Re: [REGRESSION] omapdrm/N900 display broken

[Ivaylo Dimitrov]

Hi,

On 27.11.20 г. 15:10 ч., Ivaylo Dimitrov wrote:
> On 27.11.20 г. 13:45 ч., Tomi Valkeinen wrote:
> > On 27/11/2020 01:17, Ivaylo Dimitrov wrote:
> > > Hi Tomi,
> > >
> > > On 26.11.20 г. 16:11 ч., Tomi Valkeinen wrote:
> > > > Hi Aaro, Ivaylo,
> > > >
> > > > On 24/11/2020 23:03, Ivaylo Dimitrov wrote:
> > > >
> > > > > Is there any progress on the issue? I tried 5.9.1 and still nothing 
> > > > > displayed.
> > > >
> > > > Can you test the attached patch?
> > >
> > > With this patch I don't see oops that Aaro reported, so:
> > >
> > > Tested-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx>
> > >
> > > Seems to fix the particular issue, however, now we get another oops. 
> > > As this is not upstream kernel
> > > but one with PVR related patches, I will try again with vanilla 5.9.
> > >
> > > Just in case oops rings any bells (the line in question is
> > > https://github.com/maemo-leste/droid4-linux/blob/maemo-5.9/drivers/gpu/drm/omapdrm/omap_gem.c#L801) 
> >
> > Do the PVR patches touch omapdrm? The call stack looks like normal 
> > boot time probing stuff, not
> > something happening later (possibly from PVR).
>
> pvr driver is not even enabled in that particular config, however, I see 
> "HACK: drm/omap: Add omapdrm plugin API" patch in the tree that touches 
> omap-gem.c, I don't really want to just create some noise for problems 
> that are created by out-of-tree patches. And yeah, it looks like a 
> normal boot time probing stuff. As soon as I have some spare time 
> (hopefully later today) I will try vanilla 5.9.x with 
> omap2plus_defconfig and will report.

With 5.9.11 and the patch on top, n900 boots fine, albeit display 
remains blank, could be related to brightness, we're still investigating.

Thanks and regards,
Ivo