From: Arnd Bergmann <arnd@arndb.de>
To: Thierry Reding <thierry.reding@gmail.com>,
        David Airlie <airlied@linux.ie>
Cc: Arnd Bergmann <arnd@arndb.de>, Vinay Simha BN <simhavcs@gmail.com>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Hoegeun Kwon <hoegeun.kwon@samsung.com>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] drm/panel: S6E3HA2 needs backlight code
Date: Wed, 19 Apr 2017 19:59:18 +0200
Message-Id: <20170419175939.189098-2-arnd@arndb.de>
In-Reply-To: <20170419175939.189098-1-arnd@arndb.de>
References: <20170419175939.189098-1-arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 980
Lines: 27

The new S6E3HA2 driver fails to link when backlight is disabled:

ERROR: "backlight_device_register" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined!
ERROR: "backlight_device_unregister" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined!

This adds a Kconfig dependency like we have it for some other panel drivers.

Fixes: ed29f9426d9b ("drm/panel: Add support for S6E3HA2 panel driver on TM2 board")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 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 3e29a9903303..6eb9774284df 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -66,6 +66,7 @@ config DRM_PANEL_SAMSUNG_S6E3HA2
 	tristate "Samsung S6E3HA2 DSI video mode panel"
 	depends on OF
 	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
 	select VIDEOMODE_HELPERS
 
 config DRM_PANEL_SAMSUNG_S6E8AA0
-- 
2.9.0