From 13a86b85aca24f825c7843cdcd81eaff19fa4ea9 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 24 Apr 2012 14:51:43 +0100 Subject: [PATCH] drm/i915: CR clock gating is recommend to be set on PineView The specs recommend that this bit be set on PineView. No reason is given, but it sounds like a powersaving bit that we should expect the BIOS to be setting... v2: Rebase on top of _MASKED_ENABLE_BIT Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 93d4ce3fc122..0552058a202f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2878,6 +2878,9 @@ static void gen3_init_clock_gating(struct drm_device *dev) dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | DSTATE_DOT_CLOCK_GATING; I915_WRITE(D_STATE, dstate); + + if (IS_PINEVIEW(dev)) + I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); } static void i85x_init_clock_gating(struct drm_device *dev) -- 2.20.1