From: Daniel Vetter <daniel@ffwll.ch>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915/sprite: Avoid incurring extra vblank stall when updating plane on IVB
Date: Sat, 21 Apr 2012 18:53:55 +0200 [thread overview]
Message-ID: <20120421165355.GG5019@phenom.ffwll.local> (raw)
In-Reply-To: <20120418092346.46cd7d4d@jbarnes-desktop>
On Wed, Apr 18, 2012 at 09:23:46AM -0700, Jesse Barnes wrote:
> On Wed, 18 Apr 2012 17:12:26 +0100
> Chris Wilson <chris@chris-wilson.co.uk> wrote:
>
> > IvyBridge requires an extra frame between disabling the low power
> > watermarks and enabling scaling on the sprite plane. If the scaling
> > is already enabled, then we have already disabled the low power
> > watermarks and need not incur an extra wait.
> >
> > Similarly, as we disable the scaling when turning off the sprite plane,
> > we can update the scaling enabled flag and restore the low power
> > watermarks.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
> > ---
>
> Yep, this is a good optimization.
>
> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Queued for -next, thanks for the patch.
-Daniel
--
Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48
prev parent reply other threads:[~2012-04-21 16:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-18 16:12 [PATCH] drm/i915/sprite: Avoid incurring extra vblank stall when updating plane on IVB Chris Wilson
2012-04-18 16:23 ` Jesse Barnes
2012-04-21 16:53 ` Daniel Vetter [this message]
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