Fix for vblank on nvc0

[Sven Joachim]

On 2012-11-11 21:25 +0100, Maarten Lankhorst wrote:

> Op 11-11-12 19:35, Marcin Slusarz schreef:
>> On Sun, Nov 11, 2012 at 07:26:17PM +0100, Marcin Slusarz wrote:
>>> On Tue, Nov 06, 2012 at 07:30:00PM +0100, Maarten Lankhorst wrote:
>>>>
>>>> Op 06-11-12 15:48, Kelly Doran schreef:
>>>>> The vblank on nvc0 was not working correctly and would freeze X, I managed
>>>>> to track it down and fix it with some help from m.b.lankhorst, see
>>>>> https://bugs.freedesktop.org/show_bug.cgi?id=56692 for details.
>>>>>
>>>> Reviewed-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
>>>>
>>>> I recommended the bar flush since nvd0 does as well, and there might be a small race
>>>> otherwise.
>>>>
>>>> Can this still get in before final 3.7 release?
>>> This patch breaks vblank here (nv92) completely.

Same here on nv86.

> Does removing the bar flush help?

No, it does not.

Cheers,
       Sven