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

["Pandiyan, Dhinakaran" <dhinakaran.pandiyan@intel.com>]

On Wed, 2017-01-25 at 07:18 +0100, Daniel Vetter wrote:
> 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@ffwll.ch>
> > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@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.

compute_config is not in the same structure, which made me realize I
should not be referring to compute_config() at all, as it is a helper
for struct intel_encoder. 


-DK
> 
> > +	 * 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
> > 
> 

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