From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paulo Zanoni Subject: [PATCH 1/2] drm/i915: POSTING_READ IPS_CTL before waiting for the vblank Date: Thu, 19 Sep 2013 17:03:05 -0300 Message-ID: <1379620986-1702-2-git-send-email-przanoni@gmail.com> References: <1379620986-1702-1-git-send-email-przanoni@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-vc0-f176.google.com (mail-vc0-f176.google.com [209.85.220.176]) by gabe.freedesktop.org (Postfix) with ESMTP id 2A90BE6281 for ; Thu, 19 Sep 2013 13:03:29 -0700 (PDT) Received: by mail-vc0-f176.google.com with SMTP id lf11so6775866vcb.21 for ; Thu, 19 Sep 2013 13:03:28 -0700 (PDT) In-Reply-To: <1379620986-1702-1-git-send-email-przanoni@gmail.com> 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: intel-gfx@lists.freedesktop.org Cc: Paulo Zanoni List-Id: intel-gfx@lists.freedesktop.org From: Paulo Zanoni Make sure we write to IPS before we actually wait. Signed-off-by: Paulo Zanoni --- drivers/gpu/drm/i915/intel_display.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fc55570..78ff5ed 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3386,6 +3386,7 @@ static void hsw_disable_ips(struct intel_crtc *crtc) assert_plane_enabled(dev_priv, crtc->plane); I915_WRITE(IPS_CTL, 0); + POSTING_READ(IPS_CTL); /* We need to wait for a vblank before we can disable the plane. */ intel_wait_for_vblank(dev, crtc->pipe); -- 1.8.3.1