drm/i915/bxt: Power down DDI PHYs separately during the per PHY uninit

The power-down step logically belongs to the individual PHY uninit
sequence so move it there. The only functional change is that we will
power down now PHY 1 separately before PHY 0 and preserve the other bits
in the register which are defined as reserved.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459515767-29228-11-git-send-email-imre.deak@intel.com

drivers/gpu/drm/i915/intel_ddi.c

@@ -1849,15 +1849,16 @@ static void broxton_phy_uninit(struct drm_i915_private *dev_priv,
 	val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
 	val &= ~COMMON_RESET_DIS;
 	I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
+
+	val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
+	val &= ~GT_DISPLAY_POWER_ON(phy);
+	I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
 }
 
 void broxton_ddi_phy_uninit(struct drm_i915_private *dev_priv)
 {
 	broxton_phy_uninit(dev_priv, DPIO_PHY1);
 	broxton_phy_uninit(dev_priv, DPIO_PHY0);
-
-	/* FIXME: do this in broxton_phy_uninit per phy */
-	I915_WRITE(BXT_P_CR_GT_DISP_PWRON, 0);
 }
 
 void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)