linux-kernel - [PATCH] drm/omap: displays: panel-dpi: add backlight dependency

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Message-Id: <20171005120651.376485-1-arnd@arndb.de>
Date:   Thu,  5 Oct 2017 14:06:41 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Tomi Valkeinen <tomi.valkeinen@...com>,
        David Airlie <airlied@...ux.ie>
Cc:     Arnd Bergmann <arnd@...db.de>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/omap: displays: panel-dpi: add backlight dependency

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@...db.de>
---
 drivers/gpu/drm/omapdrm/displays/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/Kconfig b/drivers/gpu/drm/omapdrm/displays/Kconfig
index c226da145fb3..a349cb61961e 100644
--- 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.
 
-- 
2.9.0