backlight - chicken and egg challenge

[Sam Ravnborg]

> >
> > So the open question is how to fix this dependency challenge?
> >
> > 1) Drop the generic backlight driver and implement all pwm/backlight
> >    handling in the driver.
> > 2) Re-introduce the MFD driver.
> > 3) ?
> >
> > Any good ideas?
> 
> component.c should be able to cope. The driver that matches for the
> physical/platform device register the pwm thing, plus a component (for
> the drm driver, you can start with initializing the drm_device
> already, except for the panel). The panel registers the other
> component. the component master then does the final step of
> registering the overall drm_device.
> 
> Should all work, only bit you might need is a bit of
> drm_panel/component.c integration. Iirc there's been discussions about
> that, but no idea where they are stuck.

Sound reasonable, I will try to look into this.
If anyone have pointers to the drm_panel/component.c integration
discussions I expect this would be a good help.

	Sam