Re: [PATCH] drm/i915: Don't wait for vblank for sprite plane flips

[Vijay Purushothaman <vijay.a.purushothaman@intel.com>]

On 6/28/2013 9:35 PM, Chris Wilson wrote:
> On Fri, Jun 28, 2013 at 05:24:50PM +0300, Ville Syrjälä wrote:
>> On Fri, Jun 28, 2013 at 07:45:31PM +0530, Vijay Purushothaman wrote:
>>> Since the sprite planes are using synchronized MMIO based flip, no need
>>> to wait for vblank. Removing this wait allows us to get a nice
>>> performance boost to both 3D & media workloads based on sprite (~60 fps
>>> from ~20 fps)
>>
>> Nak. We can't unpin the buffer until the hardware has finished reading
>> from it.
>>
>> The proper fix is to do the unpin asynchronously after the flip has
>> completed. That's one part of the bigger atomic pageflip story.
>
> The interested reader is invited to review the patches to do async
> unpinning here and in set-base sent many, many moons ago.
> -Chris
>
Thanks Chris. I will try to dig for those patches. In case if you have 
the pointers handy, would you mind pointing me to the patch series?

Thanks,
Vijay