[Bug 106431] On ASUS A8JN laptop with G72M GPU dmesg is flooded with error messages

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=106431

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |daniel at ffwll.ch

--- Comment #2 from Daniel Vetter <daniel at ffwll.ch> ---
Three ways to fix this:

- open-code the old behaviour (without the warning) again in nouveau, just to
shut it up.

- don't register vblanks with the drm core (i.e. no call to drm_vblank_init) on
pre-tesla if the hw/driver can't do it since it's just a lie apparently.
According to following commit at least:

commit af4870e406126b7ac0ae7c7ce5751f25ebe60f28
Author: Mario Kleiner <mario.kleiner.de at gmail.com>
Date:   Tue May 13 00:42:08 2014 +0200

    drm/nouveau/kms/nv04-nv40: fix pageflip events via special case.

- fix up the underlying issue of sending the vblank events before they happen.
Old intel hw is similar in that the pageflip irq from the hw happens when the
flip arms, not when it completes at the next vblank. We solve that by enabling
the corresponding vblank, and from the flip handler stuff the event someplace
where the vblank handler can pick it up. Then on the next vblank we'll send out
the event (knowing the timestamp to be accurate) and drop the vblank reference.

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