From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH 4/4] drm/i915: don't rewrite the GTT on resume v4 Date: Fri, 02 Nov 2012 17:13:56 +0000 Message-ID: References: <1351874380-7861-1-git-send-email-jbarnes@virtuousgeek.org> <1351874380-7861-4-git-send-email-jbarnes@virtuousgeek.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 9E82D9E7A0 for ; Fri, 2 Nov 2012 10:14:42 -0700 (PDT) In-Reply-To: <1351874380-7861-4-git-send-email-jbarnes@virtuousgeek.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Jesse Barnes , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Fri, 2 Nov 2012 09:39:40 -0700, Jesse Barnes wrote: > The BIOS shouldn't be touching this memory across suspend/resume, so > just leave it alone. This saves us ~6ms on resume on my T420 (retested > with write combined PTEs). > > v2: change gtt restore default on pre-gen4 (Chris) > move needs_gtt_restore flag into dev_priv > v3: make sure we restore GTT on resume from hibernate (Daniel) > use opregion support as the cutoff for restore from resume (Chris) > v4: use a better check for opregion (Chris) > > Signed-off-by: Jesse Barnes Ignoring the mistake in patch 2, Reviewed-by: Chris Wilson -Chris -- Chris Wilson, Intel Open Source Technology Centre