[Nouveau] [PATCH] drm/nv84+: fix fence context seqno's

Maarten Lankhorst maarten.lankhorst at canonical.com
Tue Sep 23 07:24:45 PDT 2014

Op 23-09-14 om 07:35 schreef Ben Skeggs:
> On Tue, Sep 23, 2014 at 2:23 AM, Ted Percival <ted at tedp.id.au> wrote:
>> On 09/22/2014 03:08 AM, Maarten Lankhorst wrote:
>>> This fixes a regression introduced by "drm/nouveau: rework to new fence interface"
>>> (commit 29ba89b2371d466).
>>> The fence sequence should not be reset after creation, the old value is used instead.
>>> On destruction the final value is written, to prevent another source of accidental
>>> wraparound in case of a channel being destroyed after a hang, and unblocking any other
>>> channel that may wait on the about-to-be-deleted channel to signal.
>>> I'm nothing if not optimistic about any hope of recovery from that. ;-)
>>> Reported-by: Ted Percival <ted at tedp.id.au>
>>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
> Acked-by: Ben Skeggs <bskeggs at redhat.com>
> I'm still seeing issues with suspend, even with this patch, and the
> one you pastebinned recently.
Annoying, and I'm out of ideas. The pastebinned patch is posted to dri-devel as:
[PATCH 2/8] drm/nouveau: specify if interruptible wait is desired in nouveau_fence_sync.

Could you bisect to where the suspend issues started? With this patch applied after
"drm/nouveau: rework to new fence interface", and the other patch applied after
"drm/nouveau: use shared fences for readable objects"


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