> > Adding drm_connector and drm_encoder pointers in > > drm_writeback_connector > > Why? The elements of struct drm_writeback_connector are struct drm_writeback_connector { Struct drm_connector base; Struct drm_encoder encoder; Similarly the elements of intel_encoder and intel_connector are struct intel_encoder { Struct drm_encoder base; Struct intel_connector { Struct drm_connector base; The function drm_writeback_connector_init() will initialize the drm_connector and drm_encoder and attach them as well. Since the drm_connector/encoder are both struct in drm_writeback_connector and intel_connector/encoder, one of them should be a pointer, else both will be pointing to 2 separate instances. Usually the struct defined in drm framework pointing to any struct will be pointer and allocating them and initialization will be done with the users. Like struct drm_connector and drm_encoder are part of drm framework and the users of these such as i915 have included them in their struct intel_connector and intel_encoder. Likewise struct drm_writeback_connector is a special connector and hence is not a user of drm_connector and hence this should be pointers. > > We can all read the code, the commit message should mostly be about the > *why*. > > Also, drm changes should Cc: dri-devel mailing list. Sure we will add this in Cc in the next series of patches Thanks, Suraj Kandpal