From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 28 Jan 2015 13:48:06 +0000 (+0100)
Subject: drm: panel/simple: add backlight dependency
X-Git-Tag: firefly_0821_release~176^2~2312^2~18
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=83b37eac7c714b0912cd484772388f8e609e74d8;p=firefly-linux-kernel-4.4.55.git

drm: panel/simple: add backlight dependency

The simple panel code uses the backlight interface to
find a device, which fails when backlight is disabled:

drivers/built-in.o: In function `panel_simple_platform_probe':
:(.text+0xd3c48): undefined reference to `of_find_backlight_by_node'

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dave Airlie <airlied@gmail.com>
---

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 84506053a7ca..d84583776d50 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -10,6 +10,7 @@ menu "Display Panels"
 config DRM_PANEL_SIMPLE
 	tristate "support for simple panels"
 	depends on OF
+	depends on BACKLIGHT_CLASS_DEVICE
 	help
 	  DRM panel driver for dumb panels that need at most a regulator and
 	  a GPIO to be powered up. Optionally a backlight can be attached so