for dumb eDP panels that need at most a regulator and
 	  a GPIO to be powered up. Optionally a backlight can be attached so
-- 
2.34.1