From: Keith Packard <keithp@keithp.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Share the common work of disabling active FBC before updating
Date: Thu, 07 Jul 2011 14:26:21 -0700 [thread overview]
Message-ID: <yunfwmhu6iq.fsf@aiko.keithp.com> (raw)
In-Reply-To: <1310073258-19976-1-git-send-email-chris@chris-wilson.co.uk>
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On Thu, 7 Jul 2011 22:14:18 +0100, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> Upon review, all path share the same dependencies for updating the
> registers and so we can benefit from sharing the code and checking
> early.
>
> This removes the unsightly intel_wait_for_vblank() from the lowlevel
> functions and upon further analysis the only path that will require a
> wait is if we are performing an instantaneous transition between two
> valid FBC configurations. The page-flip path itself will have disabled
> FBC registers and will have waited for at least one vblank before
> finishing the flip and attempting to re-enable FBC.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>
> Respun without the blocking wait. Noting instead that since we delay
> enabling FBC by 50ms we can assume that a vblank passes after disabling
> FBC and before modifying the control registers.
> -Chris
Looks good to me.
Reviewed-by: Keith Packard <keithp@keithp.com>
--
keith.packard@intel.com
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prev parent reply other threads:[~2011-07-07 21:26 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-07 11:48 FBC fixes for review and testing Chris Wilson
2011-07-07 11:48 ` [PATCH 1/6] drm/i915: Remove vestigial pitch from post-gen2 FBC control routines Chris Wilson
2011-07-07 16:12 ` Jesse Barnes
2011-07-07 11:48 ` [PATCH 2/6] drm/i915: Use of a CPU fence is mandatory to update FBC regions upon CPU writes Chris Wilson
2011-07-07 16:13 ` Jesse Barnes
2011-07-07 11:48 ` [PATCH 3/6] drm/i915: Set persistent-mode for ILK/SNB framebuffer compression Chris Wilson
2011-07-07 16:14 ` Jesse Barnes
2011-07-07 11:48 ` [PATCH 4/6] drm/i915: Disable FBC across page-flipping Chris Wilson
2011-07-07 16:15 ` Jesse Barnes
2011-07-07 11:48 ` [PATCH 5/6] drm/i915: Only export the generic intel_disable_fbc() interface Chris Wilson
2011-07-07 16:16 ` Jesse Barnes
2011-07-07 17:19 ` [PATCH] drm/i915: Replace direct calls to vfunc.disable_fbc with intel_disable_fbc() Chris Wilson
2011-07-07 11:48 ` [PATCH 6/6] drm/i915: Perform intel_enable_fbc() from a delayed task Chris Wilson
2011-07-07 16:20 ` Jesse Barnes
2011-07-07 17:12 ` [PATCH] drm/i915: Flush any scheduled tasks during unload Chris Wilson
2011-07-07 15:45 ` FBC fixes for review and testing Keith Packard
2011-07-07 20:30 ` [PATCH] drm/i915: Share the common work of disabling active FBC before updating Chris Wilson
2011-07-07 20:52 ` Keith Packard
2011-07-07 21:14 ` Chris Wilson
2011-07-07 21:26 ` Keith Packard [this message]
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