On Wed, Feb 28, 2018 at 02:40:48PM +0100, Arnd Bergmann wrote:
> 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 <a...@arndb.de>
Applied to drm-misc-next, thanks!
Sean
> ---
> drivers/gpu/drm/tinydrm/Kconfig | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/tinydrm/Kconfig b/drivers/gpu/drm/tinydrm/Kconfig
> index 13339be843bc..4592a5e3f20b 100644
> --- 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:
> --
> 2.9.0
>
--
Sean Paul, Software Engineer, Google / Chromium OS
