From: Arnd Bergmann 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 Signed-off-by: Dave Airlie --- 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