drm_panel_get_modes() should take the connector as an argument [Was: drm/bridge: panel: Implement bridge ...]

[Laurent Pinchart]

Hi Sam,

On Thu, Aug 08, 2019 at 06:52:53PM +0200, Sam Ravnborg wrote:
> Hi Laurent.
> 
> As I said in another mail, you have managed to keep me busy...
> 
> > > I took a look at this - it seems simple:
> > > - Update drm_panel.get_modes() to take drm_connector as argument, and fix
> > >   all callers. All callers already have connector available.
> > > - Drop drm_panel_attach(), drm_panel_detach() and update all callers.
> > >   In reality just drop all code around attach(), detach().
> > >   drm_panel_attach(), drm_panel_detach() will be noops when the
> > >   connector stored in drm_panel is no longer used.
> > > 
> > > The semantic difference is that we supply the connector when we call
> > > drm_panel_get_modes() and not at panel creation time with an drm_panel_attach().
> > > 
> > > So it should be doable without any migration from one world to the other.
> > > 
> > > If someone can say "yes it should be that simple", then I will
> > > give it a spin.
> > 
> > Looking forward to that :-)
> 
> Almost there....
> I have all the preparation patches on dri-devel, with positive
> feedback on most.
> 
> And locally I have updated all get_modes() to take drm_connector as
> argument.
> 
> A few drivers access drm_panel->connector, still need to look into this.
> 
> And then for drm_panel_attach(), drm_panel_detach() - so far they are
> kept but changed to take a drm_device*.
> 
> Just sharing this so you do not jump at it and duplicate the work.
> It will take a little time before I can invest time in this again.
> Will post patches when something is ready for review.

Thanks for the update. Take your time, this isn't blocking me.

-- 
Regards,

Laurent Pinchart