[PATCH v6 3/5] fbdev: Disable sysfb device registration when removing conflicting FBs

[Xi Ruoyao]

On Mon, 2022-07-04 at 17:36 +0800, Xi Ruoyao wrote:

> > Yes, please do. Either with CONFIG_SYSFB_SIMPLEFB disabled and CONFIG_FB_EFI
> > enabled (so that "efi-framebuffer" is registered and efifb probed) or with
> > CONFIG_SYSFB_SIMPLEFB but CONFIG_FB_SIMPLE enabled (so "simple-framebuffer
> > is used too but with simplefb instead of simpledrm).
> >  
> > I'm not able to reproduce, it would be useful to have another data point.
> 
> Also happening for me with CONFIG_SYSFB_SIMPLEFB, on a Intel Core i7-
> 1065G7 (with iGPU).
> 
> Reverting this commit on top of 5.19-rc5 "fixes" the issue.

With CONFIG_SYSFB_SIMPLEFB and CONFIG_FB_SIMPLE enabled, there is no
issue.

I guess it's something going wrong on a "drm -> drm" pass over.  For now
I'll continue to use simpledrm with this commit reverted.