From 0a790cdbfc526890af7dc41515a563f09e427129 Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Wed, 17 Apr 2013 18:15:49 -0300 Subject: [PATCH] drm/i915: implement WADPOClockGatingDisable for LPT This should prevent mode set failures on LPT. Signed-off-by: Paulo Zanoni Reviewed-by: Damien Lespiau [danvet: Pimp the w/a tag to fit into Damien's new scheme.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 28cec57e3f8c..1a765723d37e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4093,6 +4093,11 @@ static void lpt_init_clock_gating(struct drm_device *dev) I915_WRITE(SOUTH_DSPCLK_GATE_D, I915_READ(SOUTH_DSPCLK_GATE_D) | PCH_LP_PARTITION_LEVEL_DISABLE); + + /* WADPOClockGatingDisable:hsw */ + I915_WRITE(_TRANSA_CHICKEN1, + I915_READ(_TRANSA_CHICKEN1) | + TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); } static void lpt_suspend_hw(struct drm_device *dev)