[PATCHv3] modesetting: Update fb_id from shadow allocate and destroy if not set

[Tony Lindgren]

* Michel Dänzer <michel at daenzer.net> [180706 07:48]:
> On 2018-07-05 05:42 PM, Tony Lindgren wrote:
> > Hi,
> > 
> > * Michel Dänzer <michel at daenzer.net> [180705 14:21]:
> >>
> >> This uses the same damage region for all framebuffers, which is
> >> generally not correct for drmmode_crtc->rotate_fb_id. The coordinate
> >> offset, rotation and reflection need to be taken into account for that.
> > 
> > Hmm OK. I thought we just need to refresh it we have
> > rotate_fb_id.
> > 
> > Unfortunately I have no idea what the check here might be
> > for the variables above.. Sounds like it might leave out
> > some pointless updates though :) Care to describe a bit
> > more or ideally even provide a patch to test?
> 
> The simplest solution is probably to use separate damage records
> attached to the per-CRTC rotation pixmaps.

Sorry but I still have no idea what needs to be checked
with rotate_fb_id and rotation pixmaps before updating
the display..

Regards,

Tony