From: YueHaibing <yuehaib...@huawei.com>

[ Upstream commit f4cc743a98136df3c3763050a0e8223b52d9a960 ]

If DRM_LVDS_ENCODER=y but CONFIG_DRM_KMS_HELPER=m,
build fails:

drivers/gpu/drm/bridge/lvds-encoder.o: In function `lvds_encoder_probe':
lvds-encoder.c:(.text+0x155): undefined reference to `devm_drm_panel_bridge_add'

Reported-by: Hulk Robot <hul...@huawei.com>
Fixes: dbb58bfd9ae6 ("drm/bridge: Fix lvds-encoder since the panel_bridge 
rework.")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
Reviewed-by: Neil Armstrong <narmstr...@baylibre.com>
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
Link: 
https://patchwork.freedesktop.org/patch/msgid/20190729071216.27488-1-yuehaib...@huawei.com
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 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 ee777469293a4..cc62603b87c59 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -48,6 +48,7 @@ config DRM_DUMB_VGA_DAC
 config DRM_LVDS_ENCODER
        tristate "Transparent parallel to LVDS encoder support"
        depends on OF
+       select DRM_KMS_HELPER
        select DRM_PANEL_BRIDGE
        help
          Support for transparent parallel to LVDS encoders that don't require
-- 
2.20.1

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