[PATCH V2 3/5] drm/vkms: Add atomic helpers functions

[Daniel Vetter]

On Thu, Jun 21, 2018 at 09:16:41AM -0300, Rodrigo Siqueira wrote:
> This patch adds the struct drm_crtc_helper_funcs with simple
> atomic_check and atomic_enable functions.
> 
> Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo at gmail.com>
> ---
>  drivers/gpu/drm/vkms/vkms_crtc.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
> index bf76cd39ece7..84cc05506b09 100644
> --- a/drivers/gpu/drm/vkms/vkms_crtc.c
> +++ b/drivers/gpu/drm/vkms/vkms_crtc.c
> @@ -19,6 +19,22 @@ static const struct drm_crtc_funcs vkms_crtc_funcs = {
>  	.atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
>  };
>  
> +static int vkms_crtc_atomic_check(struct drm_crtc *crtc,
> +				  struct drm_crtc_state *state)
> +{
> +	return 0;
> +}
> +
> +static void vkms_crtc_atomic_enable(struct drm_crtc *crtc,
> +				    struct drm_crtc_state *old_state)
> +{
> +}

Please don't add empty functions when not requird (these callbacks should
all be optional). Also I'd squash this patch in with the patch adding the
vblank hrtimer, splitting this out doesn't really make sense.
-Daniel
> +
> +static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
> +	.atomic_check  = vkms_crtc_atomic_check,
> +	.atomic_enable = vkms_crtc_atomic_enable,
> +};
> +
>  int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
>  		   struct drm_plane *primary, struct drm_plane *cursor)
>  {
> @@ -31,5 +47,7 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
>  		return ret;
>  	}
>  
> +	drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
> +
>  	return ret;
>  }
> -- 
> 2.17.1
> 

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