From: Chris Wilson Date: Wed, 8 Sep 2010 20:07:28 +0000 (+0100) Subject: drm/i915/dp: Flush the PLL register write before sleeping X-Git-Tag: firefly_0821_release~7613^2~3600^2~31^2~163 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1af5fa1b7e5ff8332f8a2ee3c5fb44d93b34868d;p=firefly-linux-kernel-4.4.55.git drm/i915/dp: Flush the PLL register write before sleeping Signed-off-by: Chris Wilson --- 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); }