From 5bb0c2fd8c41dbee8ada1124d625c05765cd3f02 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Fri, 18 Apr 2014 18:04:29 -0300 Subject: [PATCH] drm/i915/bdw: Disable idle DOP clock gating It seems we need this at least for the current platforms we have, but probably not later. In any event, it should cause too much harm as we do the same thing on several other platforms. Signed-off-by: Ben Widawsky Signed-off-by: Rodrigo Vivi Reviewed-by: Brad Volkin 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 0b337622aeb5..94d3d92ff214 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4978,6 +4978,10 @@ static void gen8_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE)); + /* WaDisableDopClockGating:bdw May not be needed for production */ + I915_WRITE(GEN7_ROW_CHICKEN2, + _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); + /* WaSwitchSolVfFArbitrationPriority:bdw */ I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); -- 2.39.5