From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915/sprite: Avoid incurring extra vblank stall when updating plane on IVB
Date: Wed, 18 Apr 2012 09:23:46 -0700 [thread overview]
Message-ID: <20120418092346.46cd7d4d@jbarnes-desktop> (raw)
In-Reply-To: <1334765546-733-1-git-send-email-chris@chris-wilson.co.uk>
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>
--
Jesse Barnes, Intel Open Source Technology Center
next prev parent reply other threads:[~2012-04-18 16:23 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 [this message]
2012-04-21 16:53 ` Daniel Vetter
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