From 32608ca255ef0da1a70239a731a1fcdbb212d3f2 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Wed, 11 Mar 2015 11:10:27 +0200 Subject: [PATCH] drm/i915/bxt: add GEN8_SDEUNIT_CLOCK_GATE_DISABLE workaround Signed-off-by: Imre Deak Reviewed-by: Nick Hoath Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 767a3e2..a3247e8 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -96,7 +96,18 @@ static void skl_init_clock_gating(struct drm_device *dev) static void bxt_init_clock_gating(struct drm_device *dev) { + struct drm_i915_private *dev_priv = dev->dev_private; + gen9_init_clock_gating(dev); + + /* + * FIXME: + * GEN8_SDEUNIT_CLOCK_GATE_DISABLE applies on A0 only. + */ + /* WaDisableSDEUnitClockGating:bxt */ + I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) | + GEN8_SDEUNIT_CLOCK_GATE_DISABLE); + } static void i915_pineview_get_mem_freq(struct drm_device *dev) -- 2.7.4