From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Subject: Re: Request for feedback - Sprite flip notification
 support
Date: Wed, 5 Feb 2014 17:13:33 +0200
Message-ID: <20140205151333.GM3891@intel.com>
References: <52F25327.2060806@intel.com>
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To: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
Cc: intel-gfx@lists.freedesktop.org, "Goel, Akash" <akash.goel@intel.com>
List-Id: intel-gfx@lists.freedesktop.org

On Wed, Feb 05, 2014 at 08:35:11PM +0530, Vijay Purushothaman wrote:
> Hello,
> =

> In our current driver implementation we support flip notifications only =

> for primary plane. So, in a full screen video playback scenario where =

> only one sprite plane is active, the user space is forced to rely on =

> primary plane flip notification even though there is no real need for =

> this plane to be active. Ideally we should be able to support flip =

> notifications for any given plane. Switching off the primary plane (when =

> not used) will help in better memory self refresh & decent power savings..
> =

> We do have a hack in android product trees which supports flip =

> notifications for one sprite plane. unfortunately this hack in its =

> current form cannot be considered for up streaming...
> =

> My current thinking is to have an array of unpin_work items to match the =

> number of planes. Is anyone working on this or thought about this =

> scenario in detail? Any pointers / restrictions that needs to considered =

> for a generic implementation of this feature?

The plan is to implement the nuclear page flip which will take care of
all planes in the same way.

-- =

Ville Syrj=E4l=E4
Intel OTC