From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120608041849.128330238@decadent.org.uk> Date: Fri, 08 Jun 2012 05:19:42 +0100 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Chris Wilson , Keith Packard Subject: [ 62/82] drm/i915:: Disable FBC on SandyBridge In-Reply-To: <20120608041840.861504477@decadent.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Wilson commit d56d8b28e9247e7e35e02fbb12b12239a2c33ad1 upstream. Enabling FBC is causing the BLT ring to run between 10-100x slower than normal and frequently lockup. The interim solution is disable FBC once more until we know why. Signed-off-by: Chris Wilson Signed-off-by: Keith Packard Signed-off-by: Ben Hutchings --- drivers/gpu/drm/i915/intel_display.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b3b51c4..19f35ec 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1872,7 +1872,7 @@ static void intel_update_fbc(struct drm_device *dev) if (enable_fbc < 0) { DRM_DEBUG_KMS("fbc set to per-chip default\n"); enable_fbc = 1; - if (INTEL_INFO(dev)->gen <= 5) + if (INTEL_INFO(dev)->gen <= 6) enable_fbc = 0; } if (!enable_fbc) {