[PATCH 02/19] drm/atomic-helper: Make crtc helper funcs optional

[Lisovskiy, Stanislav]

On Mon, 2019-07-08 at 15:53 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Allow drivers to call drm_atomic_helper_check_modeset() without
> having the crtc helper funcs specified. i915 doesn't need those
> anymore.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/drm_atomic_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
> b/drivers/gpu/drm/drm_atomic_helper.c
> index aa16ea17ff9b..fb2ce692ae5b 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -481,7 +481,7 @@ mode_fixup(struct drm_atomic_state *state)
>  			continue;
>  
>  		funcs = crtc->helper_private;
> -		if (!funcs->mode_fixup)
> +		if (!funcs || !funcs->mode_fixup)
>  			continue;
>  
>  		ret = funcs->mode_fixup(crtc, &new_crtc_state->mode,

But it still won't allow to call anything from here, if no funcs or no
mode_fixup is specified. Anyway seems to be a good idea to check both
funcs or funcs->mode_fixup being NULL, just don't get the commit
message a bit :)


- Stanislav