[regression drm/noveau] suspend to ram -> BOOM: exception RIP: drm_calc_vbltimestamp_from_scanoutpos+335

[Ilia Mirkin]

On Wed, Jul 12, 2017 at 7:25 AM, Mike Galbraith <efault at gmx.de> wrote:
> On Wed, 2017-07-12 at 11:55 +0200, Mike Galbraith wrote:
>> On Tue, 2017-07-11 at 14:22 -0400, Ilia Mirkin wrote:
>> >
>> > Some display stuff did change for 4.13 for GM20x+ boards. If it's not
>> > too much trouble, a bisect would be pretty useful.
>>
>> Bisection seemingly went fine, but the result is odd.
>>
>> e98c58e55f68f8785aebfab1f8c9a03d8de0afe1 is the first bad commit
>
> But it really really is bad.  Looking at gitk fork in the road leading
> to it...
>
> 52d9d38c183b drm/sti:fix spelling mistake: "compoment" -> "component" - good
> e4e818cc2d7c drm: make drm_panel.h self-contained                     - good
> 9cf8f5802f39 drm: add missing declaration to drm_blend.h              - good
>
> Before the git highway splits, all is well.  The lane with commits
> works fine at both ends, but e98c58e55f68 is busted.  Merge arfifact?

Hmmm... that tree does not appear to have gotten a v4.12 backmerge at
any point. The last backmerge from Linus as far as I can tell was
v4.11-rc7. Could be an interaction with some out-of-tree change.