From 499ec0ed5eb2f6a7fcaab2dd66ffc5993484bda9 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 5 Oct 2017 14:06:41 +0200
Subject: [PATCH] drm/omap: displays: panel-dpi: add backlight dependency
Git-commit: 499ec0ed5eb2f6a7fcaab2dd66ffc5993484bda9
Patch-mainline: v4.15-rc2
References: bsc#1051510

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 <arnd@arndb.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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
 
 config DRM_OMAP_PANEL_DPI
 	tristate "Generic DPI panel"
+	depends on BACKLIGHT_CLASS_DEVICE
 	help
 	  Driver for generic DPI panels.