[Intel-gfx] [PATCH] drm/atomic: add drm_atomic_get_existing_*_state helpers

[Daniel Vetter]

On Wed, May 13, 2015 at 10:37:25AM +0200, Maarten Lankhorst wrote:
> There are cases where we want to test if a given object is
> part of the state, but don't want to add them if they're not.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Yeah makes sense to wrap these. Applied to topic/drm-misc, thanks.
-Daniel

> ---
>  drivers/gpu/drm/drm_atomic.c | 18 +++++++---------
>  include/drm/drm_atomic.h     | 50 ++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 58 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 88259057f87b..47364f244dc0 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -263,13 +263,12 @@ struct drm_crtc_state *
>  drm_atomic_get_crtc_state(struct drm_atomic_state *state,
>  			  struct drm_crtc *crtc)
>  {
> -	int ret, index;
> +	int ret, index = drm_crtc_index(crtc);
>  	struct drm_crtc_state *crtc_state;
>  
> -	index = drm_crtc_index(crtc);
> -
> -	if (state->crtc_states[index])
> -		return state->crtc_states[index];
> +	crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
> +	if (crtc_state)
> +		return crtc_state;
>  
>  	ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
>  	if (ret)
> @@ -397,13 +396,12 @@ struct drm_plane_state *
>  drm_atomic_get_plane_state(struct drm_atomic_state *state,
>  			  struct drm_plane *plane)
>  {
> -	int ret, index;
> +	int ret, index = drm_plane_index(plane);
>  	struct drm_plane_state *plane_state;
>  
> -	index = drm_plane_index(plane);
> -
> -	if (state->plane_states[index])
> -		return state->plane_states[index];
> +	plane_state = drm_atomic_get_existing_plane_state(state, plane);
> +	if (plane_state)
> +		return plane_state;
>  
>  	ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
>  	if (ret)
> diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> index 953af6bd7430..6445970535ec 100644
> --- a/include/drm/drm_atomic.h
> +++ b/include/drm/drm_atomic.h
> @@ -59,6 +59,56 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
>  		struct drm_connector_state *state, struct drm_property *property,
>  		uint64_t val);
>  
> +/**
> + * drm_atomic_get_existing_crtc_state - get crtc state, if it exists
> + * @state: global atomic state object
> + * @crtc: crtc to grab
> + *
> + * This function returns the crtc state for the given crtc, or NULL
> + * if the crtc is not part of the global atomic state.
> + */
> +static inline struct drm_crtc_state *
> +drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
> +				   struct drm_crtc *crtc)
> +{
> +	return state->crtc_states[drm_crtc_index(crtc)];
> +}
> +
> +/**
> + * drm_atomic_get_existing_plane_state - get plane state, if it exists
> + * @state: global atomic state object
> + * @plane: plane to grab
> + *
> + * This function returns the plane state for the given plane, or NULL
> + * if the plane is not part of the global atomic state.
> + */
> +static inline struct drm_plane_state *
> +drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
> +				    struct drm_plane *plane)
> +{
> +	return state->plane_states[drm_plane_index(plane)];
> +}
> +
> +/**
> + * drm_atomic_get_existing_connector_state - get connector state, if it exists
> + * @state: global atomic state object
> + * @connector: connector to grab
> + *
> + * This function returns the connector state for the given connector,
> + * or NULL if the connector is not part of the global atomic state.
> + */
> +static inline struct drm_connector_state *
> +drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
> +					struct drm_connector *connector)
> +{
> +	int index = drm_connector_index(connector);
> +
> +	if (index >= state->num_connector)
> +		return NULL;
> +
> +	return state->connector_states[index];
> +}
> +
>  int __must_check
>  drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
>  			      struct drm_crtc *crtc);
> -- 
> 2.1.0
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

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