[PATCH v7 01/12] drm/bridge: Add a drm_bridge_state object

[Boris Brezillon]

On Wed, 22 Jan 2020 12:16:49 +0100
Boris Brezillon <boris.brezillon at collabora.com> wrote:

> +
> +/**
> + * drm_atomic_get_bridge_state - get bridge state
> + * @state: global atomic state object
> + * @bridge: bridge to get state object for
> + *
> + * This function returns the bridge state for the given bridge, allocating it
> + * if needed. It will also grab the relevant bridge lock to make sure that the
> + * state is consistent.
> + *
> + * Returns:
> + *
> + * Either the allocated state or the error code encoded into the pointer. When
> + * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
> + * entire atomic sequence must be restarted.
> + */
> +struct drm_bridge_state *
> +drm_atomic_get_bridge_state(struct drm_atomic_state *state,
> +			    struct drm_bridge *bridge)
> +{
> +	struct drm_private_state *obj_state;
> +
> +	obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
> +	if (IS_ERR(obj_state))
> +		return ERR_CAST(obj_state);
> +
> +	return drm_priv_to_bridge_state(obj_state);
> +}
> +EXPORT_SYMBOL(drm_atomic_get_bridge_state);
> +
> +/**
> + * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
> + * @state: global atomic state object
> + * @bridge: bridge to grab
> + *
> + * This function returns the old bridge state for the given bridge, or NULL if
> + * the bridge is not part of the global atomic state.
> + */
> +struct drm_bridge_state *
> +drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
> +				struct drm_bridge *bridge)
> +{
> +	struct drm_private_state *obj_state;
> +
> +	obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
> +	if (!obj_state)
> +		return NULL;
> +
> +	return drm_priv_to_bridge_state(obj_state);
> +}
> +EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
> +
> +/**
> + * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
> + * @state: global atomic state object
> + * @bridge: bridge to grab
> + *
> + * This function returns the new bridge state for the given bridge, or NULL if
> + * the bridge is not part of the global atomic state.
> + */
> +struct drm_bridge_state *
> +drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
> +				struct drm_bridge *bridge)
> +{
> +	struct drm_private_state *obj_state;
> +
> +	obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
> +	if (!obj_state)
> +		return NULL;
> +
> +	return drm_priv_to_bridge_state(obj_state);
> +}
> +EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
> +

Oops, I placed those helpers in the #ifdef CONFIG_DEBUG_FS section.

>  #endif