[PATCH] drm/i915: Before pageflip, also wait for shared dmabuf fences.

[Christian König]

Am 11.10.2016 um 05:58 schrieb Michel Dänzer:
> On 07/10/16 09:34 PM, Mike Lothian wrote:
>> This has discussion has gone a little quiet
>>
>> Was there any agreement about what needed doing to get this working
>> for i965/amdgpu?
> Christian, do you see anything which could prevent the solution I
> outlined from working?

I thought about that approach as well, but unfortunately it also has a 
couple of downsides. Especially keeping the exclusive fence set while we 
actually don't need it isn't really clean either.

I'm currently a bit busy with other tasks and so put Nayan on a road to 
get a bit into the kernel driver (he asked for that anyway).

Implementing the simple workaround to sync when we export the DMA-buf 
should be something like 20 lines of code and fortunately Nayan has an 
I+A system and so can actually test it.

If it turns out to be more problematic or somebody really starts to need 
it I'm going to hack on that myself a bit more.

Regards,
Christian.