From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: [RFC 3/3] i915: Drop vblank_offdelay Date: Wed, 16 Nov 2011 09:20:53 -0500 Message-ID: <1321453253-20183-4-git-send-email-mjg@redhat.com> References: <1321453253-20183-1-git-send-email-mjg@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1321453253-20183-1-git-send-email-mjg@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, Matthew Garrett List-Id: intel-gfx@lists.freedesktop.org Sandybridge, at least, seems to manage without any vblank offdelay. Dropping this reduces the number of wakeups on an otherwise idle system dramatically. Signed-off-by: Matthew Garrett --- drivers/gpu/drm/i915/i915_dma.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index a9533c5..46e7172 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1917,6 +1917,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) goto free_priv; } + /* vblank is reliable */ + dev->vblank_offdelay = 0; + /* overlay on gen2 is broken and can't address above 1G */ if (IS_GEN2(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30)); -- 1.7.7.1