[PATCH v2 7/9] drm: Connector helper function to release atomic state

[Daniel Vetter]

On Tue, Jan 24, 2017 at 03:49:35PM -0800, Dhinakaran Pandiyan wrote:
> Having a ->atomic_release callback is useful to release shared resources
> that get allocated in compute_config().
> 
> Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> ---
>  include/drm/drm_modeset_helper_vtables.h | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
> index 46f5b34..e41b18a 100644
> --- a/include/drm/drm_modeset_helper_vtables.h
> +++ b/include/drm/drm_modeset_helper_vtables.h
> @@ -831,6 +831,21 @@ struct drm_connector_helper_funcs {
>  	 */
>  	struct drm_encoder *(*atomic_best_encoder)(struct drm_connector *connector,
>  						   struct drm_connector_state *connector_state);
> +
> +	/**
> +	 * @atomic_release:
> +	 *
> +	 * This function is used to release shared resources that were
> +	 * previously acquired. For example, resources acquired in
> +	 * encoder->compute_config() can be released by calling this function

@compute_config is the right way to do references within the same struct.

> +	 * from mode_fixup()

Same here.

Patch split up is a bit strange, hence why my review of the design is in
later patches.

Thanks, Daniel

> +	 *
> +	 * NOTE:
> +	 *
> +	 * This function is called in the check phase of an atomic update.
> +	 */
> +	void (*atomic_release)(struct drm_connector *connector,
> +			       struct drm_connector_state *connector_state);
>  };
>  
>  /**
> -- 
> 2.7.4
> 

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