linux-kernel - [PATCH] drm/panel: rm68200: add backlight dependency

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Message-Id: <20180313210015.3344380-1-arnd@arndb.de>
Date:   Tue, 13 Mar 2018 21:59:54 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Philippe CORNU <philippe.cornu@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/panel: rm68200: add backlight dependency

Like many other panel drivers, this one fails to build
when backlight support is disabled:

drivers/gpu/drm/panel/panel-raydium-rm68200.o: In function `rm68200_probe':
panel-raydium-rm68200.c:(.text+0x14a): undefined reference to `devm_of_find_backlight'

This adds the appropriate dependency.

Fixes: 2b7ed18bed1a ("drm/panel: Add support for Raydium RM68200 panel driver")
Signed-off-by: Arnd Bergmann <arnd@...db.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 077bc58c1913..25682ff3449a 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -112,6 +112,7 @@ config DRM_PANEL_RAYDIUM_RM68200
 	tristate "Raydium RM68200 720x1280 DSI video mode panel"
 	depends on OF
 	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
 	help
 	  Say Y here if you want to enable support for Raydium RM68200
 	  720x1280 DSI video mode panel.
-- 
2.9.0