drm/i915: vlv: make CRI clock enabling explicit during resume

intel_init_dpio() isn't called during resume, so we won't set the CRI
clock enable bit during that time. Move the enabling to
intel_reset_dpio() instead.

Note that the HW reset value for this bit is 1, so probably this patch
won't make any difference. We should still make the setting explicit,
since BIOS could change things under us.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -1364,10 +1364,6 @@ static void intel_init_dpio(struct drm_device *dev)
 	if (!IS_VALLEYVIEW(dev))
 		return;
 
-	/* Enable the CRI clock source so we can get at the display */
-	I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
-		   DPLL_INTEGRATED_CRI_CLK_VLV);
-
 	DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
 }
 
@@ -1378,6 +1374,10 @@ static void intel_reset_dpio(struct drm_device *dev)
 	if (!IS_VALLEYVIEW(dev))
 		return;
 
+	/* Enable the CRI clock source so we can get at the display */
+	I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
+		   DPLL_INTEGRATED_CRI_CLK_VLV);
+
 	/*
 	 * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
 	 *  6.	De-assert cmn_reset/side_reset. Same as VLV X0.