From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 28 Feb 2018 14:40:48 +0100
Subject: tinydrm: add backlight dependency
Git-commit: 7628166d5e2883e4cdd142b99863d29d411a81b2
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Calling devm_of_find_backlight directly means we get a link failure
without CONFIG_BACKLIGHT_CLASS_DEVICE:
drivers/gpu/drm/tinydrm/mi0283qt.o: In function `mi0283qt_probe':
mi0283qt.c:(.text+0x684): undefined reference to `devm_of_find_backlight'
This adds an explicit Kconfig dependency for it. While I did not
observe that failure for st7735r, I assume the same change is needed
there for the same reason.
Fixes: d1a2e7004b5e ("drm/tinydrm: Replace tinydrm_of_find_backlight with of_find_backlight")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180228134111.2042877-1-arnd@arndb.de
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/tinydrm/Kconfig | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/tinydrm/Kconfig
+++ b/drivers/gpu/drm/tinydrm/Kconfig
@@ -23,6 +23,7 @@ config TINYDRM_ILI9225
config TINYDRM_MI0283QT
tristate "DRM support for MI0283QT"
depends on DRM_TINYDRM && SPI
+ depends on BACKLIGHT_CLASS_DEVICE
select TINYDRM_MIPI_DBI
help
DRM driver for the Multi-Inno MI0283QT display panel
@@ -54,6 +55,7 @@ config TINYDRM_ST7586
config TINYDRM_ST7735R
tristate "DRM support for Sitronix ST7735R display panels"
depends on DRM_TINYDRM && SPI
+ depends on BACKLIGHT_CLASS_DEVICE
select TINYDRM_MIPI_DBI
help
DRM driver Sitronix ST7735R with one of the following LCDs: