From 97058870e616631a80721e08d5797d7da4b23b0a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 3 Dec 2013 11:30:09 +0200 Subject: [PATCH] drm/i915: Clear out old GT FIFO errors in intel_uncore_early_sanitize() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The BIOS or someone else might have done something bad and there might be old GT FIFO erros reported in GTFIFODBG. Clear those out in intel_uncore_early_sanitize() to make sure we don't mistake them for our problems. Signed-off-by: Ville Syrjälä Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_uncore.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 8102af9a178d..32527a74dc46 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -332,6 +332,11 @@ void intel_uncore_early_sanitize(struct drm_device *dev) DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size); } + /* clear out old GT FIFO errors */ + if (IS_GEN6(dev) || IS_GEN7(dev)) + __raw_i915_write32(dev_priv, GTFIFODBG, + __raw_i915_read32(dev_priv, GTFIFODBG)); + intel_uncore_forcewake_reset(dev); } -- 2.34.1