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From: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
To: "Chris Wilson" <chris@chris-wilson.co.uk>,
	"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
	"Intel Graphics" <intel-gfx@lists.freedesktop.org>
Subject: Re: [PATCH] drm/i915: Don't wait for vblank for sprite plane flips
Date: Mon, 01 Jul 2013 10:58:06 +0530	[thread overview]
Message-ID: <51D11366.1050202@intel.com> (raw)
In-Reply-To: <20130628160518.GD32183@cantiga.alporthouse.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

  reply	other threads:[~2013-07-01  5:28 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-28 14:15 [PATCH] drm/i915: Don't wait for vblank for sprite plane flips Vijay Purushothaman
2013-06-28 14:22 ` Kumar, Shobhit
2013-06-28 14:24 ` Ville Syrjälä
2013-06-28 16:05   ` Chris Wilson
2013-07-01  5:28     ` Vijay Purushothaman [this message]
2013-07-01  5:26   ` Vijay Purushothaman
2013-07-01  8:20     ` Ville Syrjälä

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