[PATCH] drm/modes: add non-OF stub for of_get_drm_display_mode

[Daniel Vetter]

On Fri, Jan 08, 2021 at 11:13:43AM +0100, Philipp Zabel wrote:
> If CONFIG_OF is disabled, of_get_drm_display_mode is not compiled in,
> and drivers using it fail to build:
> 
>   ld: drivers/gpu/drm/imx/parallel-display.o: in function `imx_pd_connector_get_modes':
>   parallel-display.c:(.text+0x8d): undefined reference to `of_get_drm_display_mode'
> 
> Add an inline stub so they can be build-tested with non-OF
> configurations.
> 
> Reported-by: Randy Dunlap <rdunlap at infradead.org>
> Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>

Makes sense, we have dummy functions for !CONFIG_OF for all the others
already.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Cheers, Daniel

> ---
>  include/drm/drm_modes.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> index a0d79d1c51e2..29ba4adf0c53 100644
> --- a/include/drm/drm_modes.h
> +++ b/include/drm/drm_modes.h
> @@ -461,9 +461,19 @@ void drm_display_mode_from_videomode(const struct videomode *vm,
>  void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
>  				   struct videomode *vm);
>  void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
> +
> +#if defined(CONFIG_OF)
>  int of_get_drm_display_mode(struct device_node *np,
>  			    struct drm_display_mode *dmode, u32 *bus_flags,
>  			    int index);
> +#else
> +static inline int of_get_drm_display_mode(struct device_node *np,
> +					  struct drm_display_mode *dmode,
> +					  u32 *bus_flags, int index)
> +{
> +	return -EINVAL;
> +}
> +#endif
>  
>  void drm_mode_set_name(struct drm_display_mode *mode);
>  int drm_mode_vrefresh(const struct drm_display_mode *mode);
> -- 
> 2.20.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch