From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chris Wilson , Daniel Vetter Subject: [PATCH 3.16 026/357] drm/i915: Disable RCS flips on Ivybridge Date: Fri, 3 Oct 2014 14:26:52 -0700 Message-Id: <20141003212934.256541428@linuxfoundation.org> In-Reply-To: <20141003212933.458851516@linuxfoundation.org> References: <20141003212933.458851516@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Wilson commit 2a92d5bca1999b69c78f3c3e97b5484985b094b9 upstream. We currently see random GPU hangs when using RCS flips with multiple pipes on Ivybridge. Now that we have mmio flips, we can fairly cheaply fallback to using CPU driven flips instead. Signed-off-by: Chris Wilson Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77104 Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_display.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9294,6 +9294,8 @@ static int intel_crtc_page_flip(struct d if (IS_VALLEYVIEW(dev)) { ring = &dev_priv->ring[BCS]; + } else if (IS_IVYBRIDGE(dev)) { + ring = &dev_priv->ring[BCS]; } else if (INTEL_INFO(dev)->gen >= 7) { ring = obj->ring; if (ring == NULL || ring->id != RCS)