4.14-stable review patch.  If anyone has any objections, please let me know.


From: Arnd Bergmann <a...@arndb.de>

[ Upstream commit 499ec0ed5eb2f6a7fcaab2dd66ffc5993484bda9 ]

The new backlight code causes a link failure when backlight
support itself is disabled:

drivers/gpu/drm/omapdrm/displays/panel-dpi.o: In function `panel_dpi_probe_of':
panel-dpi.c:(.text+0x35c): undefined reference to `of_find_backlight_by_node'

This adds a Kconfig dependency like we have for the other OMAP
display targets.

Fixes: 39135a305a0f ("drm/omap: displays: panel-dpi: Support for handling 
backlight devices")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
 drivers/gpu/drm/omapdrm/displays/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/omapdrm/displays/Kconfig
+++ b/drivers/gpu/drm/omapdrm/displays/Kconfig
@@ -35,6 +35,7 @@ config DRM_OMAP_CONNECTOR_ANALOG_TV
        tristate "Generic DPI panel"
+       depends on BACKLIGHT_CLASS_DEVICE
          Driver for generic DPI panels.

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