From 5c9664d75a65adcdb9763a6df1da1d8d3f417c0c Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 25 Oct 2012 12:15:43 -0700 Subject: [PATCH] drm/i915: implement WaForceL3Serialization on VLV and IVB MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit References: https://bugs.freedesktop.org/show_bug.cgi?id=50250 Reviewed-by: Ben Widawsky Signed-off-by: Jesse Barnes Reviewed-by: Antti Koskipää Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index aef23641fbcc..871bfe49b913 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3695,6 +3695,10 @@ static void valleyview_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); + /* WaForceL3Serialization */ + I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & + ~L3SQ_URB_READ_CAM_MATCH_DISABLE); + /* This is required by WaCatErrorRejectionIssue */ I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | -- 2.20.1