From 298b0b392c750137f148fda056a7d4c42019814c Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Oct 2010 16:01:24 -0700 Subject: [PATCH] drm/i915/dp: make eDP PLL functions work as advertised Signed-off-by: Jesse Barnes Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/intel_dp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index ada7319f0eaf..128c2fefd541 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -891,8 +891,10 @@ static void ironlake_edp_pll_on(struct drm_encoder *encoder) DRM_DEBUG_KMS("\n"); dpa_ctl = I915_READ(DP_A); - dpa_ctl &= ~DP_PLL_ENABLE; + dpa_ctl |= DP_PLL_ENABLE; I915_WRITE(DP_A, dpa_ctl); + POSTING_READ(DP_A); + udelay(200); } static void ironlake_edp_pll_off(struct drm_encoder *encoder) @@ -902,7 +904,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder) u32 dpa_ctl; dpa_ctl = I915_READ(DP_A); - dpa_ctl |= DP_PLL_ENABLE; + dpa_ctl &= ~DP_PLL_ENABLE; I915_WRITE(DP_A, dpa_ctl); POSTING_READ(DP_A); udelay(200); -- 2.39.2