From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 8 Sep 2010 20:07:28 +0000 (+0100)
Subject: drm/i915/dp: Flush the PLL register write before sleeping
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1af5fa1b7e5ff8332f8a2ee3c5fb44d93b34868d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/i915/dp: Flush the PLL register write before sleeping

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 27805a9ca877..c7aa29bfdea9 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -883,6 +883,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder)
 	dpa_ctl = I915_READ(DP_A);
 	dpa_ctl |= DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
+	POSTING_READ(DP_A);
 	udelay(200);
 }